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The core challenges in machining helical gears lie in balancing geometric accuracy with thermal distortion control.

• First, the helical tooth form is a complex 3D surface; even micron-level deviations in tooth pitch, profile, or helix angle can cause uneven loading, noise, and premature failure during meshing.
• Second, these gears require a hard, wear-resistant surface and a tough core.

However, traditional heat treatment (carburizing and quenching) induces high internal stress, often causing warping that ruins machining precision.

To ensure reliability under high-load conditions, advanced manufacturing processes are employed:

• Hard Gear Finishing: Instead of basic hobbing, manufacturers use CNC worm wheel grinding machines. This “hard finishing” achieves high ISO gear accuracy grades and excellent surface finish, minimizing friction and noise.
• Vacuum Heat Treatment: Vacuum carburizing followed by high-pressure gas quenching is the industry benchmark. It ensures uniform case hardening while drastically reducing distortion compared to oil quenching, preserving the gear’s dimensional integrity.
• Surface Enhancement: Shot peening is applied to the tooth root to induce beneficial compressive residual stresses. This significantly boosts bending fatigue strength, preventing crack initiation under cyclic loading.
• Closed-Loop Metrology: Gear geometry is scanned using CNC gear analyzers. Any detected errors are fed back to the grinding machine for real-time compensation, ensuring consistent quality.

No.

Not all steel grades are suitable for carburizing and quenching. This process has strict requirements on the carbon content of base materials, and it is only compatible with low-carbon alloy steels. Medium-carbon and high-carbon steels are not recommended for this treatment.

If carburizing is carried out on medium-carbon steel, the base material already contains a relatively high carbon level. After carburizing, the overall hardness of the part will increase drastically while its internal toughness drops sharply. When such gears bear impact loads, failures including tooth root fracture and tooth chipping will easily occur, failing to satisfy the service requirements of transmission components.

For medium-carbon quenched and tempered steels, two standard heat treatment processes are generally adopted: quenching & tempering plus induction hardening, or quenching & tempering plus plasma/gas nitriding.

Normally we prefer to produce worm wheel together with its mating worm shaft as complete meshing test between worm wheel and worm shaft is essential for us to verify tooth contact and guarantee final product quality. Without the matching worm shaft on hand, we cannot carry out this essential meshing test, which leaves potential risks on actual assembly performance. However, if with your existing worm shaft sample available, we are able to manufacture only worm wheel without worm shaft and run meshing test with your worm shaft sample. This way we can still check the mesh condition and secure the quality of the worm wheel.

Yes, we can apply coatings to custom gears. Coatings are used to reduce friction, prevent rust, or make the gear last longer in tough conditions. Common coatings include black oxide, phosphate, nickel plating, and DLC (diamond-like carbon). Each one has different benefits. Black oxide is cheap and offers mild corrosion protection. Phosphate holds oil well and helps with break-in. Nickel plating resists rust and wear. DLC is expensive but very hard and slippery.

The time it takes depends on the coating type and the quantity of gears. Simple coatings like black oxide or phosphate usually take just a few days. Nickel plating takes a little longer, maybe a week. DLC and other specialized coatings can take two weeks or more because they require special equipment and careful handling.

We do not do coatings in-house. We send the gears to trusted coating partners. So the lead time includes shipping and scheduling at their facility. We will tell you the coating time when we give you the quote.

If you are not sure what coating is right for your gears, just tell us what the gear is used for and we will recommend something.

Our manufacturing capabilities for ring gears cover a wide spectrum. We can produce modules ranging from 0.5 mm (fine-pitch gears for instrumentation and robotics) up to 40 mm (heavy-duty gears for mining and marine applications). For the tooth count, we are not limited by any theoretical maximum—we have manufactured internal ring gears with as few as 12 teeth and as many as 800 teeth for large slewing ring applications.

However, there is a practical relationship between module and tooth count for a given pitch diameter: the pitch diameter equals module multiplied by tooth count (Dp = m × z). For a fixed bore size, a smaller module gives you more teeth (finer resolution, smoother operation), while a larger module gives you fewer teeth but thicker tooth sections (higher load capacity).

Our engineering team can advise on the optimal combination for your specific torque, speed, and space constraints. We also offer non-standard modules and can manufacture ring gears to customer-specified diametral pitch (DP) values for imperial-system designs. Prototype quantities and large-volume production batches are both accommodated.

The fundamental difference lies in the cutting geometry and tool accessibility. An external gear has teeth on the outside of the blank, allowing cutting tools such as hobs or milling cutters to approach from any direction with full clearance. An internal ring gear, however, has teeth cut into the inner surface of a ring-shaped blank, which restricts tool access and requires specialized machining methods. The most common production methods for internal ring gears are gear shaping (using a pinion-type shaper cutter that reciprocates vertically while rotating in mesh with the workpiece) and broaching (for smaller modules and high-volume production). Gear hobbing, which is the standard for external gears, cannot be used for internal gears because the hob cannot physically enter the bore. Additionally, internal gears present challenges in fixturing and workholding, as the blank must be securely clamped while allowing the cutter to traverse the entire tooth length. Heat treatment distortion is also more critical for ring gears, as any ovality or taper directly affects the mating external gear’s backlash and contact pattern. For these reasons, internal ring gears typically command a higher manufacturing cost and longer lead time compared to external gears of similar size and accuracy.

Unfortunately, we cannot manufacture well matched custom gears only according to a gearbox model code. Our factory can only commence production based on your engineering drawings or physical gear samples.

Once you send over the physical sample, our technical team will carry out reverse engineering measurement, inspect the raw material grade and original heat treatment condition, analyse the tooth contact pattern, replicate the original component or conduct optimisation for improved strength.
If you have complete drawings available, our engineers will check every dimension, surface treatment requirement and tolerance marking before production.

This is something we do often. Many customers come to us with a gear that is worn out or broken. They do not have a drawing. They do not have a CAD file. They just have the old gear in their hand. We can reverse engineer worn gears with no drawing.

First, we inspect the gear carefully. We measure the outside diameter, inside diameter, length, tooth count, tooth thickness, and tooth profile. If the gear is worn, we look for unworn areas to estimate the original size. We also check the mating part if you have it, because that tells us how the gear is supposed to fit.

Once we have all the measurements, we create a drawing based on what we found. We send that drawing to you for review and approval. This is your chance to check if the design looks right. If we have questions, we will ask before we start cutting metal.

We also check the material. We do a hardness test and sometimes a spark test to identify the steel grade. This helps us choose the right material for the replacement gear.

When you approve the drawing, we make the gear. The new gear will fit and perform like the original when it was new – or better if we improve the design.

We keep a copy of the drawing in our system, so if you ever need the same gear again, we can make it without having to reverse engineer it again.

Yes, we conduct inspections on all bevel gear meshing prior to delivery. Mesh inspection acts as a critical procedure to verify the performance and reliability of bevel gears, which checks key parameters including center distance, backlash, tooth contact pattern and noise level.

Mesh tests are mandatorily implemented for every batch before shipment. We will provide corresponding mesh inspection reports and test videos for your review. Feel free to contact us if you need a sample mesh test video for reference.

Yes, you are fully available to apply these fixtures and cutters to your own production processes. Should you require them to support your machining and production at your facility, we will send them as per your needs to you accordingly. If you have any specific requirements regarding the delivery schedule for these tools, please feel free to let us know in advance. Our team will coordinate everything properly and dispatch the goods appropriately to ensure they can be put into use in your production smoothly without unnecessary delays. And you can just send it back if it is needed in your subsequent order production to ensure smooth manufacturing.

Soft cutting and hard cutting refer to whether the gear teeth are machined before or after heat treatment. Soft cutting (also called “green cutting”) is performed on gears in their annealed or normalized state, typically with hardness below 30 HRC. This includes processes like hobbing, shaping, or milling.

1. Soft cutting is faster, produces less tool wear, and is more economical—ideal for roughing operations or for gears that do not require high precision (AGMA Q9 or lower). The cut teeth serve as the foundation for subsequent heat treatment. However, soft cutting introduces a critical challenge: thermal distortion during carburizing or quenching. The tooth geometry shifts unpredictably—pitch diameter can grow or shrink, tooth profiles become uneven, and runout increases.
2. Hard cutting is performed after heat treatment (typically 58–62 HRC) and includes processes like grinding, hard hobbing, or hard skiving. Hard cutting achieves much higher precision (AGMA Q12–15) because it corrects the distortion from heat treatment. The downside is that hard cutting is slower, requires specialized CNC machines and expensive CBN (cubic boron nitride) tools, and costs 2–3 times more than soft cutting.

In practice, many custom gear shops use a hybrid approach: soft cut the gear, perform heat treatment, then finish-grind only the critical tooth flanks to the final tolerance. Choosing between the two depends on your accuracy requirements, budget, and production volume—for high-volume automotive gears, hard cutting is standard; for low-volume industrial gears where precision is less critical, soft cutting alone may suffice.

As we specialize in customized gear & shaft project, there is no strict MOQ on our side. We fully understand that you may have diverse procurement needs at different stages. Whether it is small-batch production or bulk orders, we can accept and arrange production properly according to your actual demand quantity. Therefore, producing gears in very small quantity is acceptable and will be fully supported by our technical and production department. In production process, we will weekly update the production progress for your review. After manufacturing, each batch regardless of bulk or small quantity will be accompanied with full quality reports including material, heat treatment, dimension, accuracy and the like for your checking.

Yes, most custom gears manufacturers offer or subcontract a range of coatings and surface treatments, though they often do not perform these in-house. Common treatments include zinc phosphate (rust prevention and break-in lubricant retention), black oxide (corrosion resistance), manganese phosphate (improved wear resistance and oil retention), nickel plating (corrosion and wear resistance), PTFE (Teflon) or MoS₂ coatings (dry lubrication for low-speed, high-load applications), and DLC (diamond-like carbon) coatings (high-performance friction reduction).

However, you should be aware that coating application nearly always involves a third-party vendor, which introduces additional quality control challenges and lead time. Typical coating turnaround adds 3–7 business days beyond gear completion, but specialized coatings (e.g., aerospace-grade DLC) can take 2–3 weeks. It is essential to specify the coating thickness and adhesion requirements on your drawing, as excessive thickness can alter tooth geometry, affecting backlash and contact patterns. Also, grinding is usually done after heat treatment but before coating—coating thickness must be accounted for in final dimension calculations. For high-precision ground gears, you should request a coating inspection certificate (adhesion test, thickness measurement, and salt spray test) with the shipment. Some manufacturers offer a “turnkey” service where they manage the entire coating supply chain, while others expect you to arrange coating separately—always confirm this upfront.

We are a custom gear manufacturer, so we do not maintain large amount of standard stock gears. However, we do keep commonly used raw materials and semi-finished blanks in stock — such as 20CrMnTi and 42CrMo round bars, and pre-heat-treated blanks for frequent sizes. This allows us to respond quickly to urgent orders. If you need a standard gear off-the-shelf, we can recommend trusted suppliers, but our core business is custom manufacturing. For custom orders, we hold no finished stock until your order is placed.

Yes, we can fully meet the corrosion resistance requirements for marine gears.

Belon has extensive experience in manufacturing corrosion-resistant gears for marine equipment, and the key lies in selecting the right materials. Our field-verified material choices are 316L stainless steel and 10-5-5 nickel aluminum bronze (QAl10-5-5). Both materials withstand seawater and salt spray corrosion with stable and reliable performance, and have performed excellently under real marine operating conditions, earning high customer satisfaction.

In addition, we can provide material test certificates. Our engineers can also adjust heat treatment and surface finishing processes in accordance with your technical specifications for marine equipment.

For this spiral bevel gear, we recommend using 20CrMnTi alloy steel​ processed with Carburizing and Quenching for gear materials and heat treatments. This material offers an exceptional balance of surface hardness and core toughness. The carburizing process involves heating the gear in a carbon-rich atmosphere to around 930°C, allowing carbon to diffuse into the surface layer to form a high-carbon case. Subsequent quenching (usually in oil) transforms the surface austenite into martensite, achieving a surface hardness of HRC 58–62, which provides excellent wear and pitting resistance. The core retains a tough, ductile structure (such as tempered martensite or ferrite-pearlite), ensuring strong impact resistance and preventing brittle fracture under heavy loads. Compared to 40Cr, 20CrMnTi delivers deeper and more uniform hardening, making it far more durable in demanding applications. Post-heat treatment, we perform gear lapping (running-in)​ to eliminate microscopic imperfections and ensure optimal tooth contact, resulting in quiet and reliable operation. All processes are traceable, and we provide full inspection documentation, including hardness mapping and metallographic analysis, to ensure compliance with international quality standards.

Yes, we can. A blanket order is a great way to handle multiple small orders without having to go through the quoting and ordering process every time.

Here is how it works. You tell us how many gears you expect to need over the next six months or a year. We agree on a price per piece, a delivery schedule, and a lead time. Then we set up a blanket order. When you need gears, you just send us a release – a simple instruction that says “ship 20 pieces now” or “ship 50 pieces next month.” We ship them, bill you, and keep track of how many pieces are left on the blanket order.

This saves everyone’s time. You do not have to request a new quote every time. We do not have to re-enter your information into our system every time. The pricing stays consistent, and you get the same priority as a large order.

Blanket orders also help with planning. We can order material in advance and reserve production time. That means your parts get made faster than if you placed a new order from scratch each time.

There is no minimum size for a blanket order. If you expect to order 100 pieces over the year in batches of 10 or 20, that works. If you expect to order 500 pieces in batches of 50, that works too. We can set up whatever schedule fits your needs.

We do not charge extra for setting up a blanket order. We just need a rough estimate of your total quantity and a release schedule. If your needs change during the year, we can adjust the order. We are flexible.

Yes, we can. While standard pressure angles are 20° for most gears (and 14.5° or 25° for some applications), we regularly produce gears with custom pressure angles upon request. We can also manufacture special tooth profiles such as cycloidal, involute, or custom-designed profiles for specific applications. The only limitation is tooling — if we don’t have the required hob or cutter in stock, we will need to order or grind a custom tool, which may affect lead time and cost. We will advise you on this when quoting.

Yes, we are technically capable of manufacturing gears without performing any heat treatment processes if this is your specific requirement. We can complete all machining procedures including turning, hobbing, shaping, and other finishing works purely based on the original material, skipping the heat treatment solution entirely. Therefore, you could perform heat treatment by yourself in house. Heat treatment is a critical step to balance the surface hardness and core toughness of gears. It can meet your simple needs and lower the cost if under low load capacity and speed. But for most industrial transmission equipment with normal or heavy working loads, it is suitable to perform heat treatment to avoid frequent replacement and extra maintenance costs.

We use a combination of in-process checks and final inspection. During production, operators monitor key dimensions at each stage — after hobbing/shaping, after heat treatment, and after grinding. Critical parameters like tooth thickness and runout are checked on the machine before moving to the next step. Heat treatment is monitored with hardness test coupons that travel with the batch. Our final inspection includes a full dimensional check on a gear measuring center, with a report provided to you. This layered approach ensures that issues are caught early, not just at the end.

1.Raw Material Stage

We first conduct incoming inspection on raw materials, then carry out blanking and forging, followed by re-inspection after completion.

2.Rough Machining and Pre-heat Treatment

Pre-heat treatment, rough turning and finish turning are carried out in sequence, with inspection after all these processes.

3.Gear Machining and Heat Treatment

4.Finishing Process

CNC machining → OD grinding → gear lapping. In-process inspections are conducted to ensure dimensional accuracy.

5.Finishing and Shipment

Finally, the parts are cleaned and marked before packing for delivery.

Yes, we do. A “one-off” gear means just one piece – not a batch, not a production run. Some customers only need one gear. Maybe it is for a prototype they are testing. Maybe it is a replacement for a machine that broke and they only need one. Maybe they are building something custom and just need one gear to fit a specific space.

We are happy to make one piece. We do not have a minimum order quantity. One gear is fine with us.

Now, here is the catch. One gear costs more per piece than a large batch. That is because the setup work is the same whether we make one gear or a thousand. We still have to program the machine, set up the tooling, and check the first piece. That takes time. With a large batch, we spread that setup cost over many parts. With one piece, all of that cost goes into just that one gear.

But we do not try to punish small orders. We will give you a fair price for the one gear you need. We will also treat it with the same care and quality as a large order. It gets inspected, heat treated, and packaged properly.

If you need one gear for a special project, just send us your drawing or sample. We will quote you a price and lead time. We have done one-off gears for all kinds of things – vintage car restorations, prototype machines, custom race cars, and even art installations.

We understand that not every project needs a hundred pieces. Sometimes you just need one. And that is okay with us.

Spiral bevel gears have 2 tooth geometry systems: Gleason spiral bevel gear and the Klingelnberg spiral bevel gear. Each system influences the cutting and finishing methods. Below introduced 3 primary processes for spiral bevel gears, each suited for different precision and production requirements.

1. Gleason Lapping

This is a fine finishing process, Spiral bevel gears and spiral bevel pinion are meshing together with an abrasive compound to improve surface smoothness and optimize the contact pattern. The accuracy usually DIN7-8. It reduces noise and vibration in medium-load transmissions, and cost-effective for achieving good running performance without the expense of grinding.

2. Gleason Grinding

This precision process uses a grinding wheel to achieve very high accuracy DIN5-6 and an excellent surface finish on hardened gears. It is the preferred choice for high-performance applications like aerospace and automotive gearboxes requiring extremely low backlash and some other heavy load industries. It delivers the highest dimensional accuracy and surface quality.

3. Klingelnberg Hard Cutting

This process involves cutting or shaping gear teeth directly from hardened blanks after heat treatment, eliminating the need for post-cutting heat treatment. It ensures hardness consistency and micro-accuracy while maintaining production efficiency. It offers high accuracy DIN5-6, which is a productive alternative to grinding for hardened gears, with minimal distortion.

Yes, we are fully capable of manufacturing customized shafts with various stainless steel materials. We can process all types of stainless steel shafts based on your drawing requirements. Our workshop owns complete CNC lathes, grinders and milling machines to complete turning, grinding and other processing. After manufacturing, all finished stainless steel shafts undergo strict quality checks including dimension tolerance, surface roughness, raw material composition and the like. Once receiving your technical drawing, our technical team will recommend the most suitable stainless steel grade and provide our best possible offer for your checking.

The processing difficulties of zero bevel gears are as follows:

• High machine tool precision required: Must use specialized bevel gear cutting machines from Gleason or other brands; ordinary gear hobbing machines cannot process them.
• Complex cutter head adjustment: The cutter head diameter, number of blades, and tip radius all require precise calculation and adjustment.
• Difficult contact pattern control: The contact pattern of zero degree bevel gears is very sensitive to changes in mounting distance, requiring repeated adjustments during machining and assembly.
• Heat treatment distortion: Due to the complex tooth geometry, distortion after carburizing and quenching is difficult to predict and control, often requiring grinding stock to be left and corrected during the grinding process.
• Strict pairing requirements: Each pair of gears must undergo lapping to achieve the ideal contact state and cannot be interchanged arbitrarily.

The manufacturing process for zero degree bevel gears is relatively complex. The main steps are as follows:

(1) Blank Preparation

Obtain blanks through forging or bar stock cutting.

Normalizing or annealing treatment to relieve internal stresses.

Rough turning of the outer diameter, end faces, and inner bore.

(2) Tooth Cutting

Zero degree bevel gears must be processed on specialized bevel gear cutting machines, the most famous of which are Gleason machines. There are two processing methods:

Generating Method

• Uses a cutter head with curved blades.
• The workpiece and the tool perform cutting according to a specific generating motion relationship.
• Suitable for batch production, offering high efficiency and accuracy.

Formate Method

• The larger gear is processed using the Formate method, where the tool shape exactly matches the tooth space.
• The smaller pinion is still processed using the Generating method to pair with it.
• Suitable for large module gears and small-batch production.

(3) Heat Treatment

Carburizing and quenching, or surface hardening.

Careful control of distortion is required; pre-deformation treatment may be applied when necessary.

(4) Finishing

Grinding: Uses CBN grinding wheels on specialized gear grinding machines to precision grind the tooth flanks, achieving accuracy up to DIN Grade 5.

Lapping: Paired gears are lapped together to improve the contact pattern and surface roughness.

Honing: Further improves surface quality and reduces noise.

(5) Inspection

Contact pattern inspection (using red lead powder or specialized testing machines).

Inspection of pitch deviation, tooth profile error, and tooth trace error.

Noise and vibration testing.

Yes, we encourage small trial orders. Even 2-5 pairs for a prototype or repair is acceptable. A trial order allows you to verify our quality, lead time, and communication before committing to larger volumes. The unit price for small batches will be higher due to fixed tooling and setup costs, but those costs are a one-time investment. Once you are satisfied, we can move to volume production with better pricing.

Yes absolutely, we are fully capable of manufacturing large-sized shafts with an overall length around or over 1000mm. Our factory is equipped with complete precision machines and equipment including lathes, grinding machines and heat treatment tempering furnace to process shafts of this specification smoothly. We can strictly control dimensional tolerances, surface finish and mechanical performance according to your technical drawings and quality requirements. Whether you need small samples or bulk orders for these big shafts, we can arrange production accordingly and guarantee stable delivery schedules to meet your needs and support your project.

Yes, we can. This is another thing we do quite often. You have a machine that works fine, but one gear keeps breaking or wearing out too fast. You are tired of replacing it every year. You want something tougher. We can help with that.

The first thing we need to figure out is why the original gear is failing. Is it breaking – like teeth snapping off or the shaft twisting? Or is it wearing down – teeth getting thin, splines getting loose? Different problems need different solutions.

If the gear is breaking, that usually means it is not strong enough for the load. Maybe the original material was too soft. Maybe the heat treatment was not done right. Maybe the gear was just designed for lighter work than what you are using it for. To fix this, we can use a stronger steel – like moving from carbon steel to alloy steel. We can also change the heat treatment to make the gear tougher on the inside so it does not snap under shock loads. Sometimes we make the gear a little bigger if there is room, or change the tooth shape to spread the load better.

If the gear is wearing down, that means the surface is not hard enough. The teeth are rubbing against something and slowly grinding away. To fix this, we can use a harder surface. We can case harden the gear – that makes the outside very hard but leaves the inside tough. We can also use a different material, like a steel with more carbon or alloy elements that resist wear better. Sometimes we add a coating or a surface treatment that reduces friction.

There is a trade-off though. A harder gear resists wear better, but it can be more brittle. A tougher gear resists breaking better, but it might wear out faster. So we need to find the right balance for your machine. Tell us what the problem is, and we will recommend a solution.

We should also check the rest of your machine. Sometimes the gear is failing because something else is wrong – like bad bearings, misalignment, or poor lubrication. If that is the case, a stronger gear might still fail because it is just a symptom of a bigger problem. We can help you figure that out too.

So yes – if your original gear is not lasting long enough, we can make you a better one. Stronger steel, better heat treatment, harder surface. Just tell us what is breaking or wearing out, and we will build something that lasts longer.

That is a pretty common question, and the answer is – normally, it takes us about 50 to 60 days to finish a custom gear project. That timeline covers everything from the very start to the moment the gears are ready to ship.

Let me break down what happens in those 50 to 60 days so you understand where the time goes.

• First, we need to get the raw material. We do not just grab random steel off a shelf. For custom gears, we order specific grades of steel that match your application. Sometimes we have that steel in stock. Other times we need to order it from a mill, and that can take a week or two just for the material to show up. So the clock starts ticking as soon as we confirm your order.
• Next comes the machining. This is where we actually cut the gear teeth. Depending on how complex your gear is, this can take anywhere from a few days to a couple of weeks. A simple spur gear is pretty fast. A helical gear or a gear with special tooth profile takes longer. We also have to cut any splines or keyways if your gear needs them. All of that takes time, especially if we have other orders running at the same time.
• After the teeth are cut, we do heat treatment. This is a critical step. The gear gets heated up to a very high temperature and then cooled down in a controlled way. This makes the surface hard so the teeth do not wear out fast, but keeps the inside tough so the gear does not snap under shock. Heat treatment itself might only take a day or two, but we also need to schedule it with our heat treat shop, and sometimes there is a queue.
• Then comes grinding. Most custom gears need some grinding after heat treatment. Heat can cause the gear to change shape just a little bit – maybe a few thousandths of an inch. Grinding brings everything back to the exact dimensions your drawing calls for. This step is slow and careful. If we rush it, the gear might not fit right.
• Finally, we inspect everything. We check the tooth size, the hardness, the surface finish, and the fit with a mating part or a gauge. This takes time too. We do not skip this step because we want to be sure the gear is right before it leaves our shop.
• After inspection, we package the gears and get them ready to ship.

Now, here is the thing. That 50 to 60 day number is our regular lead time for most projects. But it can change depending on your specific situation.

If you order a very large quantity – say, thousands of gears – the production time might be longer because we have to run more batches. We might need to order more material, and the machining and heat treatment take longer just because there are more parts to process.

On the other hand, if you order a small quantity – maybe just a few pieces for a prototype – we might be able to do it faster than 50 days. Small batches can sometimes move through the shop quicker because there are fewer parts to make and inspect.

Also, the way we make the gear affects the timeline. Some manufacturing processes are faster than others. For example, hobbing is pretty quick for most gears. Gear shaping takes a bit longer. If your gear needs a special tooth profile or a very tight tolerance, that adds time too. So the specific craft we choose – hobbing, shaping, grinding, etc. – will affect the lead time.

The bottom line is, 50 to 60 days is a good estimate for most custom gear projects. When you send us your drawing and tell us how many pieces you need, we will give you a more exact date. And if you need the gears faster than usual, let us know. We can sometimes rush an order, but that might cost extra. Just ask us, and we will be honest about what we can do.

1. We will send you weekly email updates regarding the latest progress of the production process, ensuring full transparency.
2. Our quality assurance team will share a comprehensive quality report for your review prior to shipment.
3. Once the goods have been shipped, our logistics team will provide you with timely updates on their current status. This allows you to track the exact location of your shipment and helps you make necessary preparations for import procedures in advance.
4. To ensure better protection for the components, we will individually wrap each item in protective foam packaging and send you photographs for your inspection.

Definitely yes, we attach great importance to full production transparency for every order to our customer. In the whole production process, pictures and videos of key production stages will be sent for your further vividly knowing about our production process and status. Besides, we will regularly weekly update the newest production progress with you. When finishing manufacturing, the comprehensive quality reports including heat treatment report, material report, dimension report, accuracy report and the like will be sent for your checking at once before shipment. Only after your approval will we pack and ship the products to you.

For most of our projects, we do not really have a strict MOQ (Minimum Order Quantity). There is no magic number where we suddenly say yes or no. You can order one piece, or you can order ten thousand pieces. Either way, we will make them for you.

Now, here is the part that does matter. The quantity you order affects the price. That is probably not a surprise. Making gears and shafts involves some upfront work – setting up the machine, getting the tools ready, programming the CNC, and running the first test pieces. That setup cost is pretty much the same whether you are making one gear or a thousand. So when you order a small quantity, that setup cost gets spread over just a few parts, which means the price per piece is higher. When you order a larger quantity, the setup cost gets spread over many parts, and the price per piece goes down.

So what does that look like in real numbers? For a prototype or a single piece, you will pay more per part than someone ordering five hundred pieces. That is just how manufacturing works. But we are not trying to punish small orders. We understand that sometimes you just need one part to test a design, or you need a small batch for a repair job. That is fine with us. We will quote you a fair price for whatever quantity you need, and you can decide if it works for your budget.

Here is another thing worth knowing. For some specific projects, there might be a minimum if the material is hard to find or if the tooling is expensive. Let us give you an example. If you need a gear made from a very unusual alloy steel that we have to specially order from a mill, that mill might have a minimum purchase quantity. Or if your gear requires a custom cutting tool that costs a few thousand dollars to make, we would need to make enough parts to cover that tool cost. But those cases are not the norm. For regular materials and regular splines or gear teeth, there is no minimum.

For prototypes and samples, we are very flexible. One piece is fine. We can make it from your drawing or even from a sample you send us. That way you can test the fit and performance before you decide on a larger order. Many of our customers start that way – one or two pieces first, then fifty, then a few hundred. That is a smart way to work, and we support it fully.

For production runs, any quantity works. If you need fifty pieces, we will run fifty. If you need two thousand, we will run two thousand. If you need five hundred this month and another five hundred next month, that is fine too. We do not lock you into a big order just to get a good price. We tell you the price per piece for your quantity, and you decide what makes sense.

So the short version is – do not worry about MOQ. Tell us how many you need, and we will give you a fair price. Small orders are welcome. Large orders get better per piece pricing. But either way, we will make your parts.

Typical lead time for custom gears range from 30-70 days normally, though complex or large-volume projects may take 60-80 days or more.

Several factors influence this timeline.

• First, the gear type (e.g., spur, helical, bevel, or worm) and material (steel, brass, plastic, or exotic alloys) determine machining difficulty.
• Second, the manufacturing process—hobbing, shaping, grinding, or 5-axis CNC milling—impacts speed; grinding for high-precision gears adds significant time.
• Third, heat treatment and surface finishing (e.g., carburizing, nitriding, or phosphate coating) require additional days.
• Fourth, tooling availability: standard cutter stocks shorten lead times, but custom-designed hobs or form tools extend them.
• Finally, quality assurance steps like coordinate measuring machine (CMM) inspection and gear metrology reports add 2–5 days. For urgent needs, many shops offer expedited services (e.g., 2-week rush) at a premium.

To avoid delay, we suggest you prepare order in advance so as to save enough time for production.

That is a great question, and it is something we think about every single day. We do not just make gears and hope they are right. We have a whole system in place to check our work at every step. Let me explain how it works.

First, we are certified under ISO 9001:2015. That is an international quality management standard. What does that mean in plain language? It means we have written procedures for everything we do – from the moment we get your order to the moment we ship your gears. We follow those procedures every time. And we get audited by outside inspectors regularly to make sure we are actually doing what we say we do. So the ISO certification is not just a piece of paper on the wall. It is proof that we take quality seriously.

But let me tell you about the actual steps we take to make sure your gears are right.

• It starts with the raw material. When we receive steel from our supplier, we do not just assume it is good. We check the material certification that comes with it – that is the mill test report I mentioned in another FAQ. We also do our own checks, like hardness testing and sometimes even chemical analysis, to make sure the steel matches what we ordered. If the material is wrong, nothing else matters. So we catch problems early.
• Next comes the machining. This is where we cut the gear teeth. Our machines are CNC controlled, which means they follow a program very precisely. But we do not just set them up and walk away. Our operators check the first piece that comes off the machine – we call it a first article inspection. They measure the critical dimensions to make sure everything is on target. If something is off, they adjust the machine before running the rest of your order.
• During production, we do in-process checks. That means we pull gears off the line at regular intervals and measure them. This helps us catch any drift in the machine before it becomes a big problem. If we see a dimension starting to move, we stop and fix it.
• After the gears are machined, they go to heat treatment. This is a critical step. We track the temperature and time carefully, and we record everything in a heat treatment report. After heat treatment, we test the hardness of every batch. We use a hardness tester that pushes a small indent into the metal and measures how hard it is. If the hardness is not within the range we specified, the batch gets rejected.
• Then comes grinding, if your gears need it. Grinding is a very precise process, and we check dimensions again after grinding. We use electronic gauges and measuring tools that are calibrated regularly. If a tool is out of calibration, we do not use it until it is fixed.
• Finally, we do a final inspection before the gears are packaged. This is where we check everything against your drawing. We measure the dimensions, we check the gear teeth accuracy, and we sometimes do a meshing test with a master gear. Only when everything passes do we clean the gears, package them, and get them ready to ship.

We also keep records. Every inspection result gets written down. If you ever ask for reports, we can pull them from our files. And if something goes wrong down the road, we can go back and see what we measured on that batch.

So the short answer is – we use our ISO 9001 system, we check material before we start, we inspect during production, we test after heat treatment, we do a final inspection before shipping, and we keep records of everything. That is how we make sure your gears are good quality.

Lead times for custom gears depend on several factors: gear complexity (type, tooth geometry, precision grade), material availability, quantity, required heat treatment and finishing processes, and current shop load. In spite of the above-mentioned factors, we provide the following general guidelines:

Prototype gears: For new design, if you don’t need custom tooling, lead time is around 50 days assuming no specialized tools are required. If special tooling is required, around 60-70 days, depending heavily on the design and processing needed.

For lapping bevel gears, around 45-50 days, grinding bevel gears: around 50-60 days, cylindrical gears: around 45-60 days, worm gears: around 45-60 days.

Factors that may extend lead time: special materials, large gear diameters and qty, complex heat treatment schedules, or surface coating or phosphating. We will provide lead time in our sales confirmation, and we update you weekly production progress.

For long term contracts, we can discuss to have safety stock to support in-time delivery.

To get an accurate lead time for your specific gear, simply request a quote with your drawing and required quantity.

Please rest assured completely. Belon has successfully obtained ISO 9001:2015 Quality Management System Certification, and our entire production and inspection processes are strictly executed in accordance with standardized protocols.

From the moment raw materials enter our facility to the final packaging and shipment of finished goods, we maintain rigorous control over all critical technical parameters of our gears, meticulously overseeing every single detail. Upon the completion of each production batch, we conduct comprehensive testing and issue a formal inspection report to ensure that the finished products fully comply with the technical specifications agreed upon by both parties.

Consequently, you can be absolutely certain that there will be no issues regarding inconsistent quality.

If the final product fails to meet the technical and quality standards agreed upon with you, we will immediately provide solutions such as rework, re-production, or refund, thereby comprehensively safeguarding your legitimate rights and ensuring a positive collaborative experience. This service commitment is clearly published on our official website and in our product brochures; it is not merely an empty promise.

As one of the top ten gear manufacturing enterprises in China, we have always highly valued our brand reputation and would never compromise our hard-earned credibility for the sake of a single order. Since our inception, we have consistently prioritized customer needs as our starting point and aimed for 100% customer satisfaction as our ultimate goal, dedicating ourselves wholeheartedly to making every collaboration a success.

Yes, trial orders for testing first are totally acceptable for us and we fully support this way of cooperation. Many of our clients choose to start with sample orders for trial and testing first and then establish trust and long-term cooperation business relationship with us after carefully checking high quality of our gears and shafts. By placing trial order first, you can check our product quality, precision and workmanship in advance. Please feel rest issued that we will make the gear samples strictly following your drawings and technical standards, and deliver them to you promptly. After you confirm the samples meet your requirements, we can then move on to formal bulk orders smoothly.

As we specialize in customized gear & shaft project, there is no strict MOQ on our side. We fully understand that you may have diverse procurement needs at different stages. Whether it is small-batch production or bulk orders, we can accept and arrange production properly according to your actual demand quantity. Our technical and production department will flexibly arrange the production schedule, process every order carefully and deliver qualified products strictly in accordance with your requirements. In the process of gear & shaft manufacturing, we adhere to strict production standards throughout every procedure, handle each order no matter big or not with great care, and ensure all finished goods fully comply with your technical specifications, quality standards and required delivery quantity.

• Requirement Communication (Providing drawings or samples, and details confirmation with our engineer team)
• Start Production of Samples
• Sample Delivery/ Bulk Production

As a manufacturer specializing in customized gear solutions, we do not set a strict minimum order quantity. In addition to mass production, we also welcome small-batch and prototype orders for testing, validation, and collaborative development.

The typical lead time for customized gear production is 4–8 weeks, including material preparation, manufacturing, inspection, and packaging.
Lead time may vary depending on order quantity and production processes. Expedited service is available upon request.