Swivel castor wheels with 608 (skateboard) bearings by AS_Motion_Lab

Last crawled date: 3 years ago

These castors are self-steering, providing smooth roll in any direction, and use common 608 skateboard bearings for radial and axial load.
For 1 full castor you need:
1x 3d printed wheel
1x 3d printed castor body
2x 3d printed bearing flanges.
4x 608 series (skateboard) bearings.
2x washers either side of the wheel bearings (2mm of thickness either side).
1x m8 axle bolt/rod (approx 60mm) for the wheel.
1x m8 threaded rod for the swivel axis, length to suit your application. Best to use high tensile or stainless rod for strength.
8x wood screws to attach the bearing blocks to your structure. I use phosphated drywall screws because they have a real grippy texture and sharp thread.
several M8 nuts to screw it all together, depending on whether you use bolts or threaded rod.
Recommended to print in ABS or something durable and strong - the wheels will suffer from wear the most.
The tolerances are tuned to my printer - so they might be a little loose if your printer is calibrated to be 100% dimensionally accurate.
For example - the bearing bores are 22.2mm which is about 0.9% oversize. I found on my printer after ABS shrinkage, the bearings press in under light finger pressure.
Please print a sample wheel/flange first!