Specifications:
Material: Hardened Steel
MOD: 1mm
Teeth: 19T 20T 21T 22T 23T
Height: 14mm
Suitable shaft diameter: 5mm
Package List:
1 × 19T Gear
1 × 20T Gear
1 × 21T Gear
1 × 22T Gear
4 × Grub Screws
2 × Hex Key
How to install the pinion gear:
You will probably need to loosen the motor a bit, in order to fit the pinion gear on.
Make sure you lock it in place on the flat portion of the motor shaft.
When you are tightening it back up, make sure you leave about a gap between the pinion gear and the spur gear.
That gap will be very small. It should be about the width of a piece of paper.