User Guide

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Endmills - Technical Info
Endmills
- Tech Info
After reaching the desired entry hole depth in Step
1, and with the end mill still at depth, expand the
hole outwards using the feed rate adjustment found
in the chart below. Continue until the entry hole is
enlarged to the expanded diameter shown at right.
Once the expanded entry hole diameter is achieved,
climb cut machining can begin at 100% of the
Peripheral-HEM values in the feed and speed chart
for the tool series you’re using.
Method B will expand the entry hole by doing a second
helical ramp entry hole of a larger diameter than in Step
1. After completing Step 1, retract the end from the hole,
and machine the second helical ramp entry hole using
the same speed, feed and location as the first hole.
Once the expanded entry hole diameter is achieved,
climb cut machining can begin at 100% of the
Peripheral-HEM values in the feed and speed chart for
the tool series you’re using.
Method #2 – Expand the entry hole with a second helical ramp move.
Method #1 – Expand the entry hole from inside out.
Tool Series
Expanded
Hole ø
Feed Rate
Adjustment
Step-Over
Adjustment
XHP 9 Flute
Finishers
3 x D IPT x .75 RDOC x .5
XHP 11 Flute
Finishers
3.75 x D IPT x .75 RDOC x .5
XHP 13 Flute
Finishers
3.75 x D IPT x .75 RDOC x .5
D = Tool Diameter
removed
in step 1
CCW path
expanded hole
CW path
expanded hole
removed
in step 1
D = Tool Diameter
CW = Clockwise
CCW = Counter-Clockwise
Tool Series
Expanded
Hole ø
Feed Rate
Adjustment
Ramp
Angle
XHP 9 Flute
Finishers
3 x D IPT x 1.6 0.5°
XHP 11 Flute
Finishers
3.75 x D IPT x 1.6 0.5°
XHP 13 Flute
Finishers
3.75 x D IPT x 1.6 0.5°
Step 2: There are two common methods to enlarge an existing hole.
Expanded Hole Ø per Chart
F&S adjustments
per chart