Negative Rake Carbide Insert Bits, 10-Pack | Fits AMMCO Brake Lathes | Part #6914-10 Impact Wrench 5/16" Thick x 4" Long:

5/16" Thick x 4" Long: Wider profile and extra length for thorough prep of larger puncture injuries and thicker tire casings

The carbide bit cleanly preps the wound channel while the quick-change adapter ensures secure

Industrial-grade carbide with extended edge life under heavy load

39 in Gasket Thickness 0

Negative Rake Carbide Insert Bits, 10-Pack | Fits AMMCO Brake Lathes | Part #6914-10 Impact Wrench 5/16" Thick x 4" Long:Brake Lathe Details Replacement negative rake carbide insert bits for AMMCO bench brake lathes equipped with negative rake tool holders. The negative rake geometry generates a stronger, more shear resistant cutting edge than positive rake bits, making it the preferred choice for tougher, harder grade rotor castings and older composition materials where edge survival is the priority over cutting speed. Industrial grade carbide with extended edge life