Product

Long Neck End Mill Series
for Copper Electrode

Long Neck End Mill Series enable highly accurate copper electrode machining with minimal burrs.
Sharpness shearing ability and DLC coating innovated high quality copper electrode machining.
Realized long life machining on tough material of Copper Tungsten.

１．Shape of cutting edge

Adoption of sharper cutting edge to realize high precision machining by suppressing burr and deflection.

Long Neck Square DHR237

Using micro gash land to keep cutting ability while increasing the strength of the corner part.

Long Neck Ball
DRB230

Seamless on peripheral cutting edge and R realized high-quality machining by edge profile.

Long Neck Corner Radius DHR237R

Corner part with high shearing ability realizes high precision machining surface.

２．Helix angle of peripheral flutes

High helix angle improves shearing ability. Specialized 37.5° helix angle with high shearing ability and less contact point to reduce waviness.

Target Item

Long Neck Square　DHR237
Long Neck Corner Radius　DHR237R

Helix angle 37.5°（DHR237） 45°（General high helix angle type）
Tough point image
Cutting depth: 2D
Surface roughness Ra：0.075μm Ra：0.350μm
Processing streaks generated due to changes in contact points
Measuring instrument: NH-3SP

Abundant variation

End mill for copper electrode series with great size expansion from all 193 sizes to all 321 sizes.

For details, please see as following.


　　Square type (Total 74 sizes)　DHR237 　　



　　Ball type (Total 94 sizes) 　　DRB230 　　



　　Corner Radius type (Total 153 sizes) 　DHR237R 　　

Cutting data

Cutting data ① Comparison of cutting surface (Square type DHR 237)

　　


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Cutting data ② Tough-Pitch Copper comparison of tool life (Ball type DRB230)



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Cutting data ③　Copper tungsten alloy electrode model (Square type DHR237)

　　


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Cutting data ④　Comparison of curved surface and gradient surfaceNEW
（corner radius type DHR237R）



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