Also higher ratio 100:1 to 4900:1 can be given on Double Reduction.
MATERIAL&CONSTRUCTION:I.S.S. 3734 1966 for worm gearing or DIN or latest ISI standard.
WORM : The worm is Solid with shaft made of high grade alloy steel so as to give hard wear resisting surface duty case hardened & super finished. The bearing & Oil seal generals are accurately, cylindrically ground to give smooth runring.
WORM WHEEL:made of centrifugally cast Phosphor Bronze rim shrunk.
GEAR HOUSING: made of close graded cast iron. Large cooling fins on both sides a adequate cooling area improve efficiency.
BEARINGS : The ball or roller bearings are used in worm wheel with ample capacity that is can take journal and thrust loads.
OIL SEAL : Best quality of oil seal are used (fenner).