WTI Fasteners Databooks
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Roughing Hand Tap
Roughing taps are known as taper taps or 1st lead taps.
Roughing taps are used in conjunction with either the finishing or bottoming tap
It has up to 8 tapered threads that give a gradual cutting action, preparing a tapped hole that is marginally undersize in diameter prior to the use of the Finishing or Bottoming tap.
This provides a longer cutting life of the Finishing and Bottoming tap.
Recommended for use with large diameter sizes, coarse pitch threads or tough materials.
