Messages Archive

Subject:
transfer punches

John K Jordan
For those unfamiliar with transfer punches the important thing to remember is they are not intended to put divots in metals such as you would do with a center punch.

Many sold do are not harndened punches. There are poor reviews on Amazon lamenting how their punches were ruined with the first hammer blow.

These are used for transferring the the centers of of a hole to another part. Marking wood with a soft tap is fine on unhardened transfer punches. If marking steel or even aluminum, you can first coat the metal with Dykem Blue or some other layout fluid. Mark the dye without impact force, not the metal. Then if needed use the center punch, laser, or other means to align the drill or end mill with mark.

JKJ

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