Fanuc G86 Boring Cycle – Precision Hole Drilling with Repeatable Depth Control
G86 boring cycle is used to bore a hole.
Syntax
G86 X... Y... Z... R... F... K...
| Parameter | Description |
|---|---|
| X | Hole position in x-axis. |
| Y | Hole position in y-axis. |
| Z | Depth, tapping from R-plane to Z-depth. |
| R | Position of the R plane. |
| K | Number of cycle repetitions (if required) . |
| F | Feedrate. |
Once given in program G86 boring cycle is repeated at every axis movement until G80 is given in program to end this cycle.
Usage
N150 M6 T2 N160 G90 G00 X60 Y28 Z12 S100 M03 N170 G99 G86 X60 Y28 Z-15 R2 F120 N180 G98 Y12 N190 G91 G80 G28 X0 Y0 Z0 M05 N200 M30
Working
Brief description of how G86 boring cycle works,
G86 boring cycle working
1- Rapid traverse to X, Y position.
2- Rapid traverse to R-plane.
3- Boring with feed from R-plane to Z-depth.
4- Spindle stop at bottom of the hole.
5-1- Rapid traverse to R-plane (G99) or Initial-level (G98)
5-2- Spindle start CW
G98 G99 Modes
How G86 boring cycle behaves upon G98 or G99 mode,
G98 Boring tool will return to the Initial level
G99 Boring tool will return to R-plane.
For a working example see G81 drilling cycle.
Repeat Drilling
If K parameter value is given with G86 boring cycle, then boring will repeat the number of times given with K. See G81 drilling cycle example.
CNC Machine
- Fanuc G85 Boring Cycle – CNC Mill Programming Guide
- Fanuc G76 Fine Boring Cycle: Video Demo & CNC Mill Tutorial
- Master Fanuc G76 Fine Boring Cycle for Precision CNC Milling
- Mastering the G86 Boring Cycle for Fanuc CNC Milling
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- Optimizing Fanuc G81 Drilling Cycle for Efficient Spot Drilling
- Mastering the Fanuc G82 Drilling Cycle: Precision Counterboring for Accurate Depths
- Fanuc G84 Tapping Cycle: Complete Guide & Syntax
- Mastering the Fanuc G85 Boring Cycle: Precision Hole Drilling Explained
- ECS G86 Boring Cycle with Spindle Stop Feature