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Insert Design Guidelines

Designing with Yardley Inserts

Cored or machined holes should be the correct size for the insert used. If the hole is too large, there is a reduction in stripping torque and pull-out force. For optimum performance, the boss diameter should be twice that of the insert diameter. A larger boss diameter increases the stripping torque. Please consult our engineering department for specific recommendations on your applications.

Hole Preparation Guidelines

A - Boss Diameter = 2 x insert diameter
B - Insert Diameter
C - Hole Depth = 1.25 x insert length
D - Starting Hole Size - see recommendations for each individual insert type and size

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Design Guidelines