The Hunter 221-640-3 is a premium-grade carbide cutting insert engineered specifically for professional automotive brake service. Featuring a 15-degree positive rake angle, this insert delivers highly efficient chip removal and a smooth surface finish when resurfacing brake rotors and drums. Its durable tungsten carbide construction ensures exceptional longevity and resistance to heat-wear under high-volume shop conditions.

Key Features:

• Premium Carbide Construction: Manufactured from high-density micro-grain tungsten carbide for maximum edge retention and extended tool life.
• 15° Positive Rake Geometry: Optimized for smoother cuts, lower cutting forces, and excellent surface finish results on both drums and rotors.
• Precision Tip Radius: Features a 0.015" radius tip designed for reliable accuracy and strict tolerance control.
• Multi-Edge Utility: Engineered with multiple cutting edges to maximize the value per insert before replacement is required.

• Hunter Models: Direct fit for Hunter BL300, BL500, BL505, OCL360, OCL400, and OCL430MD brake lathes.
• Cross-Compatibility: Fits select Ammco models, including the 3850, 4000, and 7000 series, when utilizing compatible positive rake tool holders.

• Specifications