I'm building an automatic litter box for my kitty and I tried building two versions using a GT2 timing belt + pulley but the belt seems to slip from the pulley often (since it requires high torque) and once the belt snapped.

Do you have any recommendations for a higher torque timing belt and a corresponding pulley + tensioner I could buy? I am currently looking into a timing belt for a car + a tensioner + pulley, but perhaps that's overkill. It is pretty cheap though.

More generally, I am also open to suggestions to linear movement without a timing belt, but I'd like the solution to be relatively cheap (under $100 for 2ft of movement)


  • $\begingroup$ Maybe what you're doing is over designed. A litter tray + litter + cat mess shouldn't weigh that much. $\endgroup$
    – Fred
    Jun 7, 2023 at 2:01
  • 1
    $\begingroup$ why not a chain instead of a belt? Timing belts are relatively high speed low power. Chains are great for low speed - this sounds more like a conveyor than a cam drive. $\endgroup$
    – Tiger Guy
    Jun 7, 2023 at 3:38
  • $\begingroup$ maybe you are buying low quality belts $\endgroup$
    – jsotola
    Jun 7, 2023 at 4:44
  • $\begingroup$ Maybe you don't have sufficient tension on the belt. $\endgroup$
    – Solar Mike
    Jun 7, 2023 at 4:46


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