Helical worm gearboxes CR

When designing this range of gearbox, S.T.M. technicians decided to project one single body to include all gears.
This solution allows an efficient heat dissipation as well as a high housing rigidity and application easiness.
Efficiency will then be positively improved but also longevity and highest transmittable torque.
The compromise cost/performances is particularly centered in the middle range reduction ratios.