New: the Cycloid Drive 25:1. Free STL + STEP files for a 3D-printed NEMA17 gearbox.Get the free files
Parts catalogue

Parts we actually use.

Every part here is one we bought for our own builds. Items marked with a build are in that build's bill of materials. Specs that matter (sizes, tolerances) are in each name.

As an Amazon Associate I earn from qualifying purchases. Buying through these links costs you nothing extra and supports the free files.

Motors & electronics

Steppers, drivers and sensors that run our mechanisms.

Bearings

Standard deep-groove bearings our printed parts are sized around.

Pins & dowels

Ground steel pins for ring pins, shafts and pivots.

Screws & inserts

Metric screw kits and heat-set inserts for printed assemblies.

Filament

What we print functional parts in.

Tools & workshop

Bench tools we actually use.

Prices and availability are set by Amazon and can change. Product names belong to their owners; a link is not an endorsement by the seller.