Mechanical Belt Tools
GT2 belt tools
Size goBILDA 2 mm GT2 timing belts without guesswork. Tell it what you already know: the ratio, the pulleys and spacing, or the belt in your hand. It solves the rest, with a live diagram and links to the exact part.
Design it
Every pulley pair near your ratio, matched to real goBILDA belts, ranked by how close they land to your spacing.
Tolerances & pulley range
Find a belt
The ideal belt length for your layout, the nearest stock belts, and how far to nudge a shaft to fit each one.
Place the shafts
A belt of fixed length around two known pulleys fits at exactly one spacing. This finds it.
New to timing belts?
A timing belt is a toothed loop that links two toothed pulleys so they turn together without slipping. The ratio of their teeth sets the trade between speed and torque: a 24T pulley driving a 48T pulley is a 2:1 reduction, half the speed and twice the torque.
For the parts themselves, see Robot Hardware.
The catch
Belts only come in certain lengths, so the center-to-center distance between the shafts has to match a belt that exists. That's the problem these tools solve. If you're between two sizes, round up to the slightly looser belt and take up the slack with a tensioner. Never round down.
All belts here are goBILDA 2 mm GT2 continuous loops, 6 mm wide. Check stock and price on goBILDA before you order.
goBILDA GT2 belt catalog · 22 sizes
| Teeth | Pitch length | SKU |
|---|
Need a length that isn't stocked? goBILDA also sells a 5 m cut-to-length roll (3426-0006-0005) for runs that don't loop back on themselves.