The CB counterbores are extensively used for recessing bolt and screw heads. Supplied with a HSS slow spiral drill bit. Fully adjustable, a hex key is supplied. TCT version is used for plywood, particle boards and plastics (abrasive). Use a drilling speeds only. Not suitable for ferrous and non-ferrous metals. When setting-up, ensure flutes of drill are aligned with flute of counterbore. For replacement Twist Drills, use slow spiral type e.g 501/532 to 501/012.
Specification:
D=3/4 inch|D=19.1 mm|D2=1/4 inch|D2=6.35 mm|OL=96 mm
Specification:
D=3/4 inch|D=19.1 mm|D2=1/4 inch|D2=6.35 mm|OL=96 mm
12 months
