Sgs 00645 Square End Mill 0.04 in 4 Flute Solid Carbide

Product Description

The SGS 00645 is a solid carbide square end mill designed for precision milling operations in metalworking and machining applications. With a 0.04 inch cutting diameter and a 0.48 inch length of cut, this tool is built for tight-tolerance work in confined geometries. The four-flute, right-hand spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and smooth cutting action. The micrograin carbide substrate delivers hardness and wear resistance suited to demanding cut conditions. The bright, uncoated finish keeps the tool at its ground diameter without added coating thickness, which is critical at this scale.

This end mill is used in CNC machining centers and manual mills for slotting, profiling, and peripheral milling in ferrous and non-ferrous materials. Its extended length type and 0.125 inch straight-cylindrical shank make it compatible with standard collet chucks and end mill holders commonly found in production and toolroom environments. The centercutting geometry allows plunge entry. It is suited to applications where small-diameter precision cutting is required, such as die and mold work, medical component machining, and detailed aerospace features.

Key Features

• 0.04 inch cutting diameter with a diameter tolerance of +0.000 to -0.001 inch for tight-fit applications
• 4-flute right-hand spiral geometry with 30-degree helix for balanced chip load and surface finish
• Centercutting design allows direct plunge entry without pre-drilling
• Micrograin solid carbide construction for hardness and edge retention in demanding materials
• Bright, uncoated finish maintains true ground dimensions — important at sub-0.050 inch diameters
• Straight-cylindrical 0.125 inch shank fits standard collets and end mill holders

Compatibility

Designed as an OEM-style replacement and standard tooling option for CNC machining centers and manual mills accepting a 0.125 inch straight-cylindrical shank with compatible collet or end mill holder.

Installation Notes

This tool should be installed and adjusted by a qualified machinist or CNC tooling technician. Ensure the machine spindle is fully powered down and locked out before changing tooling. Verify collet bore and holder runout before seating the shank, as excessive runout at this diameter will accelerate tool wear or cause breakage. At 0.04 inch diameter, feed and speed parameters must be calculated carefully — consult the cutting tool manufacturer data or machining handbook for appropriate starting values.