Spindle Sizing Instructions

Sizing Your Spindle for Your Application

In order to ensure a long and dependable spindle life, consider the following when determining your spindle sizing requirements:

1. Select the largest spindle that will fit your particular space and speed requirements. This ensures maximum spindle stiffness and longest life.
2. Keep tool overhang to a minimum. Bearing loads increase and spindle stiffness decreases as you move further from the spindle bearings
3. Verify the spindle front bearing bore is approximately as large as or larger than the diameter of the hole being machined.
4. Keep within the maximum torque rating. This will minimize any shaft or bearing loading and premature spindle failure.
5. Consider the spindle environment; conditions play a role in design. For example, deflector covers are recommended when heavy coolant is used.
6. Specify the correct bearing arrangement. Most radial loaded applications use a bearing pair at the nose end. High axial loads, combination axial and radial loading, and heavy or interrupted cuts use a triplex bearing set at the nose end.
7. If you are unsure of exactly what you need, please call 847.680.8833 and we will assist you in selecting a spindle.

For detailed sizing information, refer to our Documentation Section to determine your spindle requirements based on your operations.