Calculate the numbers of circles on the outside of an inner circle - like the geometry of rollers on a shaft.
The calculator below can be used to calculate the maximum numbers of rollers on a shaft - or - the maximum number of circles on the outside of an inner circle.
The calculator is generic and any kind of units can be used - as long as the same units are used for all values.
Shaft or Inner Circle Diameter (in, mm, m)
Rollers or Outside Circles Diameters (in, mm, m)