1/4" Four-Flute ALL4 Chipbreaker Corner-Radius End Mill

This Canadian-made 1/4" carbide end mill combines four-flute geometry, a substantial 0.060" corner radius and an integrated chipbreaker for controlled material removal in demanding applications. Its ALL4 coating provides exceptional resistance to heat, abrasion and wear when machining high-temperature alloys and stainless steel.

Maximum Edge Strength with Improved Chip Control

The chipbreaker geometry helps divide long chips into smaller, more manageable pieces for improved evacuation during heavy material removal. A 0.060" corner radius significantly reinforces the cutting edge to help reduce chipping, while the stub-length construction provides dependable rigidity and stability.

Product Specifications

• Application: High-Temperature Alloys and Stainless Steel (HTAS)
• Series: 680
• Cutting Diameter: 1/4"
• Flute Count: 4
• Length of Cut: 3/8"
• Overall Length: 2"
• Length Designation: Stub Length
• Shank Diameter: 1/4"
• Shank Style: Round
• End Style: 0.060" Corner Radius
• Cutting Ends: Single End
• Chipbreaker: Yes
• Coating: ALL4 (Aluminum Chromium Titanium Nitride)
• Class: Orange
• Material: Solid Carbide
• Product Code: 4324681
• Made In: Canada

Typical Applications

• Machining high-temperature alloys and stainless steel
• Roughing and controlled material removal
• Profiling and shoulder milling
• Pocketing with reinforced internal corners
• Heat-intensive operations requiring edge strength and chip control

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.