Combination valve guide core drill reamers allow you to eliminate the two step process of drilling then reaming to replace valve guides. High quality HSS construction for long life. A single pass will size the valve guide bore to 1/2" for press fitting of new 1/2" OD valve guide inserts. Select the appropriate tool shank diameter and shape for your Guide and Seat Machine.
Piloted valve guide core drills are manufactured from High Speed Steel and intended to be used in a Valve Guide and Seat Machine, Bridgeport style machine, or bed mill.
Piloted Valve guide core drills are designed to be used with piloted valve guide core reamers to achieve a final finished size for press fit guide installation.