Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
8 mm Shaft Three-Dog Jaw Clutch Half
This is a jaw clutch half with three square dogs, for an 8 mm shaft. Print two identical copies, flip one over and turn it 60° so the two sets of dogs mesh. You get positive drive in both directions, and sliding one half back disengages it, so you can free-spool a winch, a hand crank or a robot drive. Each half has an 8.3 mm slip-fit bore, an M3 grub screw locked by a captured nut, and a 52 mm flange with four 3.4 mm holes on a 40 mm circle for bolting on a gear, pulley or drum.
Twin-Flange Line Drum
Part of the 'N20 Self-Locking Worm-Drive Winch' kit. This 57 mm long spool has a 30 mm drum between two 42 mm flanges. It slides onto the kit's 8 mm steel axle (8.3 mm bore) and bears on a 608 bearing's inner race through an 11 mm shoulder. It takes three M3 heat-set inserts (4.0 x 8 mm bores on a 22 mm PCD) for the 24T worm wheel's M3x16 screws, plus an M3x8 grub screw and captured M3 nut in the 16 mm hub. The line anchors through a 2.5 mm radial hole into the hollow core or through a 2.5 mm hole in the flange.
24T Winch Worm Wheel
A module 1.5, 30° pressure angle, 24-tooth worm wheel for the 'N20 Self-Locking Worm-Drive Winch' kit. It has a 39 mm OD, a 10 mm face and a 16 x 10 mm hub, with an 11 mm shoulder that bears on the 608 inner race. The 8.3 mm bore slip-fits the 8 mm steel axle, and an M3x8 grub screw with a captured M3 nut locks it. Three M3x16 screws on a 22 mm PCD bolt it to the line drum's heat-set inserts.
Module 1.5 Winch Worm
This is the self-locking worm for the 'N20 Self-Locking Worm-Drive Winch' kit. It is a single-start, right-hand, module 1.5 worm: 15 mm OD, 12 mm pitch diameter, 4.712 mm lead and a 7.1° lead angle. It has a 16 x 10 mm collar with a 3.1 mm bore, 10 mm deep, for the N20 3 mm D-shaft, which an M3x8 grub screw and captured M3 nut hold. Its 4 mm tail pin runs in a 624 bearing (4 x 13 x 5 mm). The overall length is 39 mm, and it prints standing on the collar face.
8 mm Rod One-Way Ratchet Clutch
A print-in-place one-way ratchet clutch: a 70 x 70 mm base plate (4x M4 clearance holes on a 57 mm square) carries a toothed housing, and a knurled Ø64 mm knob-hub rides inside it on three flexure pawls — turn it clockwise and it clicks over 21 teeth (17.1° per step), turn it back and the pawls lock against the steep flanks. The hub takes an 8 mm smooth rod (8.3 mm slip-fit bore) locked by an M3 set screw, so it works as an anti-backdrive for a hand-crank winch, gate or lift. 24 mm tall, prints as two captured pieces with 0.4–0.9 mm clearances, no supports.