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.
3-8 mm Pin And Round Stock Rack
A 132 x 56 x 28 mm bench rack that keeps short lengths of 3, 4, 5, 6 and 8 mm steel pin, drill rod and dowel standing upright. Each size gets its own lane of eight slip-fit holes (nominal + 0.3 mm, so 8.3 mm for 8 mm rod), and raised dots on the front edge count 1 to 5 so you can tell the lanes apart. Rods pass through a 4 mm top deck and sit in 1 mm locating dimples in the floor. Inside, the body is hollow and split into cells by ribs, which keeps it at roughly 60 cm³ instead of a solid brick.
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.