Plastic Worm Gear M: 0.3 or 0.4
A worm gear is usually meshed with a spur gear or a helical gear, which is called the gear, wheel, or worm wheel.
Module: 0.3 / 0.4
OD: 3.5 / 5.0mm
Length: 4.5 / 5.0mm
M3 gear Bore Diameter: 0.65mm ( fitting shaft 0.7~0.9mm in diameter)
M4 gear Bore Diameter: 1.0mm ( fitting shaft 1~1.05mm in diameter)