Osg HP441-1575 Square End Mill 0.1575 in 4 Flute Carbide

Product Description

The OSG HP441-1575 is a solid carbide square end mill engineered for precision milling in demanding shop environments. This single-end tool features a 0.1575 inch diameter cutting head, a 0.5512 inch length of cut, and four spiral flutes ground from micrograin carbide stock. The TiAlN coating extends tool life by reducing heat buildup at the cutting edge during high-speed operations. With a 35-degree helix angle and centercutting capability, it handles both peripheral and plunge cuts in ferrous and non-ferrous materials. Licensed machinists and tool-and-die professionals rely on this series for close-tolerance finishing and slotting work.

The HP441-1575 is suited for vertical machining centers, CNC mills, and manual knee mills where a 4 mm shank toolholder is employed. Its regular-length geometry fits standard collet chucks and end mill holders. The right-hand cut and right-hand flute configuration matches conventional climb and conventional milling setups. Typical applications include pocketing, contouring, and slotting operations in steel, stainless, cast iron, and hardened materials where a small-diameter, high-performance carbide end mill is required.

Key Features

• Micrograin solid carbide construction for extended tool life in hard materials
• TiAlN finish reduces thermal wear and supports dry or minimal-coolant cutting
• 35-degree helix angle improves chip evacuation and reduces cutting forces
• Centercutting design allows direct plunge entry without a pre-drilled hole
• Four-flute spiral geometry provides a superior surface finish on finishing passes
• Right-hand cut and right-hand flute for standard CNC and manual mill setups

Compatibility

Designed as an OEM-style replacement or direct-procurement end mill for applications requiring a 4 mm diameter, 4-flute solid carbide square end mill in the HP441 series from OSG.

Installation Notes

Installation is performed by qualified machinists or CNC setup technicians. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully in the collet or end mill holder and torque the retention nut to the toolholder manufacturer's specification. Verify runout with a dial indicator before initiating a cut, as excessive runout will accelerate wear on a small-diameter carbide tool.