ULTRA High Performance 1/4" Four-Flute TiALN Square End Mill

This Canadian-made Skookum End Mill combines advanced variable-pitch geometry, a special helix and extra-fine sub-micro-grain carbide for demanding machining applications. Its four-flute square-end design delivers exceptional stability, cutting strength and wear resistance during high-performance profiling, finishing and production work.

Exceptional Strength and Chatter Resistance

The variable-pitch cutting geometry helps disrupt harmonic vibration for reduced chatter, improved stability and cleaner surface finishes. Its four-flute design supports productive feed rates where chip clearance permits, while the TiALN coating protects against heat, abrasion and premature wear when machining steels, stainless steels and cast iron.

Product Specifications

• Performance Series: ULTRA High Performance
• Cutting Diameter: 1/4"
• Number of Flutes: 4
• Length of Cut: 3/8"
• Overall Length: 2"
• Shank Diameter: 1/4"
• Shank Style: Round
• End Style: Square
• End Configuration: Single End
• Coating: TiALN (Titanium Aluminum Nitride)
• Helix: Special Helix Design
• Pitch: Variable Pitch to Reduce Chatter
• Material: 10% Extra-Fine Sub-Micro-Grain Carbide
• Carbide Strength: Extremely High Transverse Rupture Strength
• Diameter Tolerance: +0.0000"/-0.0015"
• Model: 2321181
• Made In: Canada

Typical Applications

• High-performance profiling and peripheral milling
• Shoulder milling and flat-bottom machining
• High-speed finishing and semi-finishing
• Machining steel, stainless steel and cast iron
• Production applications requiring exceptional stability and tool strength

Why Choose Skookum End Mills?

Skookum End Mills are made in Canada from premium micro-grain carbide for consistent performance, dependable accuracy and professional-quality results. Backed by more than 25 years of cutting tool experience, they are built to meet the everyday demands of machinists, fabricators and production shops.