by EWBrown » Sat May 16, 2009 10:19 am
A half-inch conduit punch is really 7/8 inches, and a 3/4 inch conduit punch is actually 1 1/8 inches. The size referred to with conduit, is the internal diameter of the conduit "pipe".
One nice feature of the conduit punch sets is that the drive bolts (3/8 inch and 3/4 inch) have ball-bearings, so that the rotational friction is significantly reduced.
I bought a lightly-used 4 piece conduit punch set last year, and the largest punch is just the right diameter for the James 6113 and 6115 OPTs' terminals.
/ed B
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