Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
28BYJ-48 Outboard Bearing Drive Bracket
Bracket that bolts a 28BYJ-48 geared stepper (35 mm ear spacing, 5 mm flatted shaft offset 8 mm from the body) to a vertical plate and carries a 625 bearing (16 mm press pocket) in a second upright 50 mm away, so a 5 mm steel output shaft takes the side load instead of the motor's thin shaft. A 30 mm snap-off coupler with two 5.3 mm bores and M3 self-tap set screws joins the motor flat to the output shaft; the ear slots are 4.5 x 7.5 mm so the motor slides until the coupler spins freely. Base 80 x 44 x 4 mm with four M3 holes at 62 x 26 mm.
5-to-8 mm Set-Screw Shaft Coupler
A 20 mm OD x 34 mm rigid coupler joining a 5 mm NEMA 17 motor shaft (5.2 mm bore) to an 8 mm rod or T8 leadscrew (8.2 mm bore). A 3 mm internal wall stops both shafts, and each end is clamped by an M3 set screw threaded into a captured M3 hex nut.
5 mm D-Shaft To 1/2 in Hex Coupler
A rigid coupler that joins a 5 mm motor shaft (NEMA 17 D-shaft or a flatted gearmotor output) to a 1/2 in (12.7 mm) hex axle. Each side has two captured M3 nut set screws, so it works with any flat depth. It's 26 mm OD and 44 mm tall, with a 20 mm deep 12.9 mm across-flats hex socket and a 5.2 mm bore. You can drive FRC/VEXpro-style hex wheels and gears from a hobby motor without buying a metal adapter.