Ratio is only one part of selection. Torque, input speed, duty, backlash and output load determine whether a planetary stage is suitable.

What engineers should confirm

Planetary gearing should be selected as a complete load path rather than by ratio alone. Confirm continuous and peak torque, input speed, duty cycle, required ratio, backlash target, mounting orientation and the radial or axial load acting at the output.

Data for replacement or custom manufacture

Provide an existing model or nameplate when available. For custom gears, include tooth count, module or diametral pitch, pressure angle, helix data, face width, bore or spline, material, heat treatment and the mating component information. A dimensioned drawing or representative sample reduces compatibility risk.

Inspection and release

Final inspection scope can include dimensions, runout, tooth geometry, hardness, contact condition and material documents when specified in the RFQ. Acceptance criteria should be agreed before production.