This helical gear uses 18CrNiMo7-6 material, a high-end carburized alloy steel. After carburizing, the surface hardness reaches a stable 60HRC, making the tooth surface extremely wear-resistant. It is not prone to pitting, wear, or spalling during long-term high-speed, heavy-load operation. Simultaneously, the steel’s internal toughness is maximized, making it less susceptible to tooth root fracture under the enormous impact loads of heavy trucks, agricultural machinery, and high-power electric vehicles during starting, climbing, and sudden braking. Deformation after heat treatment is also minimal, thus achieving a high precision level of 6.
Precision Helical Gear
Specification
Module
4.5
Application
Gearbox
Material
18CrNiMo7-6
Heat Treatment
Case hardened (carburized) 60HRC
Accuracy
Grade 6
Helical Gears For Gearbox
Helical gears have certain advantages over spur gears in gearbox compatibility.
- First, the helical gear teeth have a progressive helical meshing surface, and more tooth pairs participate in the meshing, resulting in less vibration and impact.
- Second, the helical gear meshing is a long-line contact, which allows for a higher torque capacity than spur gears of the same volume and module.
- Finally, the stress distribution on the helical gear tooth surface is more uniform, with less local stress concentration, so its service life is slightly longer than that of spur gears.
Production process
6-Step Production Process
Forging
Turning
Gear Cutting
Heat Treatment
ID & OD & Surface Grinding
Tooth Grinding
Forging
When gears need high performance that needs to withstand high loads, high stress, impact loads or fatigue loads, forgings are suggested to use. Forging allows metal fibers to be continuously distributed along the gear profile, significantly improving root strength and fatigue life.
Turning
This is the process of cutting and shaping solid materials into precise parts. It uses tools like lathes, mills, and drills to remove excess material. Machining transforms a simple block of metal into a finished, functional component.
Gear Cutting
Gear Cutting includes all processes to create gear teeth after rough or fine machining. It shapes teeth to ensure smooth and efficient power transfer for performance, strength and cost efficiency.
Heat Treatment
Gears need to be running with two gears or above two gears, that makes them easy to be worn-out. That’s why most types of gears need to be harden through heat treatment.
ID & OD & Surface Grinding
ID grinding, OD grinding, Surface grinding are all belonging to CNC grinding which are the foundational precision abrasive machining processes used to achieve exceptional dimensional accuracy and surface finishes, especially on hardened materials.
Tooth Grinding
Tooth Grinding are the final processes are applied after heat treatment to correct distortion, improve geometry, and achieve the final surface finish necessary for quiet, efficient power transmission.
Inspection
Strict Quality Inspection
Dimension Inspection
Material Inspection
Heat Treatment Testing
UT & MT Testing
Meshing Testing
Accuracy Testing
Dimension Inspection
Material Inspection
Heat Treatment Testing
UT & MT Testing
Meshing Testing
Accuracy Testing
Packages
Professional Packaging Safe Arrival
Customized cost-effective packages for products protection. We select multi-model solutions, combining air, sea, or land freight for the optimal balance of cost, speed, and reliability.
Inner Package
Out Package
Carton
Wooden Package
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Your Precision
Transmission Partner
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