Fixed Cycles on the Mill - 8: G82
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.

G82 - counter boring cycle: G82 X1. Y1. Z-1. R.1 P500 F7 G98

This cycle causes the tool to feed to the bottom, pause if desired, and then rapid out of the hole.

Note the new word. P=Pause (or dwell) and is programmed in milliseconds. A millisecond is 1/1000 of a second so 500/1000 is 1/2 second of pause. It is important to allow the tool time to cut the bottom of the hole.

A pause relieves tool pressure. For counter bore depths that have tight tolerance, this time is necessary.

If you don't want to pause just use a G81

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label: fixed cycles, G codes, words, canned cycles G73, G74, G76, G81, G82, G83, G84, G85, G86, G89