Helicoil Drill Chart Inch

Helicoil Drill Chart helicoil heli-coil
The minimum drilling depths shown below allow for the following recommended practices:
  1. Countersinking the drilled hole to prevent a feather edge at the start of the tapped hole.

3/4 - 1-1/2 pitch of insert "set down" to allow for maximum production tolerance. Dimensions are shown for both plug and bottoming taps.





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