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.
Specifications: • Dia Metric: 9.
5 • Dia Imperial: 3/8 • Dia2 Metric: 4.
76 • Dia2 Imperial: 3/16 • Overall Length Metric: 85 • Type or Grade: TCT