Swivel castor wheels with 608 (skateboard) bearings

thingiverse

These castors are self-steering, offering smooth roll in any direction and utilizing common 608 skateboard bearings for radial and axial load. For one complete castor you need: - One 3D printed wheel - One 3D printed castor body - Two 3D printed bearing flanges - Four 608 series (skateboard) bearings - Two washers on either side of the wheel bearings, each 2mm thick - One M8 axle bolt or rod, approximately 60mm long, for the wheel - One M8 threaded rod for the swivel axis, suitable to your application; high tensile or stainless steel is recommended for added strength - Eight wood screws to attach the bearing blocks to your structure, using phosphated drywall screws with a grippy texture and sharp thread for optimal results - Several M8 nuts to secure everything together, depending on whether you use bolts or threaded rod It's highly advised to print in ABS or a similar durable material, as the wheels will undergo significant wear. The tolerances are calibrated to my printer settings - so they might be slightly loose if your printer is 100% dimensionally accurate. For instance, the bearing bores are 22.2mm, about 0.9% oversized; after ABS shrinkage, I found that the bearings fit under light finger pressure on my printer. I recommend printing a sample wheel/flange first!