This internal spur gear is made as the ring gear in a planetary drive system. The teeth are cut on the inside diameter, matching the planet gears that roll through it. We machine these from forged steel or alloy blanks, then heat treat and harden the tooth surface for wear resistance. The gear is designed to fit inside your reducer housing, with the internal teeth precisely spaced to ensure even load sharing across all planets.
Internal Spur Gear For Planetary Speed Reducer
Specification
Module
4.5
Application
Planetary speed reducer
Material
42CrMo4
Heat Treatment
Quenching, Tempering & Nitriding
Accuracy
DIN 8
Typical Applications Of Internal Spur Gear
This internal spur gear is commonly used in planetary speed reducers for wheel drives, swing drives, and winch gearboxes on mobile machinery like excavators, cranes, and forklifts. You also find it in industrial equipment such as conveyor drives, mixer gearboxes, and automatic packing machines. In wind turbines, it serves as the ring gear in the pitch and yaw drive reducers. For robotics and servo applications, ground internal gears provide the precision and low backlash needed for positioning. Basically, anywhere you need high torque in a compact space, this gear does the job.
Production process
5-Step Production Process
Tube Forging
Turning
Internal Gear Shapping
Heat Treatment
Ring Gear Grinding
Tube 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.
Internal Gear Shapping
Gear shaping is a gear cutting process that used cutting tool that is essentially a “master gear” reciprocates while meshing in a synchronized rolling motion with the gear blank.The cutter is usually moving up and down.
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.
Ring Gear Grinding
Gear Grinding is the the most common high-precision method for finishing hardened gears under gleason profile. There are two methods to use an abrasive grinding wheel removes material from the tooth flanks.
Inspection
Strict Quality Inspection
Dimension Inspection
Material Testing
Heat Treatment Testing
Accuracy Inspection
Dimension Inspection
Material Testing
Heat Treatment Testing
Accuracy Inspection
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
Do you have drawings to be implemented, or problems to be solved? Please feel free to contact us. From initial inquiry and technical specification confirmation to production and delivery, our dedicated team will provide you with one-on-one service, ensuring that every step meets your stringent requirements for precision.
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