What’s the advantage of 45-degree helix angle than 35 degrees of solid carbide endmills?
Tungsten steel end milling cutter is also called cemented carbide end milling cutter. The hardness of the cutter itself is generally between hra88-96 degrees.
However, the finished tool is generally called by the hardness of the processed material: such as 45 degree end mill, 50 degree end mill, 60 degree end mill, 65 degree end mill and 70 degree end mill. The degree behind the number refers to the hardness of the processed material, and the unit is HRC Rockwell hardness, which also refers to the hardness that can be processed. 50 degree milling cutter can process HRC50 degree steel, such as S136 die steel.
The difference between them are life and finishing process. The higher the helix angle, the smoother the workpiece. But the lower the helix angle, the more durable, so the 35-degree life span is higher.
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