Sproket 9 Teeth 1/8 Bore

Finally got around to replacing a worn sprocket on my model train and this acetal resin one slid right onto the 1/8 bore shaft with no fuss. The self-lubricating material is a nice bonus for something that runs continuously in a display.

This little 9-tooth sprocket is a perfect fit for my model train gearbox, and the self-lubricating acetal resin runs much smoother than the metal ones I've tried.

Swapping out the stock plastic sprocket on my robot arm for this acetal resin one was a noticeable upgrade—the self-lubricating property keeps everything running smoothly without extra grease. It's tiny but tough, and the 1/8 bore fit my motor shaft perfectly on the first try.