Linner Gears manufactures custom internal ring gears and internally toothed components to customer drawings for planetary gear systems, reducers, and compact transmission assemblies. We review tooth geometry, mating pinion data, materials, heat-treatment requirements, tolerances, quantities, and inspection needs before production. See our manufacturing capabilities and inspection approach.
Internal Gear Types We Manufacture
Internal Spur Gears
Straight-tooth internal gears manufactured to drawing with specified module or diametral pitch, pressure angle, tooth count, pitch diameter, face width, and mounting features.
Planetary Ring Gears
Custom ring gears for planetary gearsets, reducers, and compact coaxial transmissions, reviewed with sun and planet gear data where available.
Flanged & Integrated Ring Gears
Internally toothed components with flanges, bolt patterns, outside diameters, shoulders, and other mounting features machined to customer specifications.
Internal Ring Gear Specifications We Review
Tooth & Mating Gear Data
- Module or diametral pitch
- Internal tooth count and pressure angle
- Pitch diameter, outside diameter, face width, and rim thickness
- Profile shift, backlash, runout, and concentricity
- Sun, planet, or mating pinion information
Application & Production Requirements
- Torque, speed, duty cycle, and operating direction
- Material, hardness, heat treatment, and surface finish
- Lubrication, temperature, corrosion, and service environment
- Required gear accuracy, inspection method, and documentation
- Prototype or production quantity and target delivery schedule
Materials and Applications
Material Considerations
- Carbon and alloy steel
- Stainless steel
- Bronze and aluminum where appropriate
- Engineering plastics for lightweight or low-noise applications
- Hardness, heat treatment, coating, and surface finish
Typical Applications
- Planetary gearboxes and gearheads
- Robotics and servo actuators
- Industrial reducers and compact transmissions
- Automation and indexing systems
- Custom OEM drive assemblies
Discuss Your Internal Ring Gear Requirements
If your assembly also needs custom pinions, send drawings or specifications for both components. Include material, quantity, tolerances, operating conditions, and inspection requirements so we can review the fit and quote them together.