END MILL CARBIDE FI 4.0 11/57 Z4 HA6 VHM TS 440N MASTERMILL 440N

Precision-ground from solid carbide, the Mastermill 440N end mill delivers a 4.0 mm cutting diameter with a 57 mm overall length and 4 flutes for high-performance machining of steel and stainless steel up to 45 HRC. Its DIN 6527 geometry ensures reliable slotting, profiling, and finishing in demanding production environments.

Overview

This end mill is engineered for general purpose machining where rigidity and chip evacuation are critical. The cylindrical HA shank with 6 mm diameter and h6 tolerance provides secure clamping in standard collets and hydraulic holders. The bright, uncoated finish preserves sharp cutting edges, while the progressive core diameter enhances stability during deep cuts.

What stands out

• Solid carbide (VHM) construction for superior wear resistance
• 4-flute design balances chip load and surface finish
• Square end geometry for flat-bottom slots and shoulders
• Right-hand cut with standard helix angle for versatile use
• DIN 6527 compliance ensures interchangeability

Technical details

• Cutting diameter (Dc): 4.0 mm
• Shank diameter (Ds): 6 mm (cylindrical, HA)
• Cutting length (Lc): 11 mm
• Overall length (Lo): 57 mm
• Number of flutes: 4
• Shank tolerance: h6
• Coating: Uncoated / bright finish
• Helix angle: Standard (30–35°)
• Recommended workpiece hardness: up to 45 HRC
• Applications: Slotting, profiling, finishing

Our verdict

The Mastermill 440N is a dependable workhorse for machinists who need consistent performance in steel and stainless steel without the complexity of coatings. Its solid carbide build and precise geometry deliver clean cuts and long tool life in everyday milling tasks.