Rollers on a Shaft Calculator
If C = 0:
Ds:
d:
N:
(Fill any two fields above)
If C = 0, D = d / sin(180 / N)
If C > 0:
Ds:
d:
N:
C:
(Fill Ds, d and N fields)
If C > 0, C = D sin(180 - (N - 1) asin(d / D)) - d
D = Ds + d
Example: 38 bearings are to be placed around a 7.57 cm diameter shaft with no clearance (C=0). What diameter bearings are needed?
Answer: d = Dsin(180/N) = Dsin(180/38) = 0.082579D D = Ds + d = 7.57 + 0.082579D
D = 7.57/.917421 = 8.25139 d = D - Ds = 0.68139