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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.
A cradle chassis for building a 3S (or 3P) 18650 pack: three 18.9 mm teardrop bores on 21.5 mm centres hold the cells in two 8 mm end collars plus a mid saddle, leaving both terminals flush with the outer faces at exactly 65 mm so nickel strip can be welded straight across. 82 x 68 x 34 mm, with raised + / − polarity ribs above each bore alternating for series wiring, four 3.4 mm M3 clearance holes to bolt the pack into a project, and four 12 x 5 mm zip-tie slots through the 3.5 mm base.
A 44 mm square block with four through-bores (18.7 mm, on 20.6 mm centres) that holds four 18650 cells upright, parallel and bottom-flush against the bench so nickel strip lands square during spot-welding or pack glue-up. Open-topped grab notches — one per cell, in 4-fold symmetry — let you spin a cell to set polarity, and two 5 mm ears with M3 clearance holes bolt the jig to the bench; overall 68 x 44 x 26 mm.
A 60 mm one-piece carabiner whose gate is a built-in flexing spring arm — press it inward to hook on, and a capture nose stops it opening under load. Prints flat with no supports, no assembly, and no metal spring; sized for keys, water bottles, and bag straps.