#4 High Speed Steel Center Drill Bit and Countersink, 60 deg. Angle

Drillco #4 High Speed Steel Center Drill Bit and Countersink, 60 deg. Angle

350E004

#4 High Speed Steel Center Drill Bit and Countersink, 60 deg. Angle by Drillco, available to order from Flexible Assembly Systems. Do you see this Center Drill Bit and Countersink available for a much lower price? Contact Customer Service about Price Matching!

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. Plain Type is the most commonly used combined drill & countersink. Bell Type is used if the parts to be machined are to pass through a number of subsequent handlings, where there is danger of marring the edges of the center holes. They have an additional small 120° chamfer to protect the edges of the 60° hole.