Htc 200-4250 Square End Mill 1/4 in 4 Flute Solid Carbide

Product Description

The HTC 200-4250 is a double-end, four-flute square end mill designed for milling operations in metalworking and machining environments. Built from solid carbide and coated with AlTiN (aluminum titanium nitride), it handles demanding cutting applications where heat resistance and tool life are critical. The mill measures 0.25 inches in diameter with a 0.5-inch length of cut and a 2.5-inch overall length. The right-hand helical flute geometry and square shank provide stable chip evacuation and consistent surface finishes. This tool is sized in the stub-length category, making it well suited for shorter-reach applications where rigidity is a priority.

The 200-4250 is used in production and job-shop milling of ferrous and non-ferrous metals, as well as hardened alloys where the AlTiN coating provides thermal protection. The double-end design extends usable tool life by offering two cutting ends per shank. It fits standard 1/4-inch collets and tool holders common on vertical machining centers, CNC mills, and manual knee mills. This tool is a practical choice for machinists and toolroom operators running profiling, slotting, and peripheral milling passes on close-tolerance parts.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• AlTiN coating improves heat resistance and extends tool life in dry or high-speed cutting
• Double-end design provides two usable cutting ends per tool
• Four right-hand helical flutes for efficient chip removal and finish quality
• Stub-length classification increases stiffness and reduces deflection in short-reach cuts
• Right-hand cutting direction compatible with standard CNC and manual mill spindle rotation

Compatibility

Designed for use in standard 1/4-inch collets and end mill holders on CNC machining centers and manual milling machines as part of the HTC Series 200 end mill line.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the shank to the proper insertion depth in the collet or holder per the tool holder manufacturer guidelines, and verify runout before beginning a cut. This tool is not centercutting and should not be used for direct plunge operations.