High Performance 1/4" Four-Flute TiALN End Mill with .015" Corner Radius

This Canadian-made Skookum End Mill combines a .015" corner radius with a special helix and variable-pitch geometry for stable, high-performance machining. Its four-flute design supports productive profiling and finishing, while the small corner radius strengthens the cutting edges and produces a smooth internal fillet.

Stronger Cutting Edges with Reduced Chatter

The .015" corner radius reinforces the tool’s cutting edges to help reduce corner chipping during demanding operations. Variable-pitch geometry disrupts harmonic vibration for improved stability and surface finish, while the TiALN coating provides excellent resistance to heat, abrasion and premature wear when machining steels, stainless steels and cast iron.

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
• Corner Radius: .015"
• 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: 3321150
• Made In: Canada

Typical Applications

• Profiling with a small internal corner radius
• Shoulder milling and pocket finishing
• Finishing and semi-finishing operations
• Machining steel, stainless steel and cast iron
• Applications requiring stronger corners 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.