Worm gear units

Product concept

Worm gear units are favoured in general machinery and plant engineering. ZAE places particular importance on the quality of materials used and this ensures a:

Long service life
Above average loadability
High performance potential
Excellent smooth and emergency running characteristics
Minimal maintenance

All housing parts are made from high quality grey cast iron (GG20). The hollow bosses for gear unit sizes greater than 100 are made from ductile (spheroidal) graphite iron (GGG42), the worm shafts are made from 16MnCrS5BG, which is hardened and ground. Worm gear unit rims are made from centrifugally cast solid bronze with nickel additives GzCuSn12Ni. This special bronze is responsible for the outstanding smooth and emergency running properties.

Advantages and features

10 sizes with axle separations of 40 to 315 mm
12 standard transmission ratios from 5:1 to 83:1
(as a double worm gear unit, up to 6890:1)
Drive torques up to 27,700 Nm

Model range

Gear unit models include foot, flange and hollow shaft versions with and without torque converters. The hollow shaft version is available both with feather key and also shrink-on disk connections.

Type E: Gear unit with free input shaft
Type M: Optionally available with motor flange and motor coupling for IEC motors or square flange as well as a motor coupling with a clamping set for servomotors.

Up to gear unit sizes of 125, ZAE worm gear units can be equipped with an integral, externally adjustable safety friction clutch.

Customer specific adjustments

More than 50 % of our worm gear units are individually customized to meet the specific requirements of our customers.