Worm Gear

Worm Gear Sets A63

Legende
i = gear ratio da1 = tip diameter (worm) T2 = output torque
γm = Lead angle z2 = No. of teeth MF = mineral grease
mn = module dm2 = pitch diameter (worm gear) MÖ = mineral oil / synthetic grease
z1 = number of threads dA = max. diameter (worm gear) SÖ = synthetic oil
dm1 = pitch diameter (worm)

All worms and worm gear are stocked right-hand only.
Worm made of case-hardened and ground steel (HV 620 – 700).
Worm gear made of CuZn37Mn3Al2PbSi-S40 or CuZn37Mn3Al2Si°. On request made of plastic or HGW 2083.

What are worm gears and where are they used?

A worm gear consists of a worm and also a gear (in some cases called a worm gear) with non-parallel, non-intersecting shafts at 90-degree angles to each other. The worm is similar to a screw having a V-thread, and the gear is similar to a spur gear. The worm is usually the drive part; the threads with the worm propel the teeth with the gear.Like a ball screw, the worm in a worm gear may have a single or multiple ends – which means there are multiple threads or helixes on the worm. With a single-ended worm, the gear advances one tooth for every full revolution (360 degrees) of the worm. Therefore, a gear with 24 teeth will provide a gear reduction ratio of 24:1. For multi-start worms, gear reduction is equal to the number of teeth on the gear divided by the number of starts on the worm. (This is unlike most other types of gears, where gear reduction is a function of the diameter of the two components.)