23
3.
Precisely mark the center of the hole, and use the tip of the twist drill to position the
machine and in the correct position, with the tip of the twist drill to meet the marked center
of the hole.
Steps 4-12: see chapter Annular cutters. Make sure the machine runs at maximum speed for
twist drills!
5.4 Countersinks
Thanks to its wide range of operating speeds, the machine can also be used for reaming or counter-
sinking.
Follow the steps mention in chapter Twist drills
0800 536 774
www.globalweldingsupplies.com
13 Patiki Road Avondale, Auckland 1026