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Attainable speeds for typical spindle bearing arrangements

A typical spindle bearing arrangements, which can contain various bearing types, comprises a bearing support on the tool end and another support on the non-tool end. The support on the tool end is usually the critical one. It typically uses larger bearings, forcing a higher speed factor A. Diagram 1 provides a comparison of possible bearing arrangements and their relative speed capability. The comparison is based on bearings with an 80 mm bore on the tool end and 70 mm bore on the non-tool end. For details about the bearing series, refer to the designation system of:
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