Hertel E1034020 Square End Mill 5/16 in 4 Flute Hss

Product Description

The HERTEL E1034020 is a 4-flute, single-end square end mill ground from M7 high speed steel. It carries a 5/16-inch cutting diameter with a 1-3/8-inch length of cut, a 3/8-inch shank diameter, and a 3-1/8-inch overall length. The 30-degree spiral flute geometry promotes chip evacuation and balanced cutting forces across a range of ferrous and non-ferrous workpiece materials. This tool ships uncoated and is designed for right-hand cut with right-hand flute direction. Machinists and tool room operators working with manual mills, CNC knee mills, or VMCs are the primary users of this style of end mill.

This end mill fits long-series applications where standard-reach tooling cannot access the required depth. The 1-3/8-inch length of cut accommodates slots, pockets, and peripheral milling passes that fall within the 1.25-inch to 1.5-inch cut-depth range. It is well suited to general-purpose milling of low-to-medium alloy steels, tool steels, cast iron, and aluminum in both job shop and maintenance environments. The non-center-cutting geometry means plunge entry is not recommended without a pre-drilled lead hole or ramping strategy.

Key Features

• M7 high speed steel construction provides good toughness and wear resistance for general-purpose milling
• 30-degree helix angle promotes smooth chip flow and reduced cutting force
• 4-flute design balances material removal rate with chip clearance
• Long-series length of cut (1-3/8 inches) reaches deeper slots and pockets than stub or standard-length tooling
• Right-hand cut, right-hand flute configuration suits conventional and climb milling on standard spindles
• Uncoated finish allows resharpening without coating concerns

Compatibility

Designed as an OEM-style replacement or direct-fit end mill for any standard milling machine, machining center, or mill-drill that accepts a 3/8-inch straight shank tool holder, collet, or end mill adapter.

Installation Notes

Installation is performed by a machinist or toolroom technician. The machine spindle must be at a full stop and the drawbar or collet nut fully tightened before any cutting operation begins. Verify runout with a dial indicator after chucking, as excessive runout accelerates edge wear and degrades surface finish. Because this tool is not center-cutting, avoid direct axial plunging into solid material.