[18660] Helical gear set

h_gears Helical gear set of 4 gearwheels.
The gears have a helical teeth profile for a smoother and more dureable transmission. The gears are all made from steel and are hardened.
The small gears (pinions) are secured with 4 grub screws.

The gear set has a ratio 7,11 with following gears:

Z1 - 19T
Z2 - 45T
Z3 - 16T
Z4 - 48T

Different ratios are possible with the upgrade set 18670.
For mounting the Z2 gear partnumber 18606 is needed (gear carrier layshaft).