How to find the right Mechanical Internal Gears AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Mechanical Internal Gears
- Tooth count difference
- Keep the tooth difference between internal gear and pinion within the manufacturer's stated minimum Too small a difference causes involute or trochoid interference and the gears will not assemble or run.
- Pitch and pressure angle
- Match the module/DP and pressure angle of the pinion exactly A mismatch prevents correct meshing.
- Mounting form
- Check whether it is a ring for press-fitting, has bolt holes, or is part of a housing, and confirm the outside diameter tolerance Internal gears are usually fixed into a housing, so the outside dimensions matter as much as the teeth.
- Application
- For planetary sets, buy the sun, planets and ring as a designed set Planetary geometry imposes assembly conditions on tooth counts.
Brands that matter
- KHK (Kohara Gear): One of the few broad stock lines of metric internal gears.
- SDP/SI (Stock Drive Products): Small internal gears for instruments and light drives.
- Misumi: Metric internal gears for machine building.
What to avoid
- Choosing a pinion close in size to the internal gear without checking interference limits.
- Mixing planetary components from different sets.