Internal Gear

Why Choose BELON As Your Internal Gear Manufacturer
As one of the leading internal gear manufacturers in China, BELON produces custom internal gears with precise tooth geometry and consistent quality tailored to different transmission applications.
BELON provides a wide production scope for internal gears ranging from Module 0.2 to heavy-duty Module 45. We utilize a variety of advanced manufacturing methods, including powder metallurgy, gear shaping, gear broaching, power skiving and gear grinding. From prototype samples to mass production, we keep gear quality consistent and control machining, heat treatment, gear finishing, and inspection to maintain stable performance across every batch.
Whether you need internal gears for planetary gear systems, reducers, or other compact transmission assemblies, our engineering team can work from drawings, samples, or application requirements to make the best gear design and manufacture strictly to your drawing/sample/technical specs. With flexible production capabilities and rigorous quality control, BELON aims to be your long-term internal gear manufacturing partner—not just a one-time supplier.
Internal Gears are belonging to Cylindrial Gears. The difference comparing to spur gears and helical gears are the teeth been cut on the inner surface. They typically mesh with a smaller external gear known as a pinion gear or a planet gear. Its greatest advantage is enabling highly efficient, high-torque transmission within a confined space.
Features:
(1) When meshing two external gears, the rotation occurs in the opposite directions. When meshing an internal gear with an external gear the rotation occurs in the same direction.
(2) Care should be taken with regard to the number of teeth on each gear when meshing a large (internal) gear with a small (external) gear, since three types of interference can occur.
(3) Usually internal gears are driven by small external gears.
(4) Allows for a compact design of the machine.
BELON provides wide range of internal gears from Module 0.2 to heavy-duty Module M45. BELON utilize a variety of advanced manufacturing methods, including, Powder Metallurgy, Gear Shaping, Gear Broaching, Power Skiving and Gear Grinding. When you begin your journey with BELON, we focus on understanding your application and needs, which allows us to match you with the most suitable, tailor-made gear solutions—combining performance, precision, and economy for your success.
Internal Gear Production Capabilities
Internal Gear Size:
Helical Ring Gear Housing for Gearbox
- Material: 42CrMo4
- Heat treatment: Tempering and quenching 285 – 310 HBW
- Accuracy: DIN6
Ring Gear Used In Agricultural Gearbox
- Material: 20CrMnTi
- Heat treatment: Carb. Case hardened
- Accuracy: DIN 6
Internal Gear Ring For Heavy-Duty Planetary Gearbox
- Material: 42CrMo4
- Heat treatment: Tempering and quenching 285 – 310 HBW
- Accuracy: DIN 6
Planetary Gearbox Ring Gear
- Material: 42CrMo4
- Heat treatment: Quenching + Tempering + Nitriding
- Accuracy: DIN 6
Power Skiving Gear For Planetary Gearbox
- Material: 20CrMnTi
- Heat treatment: Quenching + tempering + Carburizing
- Accuracy: DIN6
Ring Gears For Planetary Gearbox
- Material: 20CrMnTi
- Heat treatment: Case carburizing
- Accuracy: DIN 6
Internal Spur and Helical Gear for Planetary Speed Reducer
- Material: 42CrMo4
- Heat treatment: Case harden+ Nitriding 50±2HRC
- Accuracy: DIN 6
Internal Helical Gear For Planetary Gearbox
- Material: 42CrMo4
- Heat treatment: Case harden+ Nitriding 50±2HRC
- Accuracy: DIN 6
Ring Gear Used in Electric Winch Motor
- Material: 42CrMo
- Heat treatment: Quenched & Tempered to core hardness28-32HRC+Gas Nitriding
- Accuracy: ISO 8
Internal Gear For Winch Motor Pack
- Material: 42CrMo
- Heat treatment: Tempering & Quenching & Gas Nitriding
- Accuracy: ISO 8
Internal Ring Gear for Planetary Gearbox
- Material: 42CrMo
- Heat treatment: Nitriding 52-55HRC
- Accuracy: DIN 6
Precision Internal Gear for Planetary Gearbox
- Material: 42CrMo4
- Heat treatment: Tempering and quenching 285 – 310 HBW
- Accuracy: DIN 6
Helical Ring Gear Housing For Robotics Gearbox
- Material: EN19
- Heat treatment: Hardening & Tempering & Nitriding
- Accuracy: DIN6
Small Internal ring gear by power skiving for robotics dogs
- Material: 42CrMo
- Heat treatment: Tempering & Quenching & Nitriding
- Accuracy: ISO7
Internal Spur Gear For Planetary Speed Reducer
- Material: 42CrMo4
- Heat treatment: Quenching, Tempering & Nitriding
- Accuracy: DIN 8
Helical Internal Gear Housing For Planetary Reducers
- Material: 42CrMo T
- Heat treatment: Nitriding
- Accuracy: DIN 6
Internal Gear Used In Planetary Gearbox
- Material: 42CrMo4
- Heat treatment: Quenching and Tempering
- Accuracy: DIN 8
Ground Ring Gear For Planetary Gearbox In Sugar Mill
- Material: 42CrMo4
- Heat treatment: QT285 – 310 HBW
- Accuracy: DIN6
DIN 5 Precision Ground Ring Gear For Planetary Gearboxes
- Material: 42CrMo4
- Heat treatment: QT285 – 310 HBW
- Accuracy: DIN5
Precision Internal Gear By Power-skiving
- Material: 16MnCr5
- Heat treatment: Carburizing & Quenching
- Accuracy: DIN5
Internal Gear Partner

























