Print-ready 3D models

Servo Horn To 8 mm Shaft Hub

A pinch-clamp hub that adapts any screw-on servo horn, disc or small wheel to a plain 8 mm shaft — the 44 mm flange carries four radial M3 slots spanning an 18–34 mm bolt circle, so it fits round and 4-arm horns without guessing their hole pattern. The 22 mm boss has an 8.3 mm slip-fit bore with 27 mm of shaft engagement, split by a 2.2 mm pinch gap closed by a single M3 screw and captured nut; 45° gussets tie the boss to the flange and the clamp ears ramp at 45° so the whole thing prints flat on the flange with no supports. Overall 44 mm diameter x 34 mm tall.