Metal gears from Argos motors

[webby]

im sorry if i sound rude but there only 10pounds!

[harry hills]

the drills themselves are £10, but have quite bad plastic gears, adding metal ones will make it stronger

[ewan]

Drill gearboxes have two stages, both planetary. First stage is often plastic and second is metal, in heavy abuse applications like robot drives the plastic stage sometimes strips though