Related Resources: gears
Worm Gear Sizing Calculator
Worm Gear Sizing Calculations and WormGear Nomenclature
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Materials Factor (Cs)
C <= 3 in |
sand-cast |
d G <= 2.5 in |
d G > 2.5 in |
chilled-cast |
d G <= 2.5 in |
d G > 2.5 in |
centrifugally cast |
d G <= 2.5 in |
d G > 2.5 in |
Ratio Correction Factor (Cm)
3< m G <=20 |
20< m G <=76 |
m G > 76 |
Velocity Factor (Cv)
Vs < 700 ft/min |
700<=Vs <3000 ft/min |
Vs > 3000 ft/min |
Coefficient of Friction (f)
Vs = 0 |
---|
0 < Vs <= 10 ft/min |
Vs > 10 ft/min |
References
(Equations above from Shigley and Mischke )
Norton, Robert. Machine Design an Integrated Approach . 2nd Ed.
(pp. 778-787)
Shigley and Mischke. Mechanical Engineering Design . 6th Ed.
(pp. 836, 855-56, 869-74, 974-86, 988-90)
Contributed by:
Falak Ahluwalia
Indian Institute of Engineering Science and Technology