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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
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