G85 - reaming cycle: G85 X1. Y1. Z1. R.1 F5 G99
This cycle is used for reaming and it feeds in and out of the hole at the set feed rate.
G85 X1. Y1. Z1. R.1 F5 G99
Many programmers will use G81 or G86 to ream and not waste time feeding back out of the hole. However rapid extraction of a reamer from a hole can produce unwanted scoring or galling.