Heavy duty construction manufactured from HSS and cobalt for increased hardness and durability with 6 flutes for improved cutting performance and chip control.

Features and Benefits
• HHS-Co construction for improved hardness
• 6 flutes for improved chip control and cutting efficiency

Typical Applications
• Countersinking

Standards
• Manufactured to BS 328:Part 5:1983

Counterbores N with a diameter of 50mm and larger are all made with a driving lip. These sizes should be used in the appropriate type M toolholder.

Dimensions (mm) N, NA & W
Counterbores N, and NA with Ø of 50 mm and larger are all made with a driving lip. These sizes should be used in the appropriate type M toolholder
d: 14.0; d1: 6.0; L: 48.0; L1: 28.0.

Series J100 - Metric general purpose drills for steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite.

Features and Benefits
• High speed steel construction with bright finish for increased toughness
• Supplied in the as-ground condition for use with non ferrous materials

Standards
• Manufactured to BS 328/DIN338RN

Notes
• Drills with a bright finish are supplied in the as-ground condition and such tools are used generally in the machining of non-ferrous materials.

HSS-E 90° straight shank single hole countersinks feature a hardy cobalt steel construction, ideal for deburring and chamfering.

Features and Benefits
• HSS-E cobalt steel construction for increased toughness
• Suitable for deburring and chamfering applications
• Available in a range of metric measurements

Typical Applications
• Deburring
• Chamfering

Standards
• Manufactured to BS 328 : Part 5:1983