CHAMFER RINGS DRILLING AND CHAMFERING IN ONE OPERATION Mounting Instructions: 1 Insert the Chamfer Ring on the drill body and slide to the desired position .(1) 2 Rotate the ring clockwise until the stopper engages the flute edge. 3 Tighten the ring clamp screw according to the maximum tightening torque indicated in the table below. 4 Mount the chamfer insert. (Torque 35 in. lbs.). 5 Mount the Qwik•Twist Drill Point.. (1) Mount the ring on the drill body subject to the limitations shown in the drawing to the right and the position possibilities in the table “Chamfer Ring Position Range” on the next page. Maximum Tightening Torque- Ring Clamp Screw Ring Number Ring Clamp Screw Torque CB100-01 thru CB150-01 SD050-A5 62 in. lbs. CB160-01 thru CB200-01 SD060-20 88 in. lbs. Before drilling insure that: • There exists a very small gap beween the chamfer insert and the drill body, but without contact (i.e., chamfer insert should not be in contact with the drill body). • The cutting edge point (45˚) is aligned with the flute edge. 682