Timing Pulley (L, 18 teeth)

A flanged timing-belt pulley for L belt — 9.53mm pitch, 18 teeth, 54.6mm pitch diameter, 53.8mm outside diameter, 12mm belt width, 8mm bore. Cut to ISO 5294 table 2: 3.05mm groove width on the pitch line, 2.67mm deep, 20° flanks, 0.38mm pitch line differential. Checked against the standard's own diameter tables. Not GT2, and deliberately so: the Gates GT2 curvilinear tooth is proprietary — there is no ISO or DIN standard for it and Gates publishes no profile — and the coordinate lists circulating in open-source pulley generators are community reverse-engineering with no traceable source, so nothing here is called GT2 or copied from them. ISO 5294 is a real, public, checkable standard. It is also the more honest choice for FDM: a 2mm-pitch groove is 0.65mm across and 0.69mm deep, which a 0.4mm nozzle renders as ripple rather than teeth, whereas L at 9.53mm has a groove 2.77mm wide that actually comes out. The only overhang is the top flange's underside — a 1.5mm annular ledge, a short bridge rather than a support problem. PETG.

from £10.57example, in PLA