Carlyle 9mm HSS Cobalt 5% Drill Bit (CBD9)

Description

Genuine Carlyle · Part no. CBD9

The Carlyle CBD9 is a 9mm cobalt drill bit, M35 HSS with 5% cobalt to DIN 338, with a three-flat shank and a 130-degree split point. 9mm is the medium clearance hole for an M8 bolt, one of the commonest bolts on brackets and trailer parts, so this is the bit to use when a bolt needs to pass through steel.

Good to know

• Is 9mm right for an M8 bolt? Yes, as a medium-fit clearance hole with a little room to line parts up.
• Should I drill straight to 9mm? In steel, pilot first with a smaller bit; it keeps the hole on the mark and saves the drill working so hard.
• What about the bare metal edge afterwards? Deburr it and prime or paint it, especially on car bodywork, so the new hole doesn't rust.

Which one?

For M10 threads, the Carlyle 8.5mm HSS Cobalt 5% Drill Bit (CBD85) is the tapping size. The Carlyle 9.5mm HSS Cobalt 5% Drill Bit (CBD95) is a size up.

Key features

• 9mm HSS cobalt drill bit
• Medium clearance size for M8
• Three-flat shank
• 130-degree split point
• M35 steel, 5% cobalt, DIN 338

Specification