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Inside a 24-part planetary gear motor modelled in DesignX
The gear motor on our home page is a real DesignX model: a NEMA 23 stepper on a 5:1 planetary gearbox, 24 parts and 101 features, with smooth gear teeth that mesh, checked for clashes.
The drawing that plays at the top of our home page isn’t an illustration. It is drawn from a real DesignX model, a compact planetary gear motor, using the kernel’s own hidden-line projection. This one was modelled with DesignX’s features (from a script that drives the same features you use), not by Genie. Here is what’s inside.
The design
- A NEMA 23 stepper driving a 5 : 1 planetary gearbox, module 1: a 12-tooth sun on the motor shaft, three 18-tooth planets on pins, and a 48-tooth ring gear that is also the housing.
- A carrier with the output shaft and a keyseat, running in two 6002 bearings, with a seal and an output flange.
- Standard fasteners: four M5 screws hold the motor and four M4 screws hold the gearbox together.
- 24 parts and 101 features, 151 mm long overall.
How it was built
The gear teeth are drawn from true arcs, so the tooth flanks are smooth faces rather than facets, and every gear is turned so that its teeth sit in the gaps of its neighbours. The ring gear starts as a sketch:
In the assembly, each instance shows its own part. Exploding it opens the whole stack along its axis, and it closes back exactly:
Checked like a real product
Every part builds on the kernel, and the gears mesh. A clash check over all 24 parts finds no overlap anywhere except the screws’ threads in their tapped holes, which is exactly where metal is supposed to meet.
Try it: start an assembly from your own parts, or ask Genie for a product in Product mode and open the assembly it makes.
