As illustrated in the figure, it is possible to execute a keyway inside a workpiece, even without a relief groove, using the REV BROACHING TOOL. Broaching without relief grooves considerably reduces the amount of time required per workpiece, however, it requires special inserts, with a cutting angle that is more inclined than the standard configuration, as the tool must perform a radius to lift off of the wall of the workpiece. This type of processing is used when there are difficulties in executing relief grooves inside the piece or when executing relief grooves risks weakening the structure.
To broach keyways without relief grooves, our company offers a specific programme for cnc.

PROGRAMMING EXAMPLES:

Highlighted in red only the values that require editing

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O1000 (RECALL MACRO G68 INT-EXT)

#1=0 (INTERNAL =0 /EXTERNAL =1 PROCESSING)
#2=180 (ANGULAR DIRECTION=180 )
#3=1 (TOOL NUMBER)
#4=11 (TOOL RADIUS)
#5=25.0 (HOLE DIAMETER)
#6=8.0 (INSERT WIDTH)
#7=3.4 (PROCESSING DEPTH - ON RADIUS)
#8=30.0 (EFFECTIVE WORKING LENGTH ON Z AXIS)
#9=6000 (Z AXIS CUTTING SPEED)
#10=0.06 (INCREMENT OF EACH PASS)
#11=0 (WORKING ANGLE 0=CYLINDRICAL)
#12=15.0 (Z AXIS WORK START DISTANCE)
#13=0.2 (X AXIS WORK START DISTANCE)
#14=0.0 (LONGITUDINAL ERROR ON Z AXIS)
#15=45 (DEPARTURE ANGLE 90° /45°)
#16=2 (NUMBER OF FINISHINGS WITHOUT REMOVAL)
#17=0 (CODE G RETURN 0=1)
#18=8000 (Z AXIS FEED BACK)
#19=0 (ORIGIN X)
#20=0 (ORIGIN Y)
#21=8 (CODE M REFRIGERANT 0=OFF)

M98P8000

M30