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DIAMONDBACK DVH: 45 Degree Variable Helix – Primarily for high-speed machining of aluminum, and other non-ferrous materials including brass and bronze alloys.
The Diamond Back Rougher is designed for maximum Metal Removal Rates (MRR) in Non Ferrous Applications. Although the charts below depict a maximum chip load per tooth (IPT) value, your maximum may be lower due to machine horsepower, machine torque, toolholder and/or workholding. The “General Operating Range” is based upon 1X diameter (ADC / DOC) in full diameter (RDC / WOC) SLOTTING. The minimum chip loads remain constant for all applications, however, the maximum chip loads can be increased for side milling applications in finishing, heavy roughing & light roughing. We've successfully run our 3 flute, 3/4 diameter end mill in a slot 1.5" deep at at 14,000 RPM and up to a .040" chip load per tooth. Keep in mind the not all machines have the torque or horsepower necessary to handle these types of cuts.
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Diamond Back Speeds & Feeds for "N" Non Ferrous Materials
You can also find this table on Page 33 of our catalog
One of the most common causes of chatter with our tools is running tools with TOO LIGHT of a chip load. Most chatter problems can be fixed by INCREASING the chip load per tooth (IPT)
Heavy Roughing (Side Milling) Defined: ADC (Axial Depth of Cut) = up to 1X dia.diameter RDC (Radial Depth of Cut) = 30% – 50% of diameter Light Roughing (Side Milling) Defined: ADC (Axial Depth of Cut) = up to 1X diameter RDC (Radial Depth of Cut) = 15% – 30% of diameter Finishing (Side Milling) Defined: ADC (Axial Depth of Cut) = up to 1X diameter RDC (Radial Depth of Cut) = 4% – 15% of diameter |
Imperial
SFM = RPM X .262 X Tool Diameter RPM = SFM X 3.82 ÷ Tool Diameter IPM = RPM X IPT (CLPT) X Number of Flutes IPT = IPM ÷ (RPM X Number of Flutes) MRR = RDC X ADC X IPM (a.k.a. CIM) |