Mating planet gears
Confirm the mating tooth count, pitch system and pressure angle rather than identifying the sun gear in isolation.
Sun gears with through-bores or hollow interfaces for compact coaxial planetary arrangements.

| พารามิเตอร์ | สิ่งที่ต้องระบุ |
|---|---|
| Tooth geometry | Module/DP, pressure angle, tooth count and any profile shift. |
| Bore | Diameter, fit, keyway/spline if present and axial length. |
| Wall / hub geometry | Section thickness, shoulders and retention features. |
| Mating components | Planet gear and ring gear data. |
| Material / heat treatment | Per application and drawing. |
| การตรวจสอบ | Bore-to-tooth concentricity and required tooth measurements. |
These are the questions to close before production.
Confirm the mating tooth count, pitch system and pressure angle rather than identifying the sun gear in isolation.
Define the datum relationship among gear teeth, bore/spline/shaft and bearing seats.
Rated and peak torque, speed, reversals, shock and life influence material/process decisions.
Agree the report content before production when tooth or interface verification is critical.
Sun gears with through-bores or hollow interfaces for compact coaxial planetary arrangements.
For replacement hollow sun gears, verify bore fit, bore-to-tooth concentricity and the mating planet/ring geometry together. Photos can show the arrangement, but the controlled measurements determine interchangeability.

A large through bore or internal spline reduces the remaining section between the center feature and tooth root, so duty, wall thickness and distortion should be reviewed together.
For hollow sun gears, freeze the external tooth system and the bore or internal spline as one section before selecting the process route. The remaining wall thickness and gear-to-bore concentricity are central to the part definition.
If material and heat treatment are already specified, preserve them. If the bore size or internal feature is being changed, include torque and duty information so the effect on section strength and distortion can be reviewed.

Verify tooth system and mating planetary geometry.
Verify bore/spline/shaft fits, datums and retention.
Verify material, heat treatment, finishing and coating requirements.
Verify tooth, runout, dimensional and documentation requirements.
Send the drawing, tooth data, mating-component information, duty and quantity. We will review the interface before quotation.