Count first
Record the sun, planet and ring tooth counts and the number of planet gears.
Measure the interface
Capture bore/spline, shaft journals, shoulders, keyways, threads and retention features.
Do not infer tooth geometry from OD alone
Outside diameter is useful, but module/DP, pressure angle and profile shift need independent confirmation.
Photos help, measurements control
Send photos for identification context together with measured dimensions and the mating components.
Use the drawing as the controlled record
A technical guide can explain which variables matter, but the final sun gear must be approved from the actual drawing and operating requirement.
If a value is missing, identify it for confirmation instead of copying a dimension or material from a different supplier or gear family.
RFQ checklist
Send the sun gear drawing or measured tooth data, mating planet/ring information, interface dimensions, material/process requirements, duty, quantity and destination.
