Chassis punches are as marked. The knockout ones are for conduit pipe and
are the inside as to the tubing spec.

Martin


Martin H. Eastburn
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On 5/26/2010 12:50 PM, danmitch wrote:
Lewis Hartswick wrote:
DoN. Nichols wrote:

Be careful not to use a Greenlee knockout punch, because the
diameters don't match the names there -- they match the conduits for
which the knockouts are used.

Good Luck,
DoN.

Use a " Chassis " punch they are as marked.
...lew...
Undeed, and Greenlee and others make BOTH types.

Electrical "Knockout" punches are like Helicoil taps ... NOT the size
they are marked and you may be expecting. All are very handy, but use
with caution!

Dan Mitchell
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