A New Design of the Universal Test Rig to Measure the Wear Characterizations of Polymer Acetal Gears (Spur, Helical, Bevel, and Worm)

Table 4

Worm and wheel gear specifications.

Parameters	Value
Module	3.15 mm
Number of teeth (worm/wheel)	2/28
Normal pressure angle	20°
Pitch diameter (worm/wheel)	32/90 mm
Face width (worm/wheel)	40/29 mm
Axial pitch	10 mm
Centre distance	61 mm