Internal Ring Gear CNC Milling Parts Planetary Gearbox Components Custom spur gear manufacturer

These internal ring gears carry the internal tooth form of planetary gearboxes, enclosing the planet gears within a compact, rigid ring. CNC milling of the internal teeth allows complex geometry and precise profile control that is difficult to achieve by other methods, keeping the gear set compact, strong and quiet in operation.

Accurate internal teeth and concentric bores keep all planets meshing evenly with the ring, distributing load and minimising noise. Verified tooth profile and pitch ensure consistent backlash, so the gearbox runs smoothly and repeats position reliably over a long service life. Our engineers will confirm the module, tooth count and heat treatment that best match your planetary gearbox design.

• Precise Internal Teeth: CNC milling gives accurate internal profile and geometry control.
• Even Planet Meshing: A concentric ring keeps all planets engaged and load shared.
• Compact Rigid Ring: A strong ring encloses the gear set within a small envelope.
• Consistent Backlash: Verified profile and pitch keep play predictable.
• Heat Treated Strength: Hardening options resist wear in high-load gearboxes.
• Custom Sizes: Internal diameter and tooth count produced to your design.

Used in planetary gearboxes, winch reducers, hub drives and automation transmissions that require a compact ring gear.

They also serve aerospace actuators, robotics and heavy machinery where rigid, precise internal gearing is essential.

Ring gears are rust-protected, cushioned and packed in partitioned cartons to protect the internal teeth during handling.

Each shipment includes an ISO 9001:2015 certificate and inspection report, with a twelve-month guarantee against manufacturing defects.

Custom labelling, protective sleeving and reinforced cases are offered to suit your handling and storage requirements.