Drill Cycles G81

G81 X __ Y__ Z__ R__ F__ K__

X__ Y__ = Hole Position

Z__ = Distance from Z=0 plane to bottom of hole (negative)

R__ = Distance from Z = 0 to clearance plane

F__ = Cutting feed rate

K__ = Number of repeats

Related Codes

G98 = Return to initial point in canned cycle

G99 = Return to R point in canned cycle

Note: G98 or G99 must be called out before G81

jpf 1.4.1 Example 1

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N120 G00 G90 G94 G40 G20 M06 T1 (set up codes and tool change)

N130 G55 X1. Y1. M03 S2500 (work coorids, rapid move, spindle on)

N140 G43 Z1. H01 M08 (Tool Height Offset, Coolant)

N150 G98 G81 X2.0 Y3.0 Z-1.1 R.1 F20 K1 (Drill Cycle)

N155 ..........

Figure 1. Illustration of part program shown in example 1.

jpf 1.4.2 Example 2

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N120 G00 G90 G94 G40 G20 M06 T1 (set up codes and tool change)

N130 G55 X1. Y1. M03 S2500 (work coorids, rapid move, spindle on)

N140 G43 Z1. H01 M08 (Tool Height Offset, Coolant)

N150 G99 G81 X2.0 Y3.0 Z-1.1 R.1 F20 K1 (Drill Cycle)

N155 ..........

Figure 2. Illustration of part program shown in example 2.

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