1/4" Four-Flute ALL4 Chipbreaker Square End Mill

This Canadian-made Skookum End Mill combines a four-flute square-end design with integrated chipbreaker geometry for controlled material removal. Developed for high-temperature alloys and stainless steel, its ALL4 coating provides extreme resistance to heat, abrasion and wear during demanding machining operations.

Improved Chip Control in Heat-Intensive Materials

The chipbreaker geometry divides long chips into smaller, more manageable segments to support evacuation and reduce chip recutting. Its four-flute design provides cutting-edge strength and stability, while the ALL4 coating protects the tool during demanding profiling, pocketing and material-removal applications.

Product Specifications

• Application: High-Temperature Alloys and Stainless Steel (HTAS)
• Series: 680
• Cutting Diameter: 1/4"
• Number of Flutes: 4
• Length of Cut: 3/8"
• Overall Length: 2"
• Length Designation: Stub Length
• Shank Diameter: 1/4"
• Shank Style: Round
• End Style: Square
• End Configuration: Single End
• Chipbreaker: Yes
• Coating: ALL4 (Aluminum Chromium Titanium Nitride)
• Class: Orange
• Material: Solid Carbide
• Model: 4324678
• Made In: Canada

Typical Applications

• Machining high-temperature alloys and stainless steel
• Controlled roughing and material removal
• Profiling, pocketing and shoulder milling
• Applications requiring improved chip control
• Heat-intensive operations requiring high wear resistance

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.