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Helically Interpolating a Hole at 225 IPM Through a Milled Slot
with Toroid End Mill and RHINO-CARB™ Inserts from Dapra
This video demonstrates Dapra's 1" Toroid End Mill executing the helical interpolation of a 1.75" diameter hole to a depth of 1.25". The material is H13, and the machine tool used is a Fadal 4020 with a 40-taper spindle.
Hole making with helical interpolation provides fast metal removal without significant spindle load or stress on the machine tool. It also allows for hole making to begin on a less than ideal surface, as the video demonstrates. In this case, the top 1/2" of the hole is made through an existing slot, a function not possible with a drill. Additionally, helical interpolation allows many hole sizes to be achieved with one tool, also not possible with a drill.
The parameters for this video are:
Helixing Steel - 225 IPM
1" Toroid End Mill (2 Flute)
1018 Low-carbon Steel
1200 SFM (4600 RPM)
.025" IPT (225 IPM)
1.75" Hole Diameter
1.25" Total Depth
40 Taper VMC
For more cutting demonstrations, please visit Dapra’s Tool Demo Site (http://www.dapra.com/tech/videos.htm)