G83 drills deep holes in steps (pecks), fully retracting between pecks to clear chips. Use it whenever a hole is deeper than about three diameters, where a straight G81 would pack chips and bind the drill.
Format
How it works
- Q is the depth of each peck; the drill retracts to clear chips after each one.
- Z is the final depth, R the retract plane.
- G80 cancels the cycle.
Example
FAQ
What peck depth should I program with G83? A common starting point is 1 to 3 times the drill diameter per peck, decreasing the peck depth as the hole gets deeper and depth-to-diameter ratio increases, to keep chips clearing reliably.
What’s the difference between G83 and G73? G83 (full peck drilling) fully retracts the drill out of the hole on every peck for maximum chip clearance, while G73 (chip-break drilling) only backs off slightly, which is faster but provides less complete chip evacuation.
Related: G81 drilling and the Number Drill Chart.