Swivel castor wheels with 608 (skateboard) bearings

thingiverse

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!