New option of endmill process for HRC40~55

This product is recommended for high hardened steel machining from HRC40~55.

Product catalogue
(File size: 7MB)

Solid carbide endmills for pre-hardened steel

This is recommended for high speed machining of pre-hardened steel from HRC40~55 and hardened steel.
The tool cost is competitive compared to the equivalent tools of Japanese manufacturer.

Save tool cost

※Price comparison : company A is taken as 100.



Optimal tooth design for HRC40~55 workpiece.

This product allows to reduce cutting force and vibration.

This allows to extend tool life for high speed machining of pre-hardened steel and hardened steel.





Test data

Cutting condition:Tool diameter Φ10 x 4 flute, processed approx. 20m
ap=10mm、ae=3 V=150m/min Ｓ=4,777rpm fz=0.04mm F=764mm/min
Test result: YG 4G MILLS is the least wear amount.This is suitable for high speed machining of HRC40~55 workpiece!

  • YG　4G　MILLS

  • Other manufacturer endmill



Machining video







YG endmill series


  • For General Steels
    NEW CENTURY


  • For Stainless Steels
    V7 PLUS


  • For Heat Resistant Alloys
    Titanox　Power


  • For Pre-Hardened Steels (HRC40~55)
    4G　MILLS


  • For High Hardened Steels (HRC50~70)
    X5070


  • For Aluminum, Non-ferrous Metals
    ALU-CUT

 Appealing sales points

  • High speed and high efficiency machining

    High speed and high efficiency machining
    This excellent wear resistance allows to shorten machining time.

  • Wide products lineup

    Square, radius ball, and long neck are availale.

  • Regrinding and Re-coating

    Supported by certified factory.

edited by 　masashi shinki