Thread: Presses and techniques for 1/2" HEX broaches
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Unread 04-01-2016, 01:16
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Re: Presses and techniques for 1/2" HEX broaches
Also,

Make sure you hole is true; I prefer a drill and ream to size. You must also lubricate the broach for best results. In my home shop (where the press is) I have used diesel fuel, Kerosene, WD-40, or fine spindle oil. If you slightly back off the ram before each stroke, the broach can recenter itself and stay true to the hole. If you are broaching items thinner than the distance between the teeth on the broach, use a scrap piece with the same hole size to make up the distance and keep the broach running true.

DO NOT WIRE BRUSH A BROACH AS YOU WILL DULL IT. DO NOT RUN IT IN BACKWARDS EITHER!