working out your gear ratio

[alex90]

hi there I just bought a second hand g36 gearbox as part of a job lot of parts and the guy told me it been modified but he didn't know what was inside (brilliant)

iv opened it up and ist been built buy an ape or a pack of monkeys

but is there an easy way to work out the gear ratio of whats inside

thanks alex

[Ian_Gere]

Taking 18:1 as a standard ratio, count the teeth. High speed gears will have less, high torque more. I don't know which gears are altered or whether it is all of them, but less/more teeth is how it's done, the same as gears on a bike.

[alex90]

So not the case of spinning the secter gear once and seeing how many time beavel gear turns

[jcheeseright]

that works too. one turn of your sector gear will equate to 18 turns of the motor on an 18:1 set.

[alex90]

Cool

[Ian_Gere]

Damn difficult to see how many times the motor gear spins though, eh?

[jcheeseright]

easy, bit of pen on one of the teeth, count how many times it goes round!

[Ian_Gere]

How tf are you going to have the motor gear in contact with the bevel gear and see it spinning?