Description
A plain square block measuring 5 mm by 5 mm by 1 mm, flat on the bed and ready to print.
Images
A flat 28.5 × 40 × 3 mm plate with an 11 × 11 mm raised square pad, 0.5 mm thick, centered in X and set 2 mm from the Y- edge. Remix hooks Pad thickness (0.5 mm): a multiple of your layer height keeps the pad clean. 0.5 mm is about 2 or 3 layers. Pad offset (2 mm from the Y- edge): move it along Y to centre it or push it to the other edge. Plate length (40 mm): the pad is 11 mm, so any length above roughly 15 mm still holds it. Pairs with: a label, a sticker, or a second pad in a different colour for a multi-colour swap.
A bracelet repair print that turns out too tight or too loose wastes hours. This fit gauge block is a 15-minute test piece that checks the fork slot and pin bores before the real part gets printed. Key numbers Block: 14 x 32 x 6 mm, origin at center, 1.2 mm edge fillets Fork slot: 5.2 mm wide, 12 mm deep, open at the -Y end, flat end wall at Y = -4 Prongs: 4.4 mm wide each Bores: Ø1.6 along X at Y = -10 (through both prongs) and Y = +10 (solid section) Tongue sample: 4.4 x 4.6 mm, 8 mm long on the +Y end, 0.9 mm end fillets, Ø1.6 bore at Y = +19 (40 mm overall) Printing Flat on the bed, PLA or PETG, 0.4 mm nozzle, 0.2 mm layers 4+ walls, 100% infill, 3 mm brim, no supports, 40 mm/s or slower Ream both bores once by hand with a 1.5 mm drill bit Checks A bracelet tongue link should enter the slot with slight friction. An original pin should slide through the -Y bore.
Sleeve is a plain, precise hollow cylinder sized in inches: a straight-through bore and a clean outer wall, ready to use as a spacer, bushing or standoff. Dimensions Outer diameter: 0.385" (9.78 mm) Inner diameter: 0.26" (6.60 mm) Length: 0.75" (19.05 mm) Wall thickness: about 0.0625" (1.59 mm) Print notes Print standing on end, no supports needed. Bore may print slightly tight; ream or scale up a touch if fit matters.

A hex tube, 4 cm tall, for when a round spacer or standoff spins or rolls where a flat-sided one would hold still. The 2.5 mm bore runs the full length so a rod, wire or screw passes straight through. Key dimensions Height: 40 mm Width: 5.15 mm point to point Center bore: 2.5 mm diameter, through the full length Printing Print standing upright, no supports needed. Walls are thin at the hex flats, so use at least 2 perimeters and a small nozzle if possible.
A round spacer 69 mm in diameter and 10 mm tall with a 40 mm center bore and five 5.5 mm through-holes on a 54 mm bolt circle. Outer diameter: 69 mm Height: 10 mm Center hole: 40 mm Bolt holes: 5 × 5.5 mm on a 54 mm circle Hole spacing: 68°, 72°, 72°, 68°, 80° (the 80° gap is between the last and first hole) Prints flat with no supports

Rectangular block, 100 mm long, 24 mm wide and 15 mm tall, with a 16 mm wide by 11 mm deep groove running the full length along the top centre. The groove size is engraved into the groove floor as "16 x 11 mm". Overall size: 100 x 24 x 15 mm Groove: 16 mm wide x 11 mm deep, open at both ends Side walls: 4 mm; floor: 4 mm Engraving: 0.6 mm deep, readable from above Prints flat with no supports