REPLACEABLE POINT DRILLS POWER/FORCE REQUIREMENTS Material: SAE 4340 Values change according to different materials and Speed: 330 SFM drilling conditions. Feed: .008 ipr QWIK•TWIST 8:1 DRILLS • In case of stationary applications- on lathes- a high Starter Hole Guide degree of radial and angular alignment between the chuck and the turret is required. • The recommended cutting parameters for 8:1 drills is 20% lower than the cutting speeds used for the 3:1 and 5:1 drills. Starter Hole Depth We strongly recommend the use of a 3:1 Qwik•Twist drill of the same diameter to drill a centering starter hole. The use of a centering starter hole improves hole location, accuracy, roundness, straightness and surface finish. 681