Cheap worm gear assemblies

[mklotz]

Model builders often have need of miniature worm drives. Making one's own can be labor intensive. One alternative is to use the tuning machines for stringed instruments. I paid $6 for six of them...

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Disassembling them is easy. Simply unscrew the screw that secures the gear to the shaft and they can be broken down into component parts.



On the ones I bought, the gear has fourteen teeth so the gear ratio is 14:1. Other tuning machines may have different ratios.