Slewing Ring S5

This very big slewing ring is designed for LEGO technic using steel balls and prototype plastic part. All holes can be tapped and used to attach Lego parts with M3 screw. The steel balls used have a diameter of 3.45 mm. The tooth of the gear have a modulo 1 and the center position of this are compatible with the others Lego gears. This model is very strong (double-raw balls) and perfect for big cranes. I test it (model prints with ABS material) with a payload of 25 kg!