Gear Cutting & Power Skiving
Spur and helical teeth with accessible blank geometry.
Custom internal ring gears for planetary reducers, wheel-end drives and compact transmissions. Send your tooth data, mounting dimensions and mating-part drawings for review.

An internal gear has teeth on the inside of a ring. In a planetary arrangement, it meshes with external planet gears and helps create a compact reduction stage. A ring may also carry a mounting flange, bolt circle, outside locating surface or other housing interface.
Our range includes agricultural wheel-end rings, planetary reducer rings and related transmission parts. The relationship between internal teeth and outside mounting features is important for correct alignment in the assembly.



Include these details with your drawing so we can assess manufacturing, inspection and quotation requirements.
| Review item | What to define |
|---|---|
| Internal tooth geometry | Tooth count, module, pressure angle and spur/helical definition. |
| Mating components | Planet and sun drawings, assembly ratio and available engagement clearance. |
| Mounting features | Flange thickness, bolt circle, locating diameter and face datums. |
| Ring condition | Material, hardness, treatment and allowable distortion after processing. |
| Acceptance | Tooth inspection method, concentricity and assembly-related checks. |
Share your dimensions, material, accuracy requirements and order quantity. We confirm the manufacturing options and delivery requirements for your specific part.
Internal cutting requires a suitable tool-access and workholding plan. The YK8132 power skiving machine in the manufacturing base is relevant to discussing applicable internal gear work. Ring stiffness, tool clearance and heat-treatment movement are reviewed before the machining and finishing sequence is agreed.
View inspection and quality documentationSpur and helical teeth with accessible blank geometry.
Journal fits, shoulders and integrated transmission features.
Profile, lead, pitch or other characteristics specified for the part.
Internal teeth relative to the specified outside or flange datum.
Roundness, mounting-face relationship and critical wall dimensions.
Mating tooth data and any defined backlash or meshing checks.
Travel, slewing and enclosed reduction drives.
View application requirementsCompact rings surrounding a sun-and-planet stage.
View application requirementsWheel-end and gearbox reduction components.
View application requirementsWhere tooth compatibility or assembly backlash is part of the requirement, send the mating planet data and the assembly reference.
The ring is located by those interfaces in the housing. Their relationship to the tooth system affects alignment and meshing.
These are custom-manufactured parts. Send your dimensions, material and quantity so we can quote the required part and delivery requirements.
Share your drawing, quantity and application. We will review the manufacturing and inspection requirements, then contact you to clarify any details needed for a quotation.