CC-GT2-DS-40t-8 revA Size datasheet - 40t-8
'?) CommunityCAD
GT2 timing pulley, 40 teeth, 8 mm bore
Size datasheet: this size's values with their levels, conventions and sources.
For GT2 6 mm belts ona 8 mm shaft Part key gt2-pulleys-40t-8 Files 1 STEP AP214 (simplified) 40t-8, hub end, 0.5:1 AOt-8, side, 1:1 (hidden lines dashed)
Sym. Dimension Value Level dp Pitch diameter (the belt's pitch line) 25.46 L1-2 da Outside diameter (the band) 24.96 L1-3 df Flange diameter 30.734 L1- 3 b Face width between the flanges 7.366 L1-2 bf Width over the flanges 10.3% lo -1 L Overall length 18.2626 l1 + 2 dh Hub diameter 19.1516 l1 + 2 M Set screw thread 4 L1- 2 th Gates' hub length (recorded) 7.9756* lo: 1 de Misumi's face diameter (recorded) 21% lo: 1
Modeled value: nominal, else the midpoint of min-max. s / =: only that limit is given. * amber: one source (LO). c: a source value was corrected. Level - independent sources.
Gates' design manual, Misumi GPA 2GT and SDP/SI tables Page 1/2 GT2 timing pulley - 40t-8 - Dimensions in mm - CC-BY 4.0, lronPixel Labs LLC spec 7c5f93bb2a1674fad1ed142d21f252056a66a74e
Modeled from cited sources; not certified. Found an error? Use the feedback section on the part page.
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. CC-GT2-DS-40t-8 revA '?) CommunityCAD Size datasheet - 40t-8
Conventions
+ Makers’ tables: No published standard: Gates' design manual, Misumi's GPA 2GT tables and SDP/SI's catalog page, each its own lineage. Pitch and outside diameters agree at every size.
« Where makers differ: The largest stated flange, face width, overall length and hub, so the model covers every maker's pulley; each maker's value is on the page. 16t-5 and 20t-5 stand on one lineage, labelled single source.
¢ Band, flanges and hub: The toothed band is a plain cylinder at the outside diameter: Gates' groove profile is proprietary. Each flange (bf - b) / 2 thick, the hub L - bf long, computed. The flange rims, hub end and bore chamfered. Illustrative, checked for fit only.
« Set screws: Radial plain bores at the thread's nominal diameter, through the hub's wall at mid-hub: two at 90 degrees, one on 16 teeth (Gates' note). Their place along the hub is house.
Sources
Source Publisher Retrieved sha256
gates-light-power-precision Gates (distributor copy, Maxiparts) 2026-11-05 ef9F602173db
misumi-gpa-2gt MISUMI 2026-11-07 16a48c814d68 (kept outside the repo) sdpsi-gt2-molded-6mm SDP/SI (Stock Drive Products / Sterling 2026-11-07 cbed25edf8d7 (kept outside the repo)
Instrument; copy hosted by LulzBot)
The whole series (verification map, corrections, drawings): CC-GT2-DS.
Gates' design manual, Misumi GPA 2GT and SDP/SI tables Page 2/2 GT2 timing pulley - 40t-8 - Dimensions in mm - CC-BY 4.0, lronPixel Labs LLC spec 7c5f93bb2a1674fad1ed142d21f252056a66a74e
Modeled from cited sources; not certified. Found an error? Use the feedback section on the part page.