Selecting a Tap Drill

Are you trying to determine what size of hole to drill before cutting threads with a tap?

Rather than digging out your copy of Machinery’s Handbook, check your drill index. Many of the better indexes have a tap drill chart built right in.

| July 26th, 2010 | Posted in Tools |

One Response to “Selecting a Tap Drill”

  1. Uncle Buck Says:

    I have always liked those big three in one sets of letter, number, and fractional bits all rolled into one. That is a good tip on the drill index thing there Steve.

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