High Speed Steel Bright Fractional Combined Drill & Countersink (Center Drill)
When metal parts are machined on centers, as in turning or cylindrical grinding, it is always necessary to drill and countersink the center holes to serve as seats or bearings in the machine centers.
Features:
Made from general purpose HSS
Bell type with 60° chamfer and additional 120° chamfer for protection
Bright finish for added lubricity
Double ended for twice the life
Applications:
For drilling a center hole when mounting a part in a machining center
Technical Tip:
Speed, feed, and lube are all critical to cutting tool performance
