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G83

Machining center, LatheModal, group 09

Deep hole drilling cycle (peck drilling, full retract to the R point each time)

⌨On machining centers

G83 X_ Y_ Z_ R_ Q_ (depth of cut per pass) F_ K_

After each Q of cut, retracts at rapid to the R point to clear chips, then rapids back to just short of the previous depth and cuts again
Q is an unsigned incremental value. 0 or negative values are not allowed (NIST)
The clearance d for the retract and re-approach is set by a parameter (GUD on Siemens ISO, Setting 22/52 on Haas)
Cutter compensation cannot be used during a canned cycle (NIST)

Diagram: G83 motion (side view)

After each cut of Q, it retracts to the R point to clear chips, then rapids back to d (a machine setting) short of the previous depth and cuts again. Figure shows G98.

◎On lathes: End face deep hole drilling cycle (live tooling, lathe with C axis)

The same number means something different on lathes (FANUC-type G-code system A). Group 10.

On ordinary lathes, deep center holes are usually drilled with G74

≠Differences between controls and machines

The same code can be written or assigned differently depending on the CNC control and the machine builder. Always check your machine’s manual.

Source	Machine	Item	Detail
Haas	Machining center	Format	G83 X_ Y_ Z_ R_ Q_ F_ or I_ J_ K_ (depth of cut decreasing in steps)On Haas, do not write Q when using I/J/K. Setting 52 lowers the R point to reduce air cutting
Haas	Lathe	Group	09

📚Sources

The meaning shown agrees in at least two sources (agreement confirmed). Explanations are written in our own words.

Siemens AG — SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D Programming Manual ISO Milling, 04.2007 Edition (6FC5398-7BP10-0BA0) cache.industry.siemens.com
Haas Automation, Inc. — G-code, M-code, and Setting (per-code explanation pages) haascnc.com
Haas Automation, Inc. — Mill Operator's Manual – 17 Mill G-Codes (online version) haascnc.com
National Institute of Standards and Technology (NIST), USA — The NIST RS274NGC Interpreter – Version 3 (NISTIR 6556, 2000) nvlpubs.nist.gov
Siemens AG — SINUMERIK 802D sl/840D/840D sl/840Di/840Di sl/810D Programming Manual ISO Turning, 04.2007 Edition cache.industry.siemens.com
Haas Automation, Inc. — Lathe Operator's Manual – 16 Lathe G-Codes (online version) haascnc.com