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.*
Five-Mandrel Coil Spring Winding Block
A hand-held block for winding your own coil springs on 3, 4, 5, 6 or 8 mm steel rod mandrels. Each 22 mm deep slip-fit bore (rod + 0.3 mm) has a flared 1.8 mm wire-feed channel tangent to it, sized for 0.5–1.2 mm music wire. Chuck the rod in a drill, hold the 84 x 28 x 22 mm block and walk it down the rod, and you get a custom spring for a latch, a detent or a robot joint without buying a whole assortment kit.
PVC And EMT Pipe Size Slot Gauge
A 110 x 100 x 5 mm gauge plate for sorting offcuts in the bin or checking a fitting in the aisle. It has U-slots for Schedule 40 PVC in 1/2", 3/4" and 1" (21.3, 26.7 and 33.4 mm OD) and EMT conduit in 1/2" and 3/4" (17.9 and 23.4 mm OD), each 0.5 mm over nominal. A row of 3, 4, 5, 6 and 8 mm round-stock and hinge-pin holes runs across the middle. The pipe drops into the smallest slot it fits, and raised-free dimples mark sizes with no text: round dots for PVC, square dots for EMT.