Jacobs 30239D 20N No. 5 Jacobs Taper Mount Ball Bearing Chuck 3/8 To 1 Inch Capacity K5 Key

Designed For Close Tolerance, Production Drilling On Precision Equipment. It Is Adaptable To A Wide Range Of Production Drilling Equipment, Jig Borers, Milling Machines, Lathes And Radials. Utilizing A Ball Thrust Bearing To Reduce Friction In The Chuck Closing Mechanism, It Permits The Application Of More Gripping Force On Drill Shanks To Maximize Drilling Torque Under The Most Demanding Machining Conditions.