Carlyle 2.5mm HSS Cobalt 5% Drill Bit (CBD25)

Description

Genuine Carlyle · Part no. CBD25

The Carlyle CBD25 is a 2.5mm cobalt drill bit, M35 high speed steel with 5% cobalt, precision ground to DIN 338 with a self-centring 118-degree split point. 2.5mm is the tapping drill size for an M3 thread, so it is handy when tapping small threads in brackets and plates, as well as for pilot holes in steel and stainless.

Good to know

• Which tap goes with a 2.5mm hole? An M3 coarse thread; drill the hole, then cut the thread with an M3 tap using a little cutting fluid.
• How fast should I drill? Fairly fast at this size, but in stainless steel ease off and keep steady pressure so the bit keeps cutting instead of rubbing.
• What size comes next? For M4 threads the tapping size is 3.3mm, and for M5 it is 4.2mm, which this Carlyle range includes.

Which one?

The Carlyle 2mm HSS Cobalt 5% Drill Bit (CBD2) is one size down and the Carlyle 3mm HSS Cobalt 5% Drill Bit (CBD3) one size up. For M5 tapping, use the Carlyle 4.2mm HSS Cobalt 5% Drill Bit (CBD42).

Key features

• 2.5mm HSS cobalt drill bit
• Tapping size for M3 threads
• 118-degree split point
• M35 steel with 5% cobalt
• DIN 338

Specification