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Materials Factor (Cs)

Materials Factor

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)

Ration Correction Factor

3< m G <=20
20< m G <=76
m G > 76

Velocity Factor (Cv)

Velocity Factor

Vs < 700 ft/min
700<=Vs <3000 ft/min
Vs > 3000 ft/min

Coefficient of Friction (f)

Coefficient of Friction

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)

Mechanical Engineering Data

Contributed by:

Falak Ahluwalia
Indian Institute of Engineering Science and Technology