4JJCRL (4 Flutes JJ 45° helix corner radius end mills for hardened steels)-JJ Tools

• Endmills for pre-hardened and hardened steels (HRc52~68)
• Good wear resistance by high quality Si-based PVD coating.
• High precise edge tolerance.
• Designed for minimizing edge chipping by corner R shape.
• 45° degree helix design for high speed, feed condition.
• Outstanding performance at high speed machining by ultra fine (0.2μm) WC grade.