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

This Canadian-made Skookum End Mill combines a special helix, variable-pitch geometry and a wear-resistant TiALN coating for stable, high-performance machining. Its four-flute square-end design supports productive profiling, shoulder milling and flat-bottom cutting in steels, stainless steels and cast iron.

Variable-Pitch Stability with Reduced Chatter

The variable-pitch cutting geometry helps disrupt harmonic vibration, reducing chatter and improving surface finish during demanding machining operations. Four flutes provide excellent cutting-edge strength and support higher feed rates where chip clearance permits, while the TiALN coating improves resistance to heat, abrasion and premature wear.

Product Specifications

• Performance Series: 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% Micro-Grain Carbide
• Diameter Tolerance: +0.0000"/-0.0020"
• Model: 3321149
• Made In: Canada

Typical Applications

• High-performance profiling and peripheral milling
• Shoulder milling and flat-bottom machining
• Finishing and semi-finishing operations
• Machining steel, stainless steel and cast iron
• Applications requiring improved stability and reduced chatter

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.