Use this simple Mathematical Formula! TPF"
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x 12” In
the United
States spindle
nose tapers are commonly expressed as Taper Per Foot (TPF). Asian
and European machine tool builders often express the same spindle tapers
in terms of degrees or ratios. Regardless
of the expression the calculation is still based on the above formula. Refer to your copy of the Machinery’s Handbook for conversions. Here
are a few of the more common tapers you’ll encounter.
