Center Drill Bits

[bogstandard]

About the cheapest spot drills in the UK I have found are here. Put a search in for all diameters and go to the bottom of the second page then the third.

http://www.engineeringsupplies.co.uk...11=192&12=&13=

They are very good quality, both the Cobalt and Carbide, and if not really abused, should last almost forever. For £20 to £30 you can kit yourself out with a decent range of sizes and angles up to 8mm, over that, as in all places, they get expensive.

I tend to use the 120 degree ones, as that almost matches the standard grind of a normal twist drill of 118 degs. For holes that have a countersink requirement, I use the larger 90 degree ones to do the countersink first, then drill down with a normal drill from that, two ops in one.

Hope this helps

Bogs

[alan2525]

Caveat emptor, I've gone back to Plan A, don't use anything but Dormer :D

Dormer aren't what they used to be...I picked up a set of drills, made in Mexico of all places. Drilled a hole in a piece of 1/4" mild steel and managed to snap a brand new 10mm drill bit straight in half with just the torque from a cordless drill and in a hand tightened QR chuck too!

That's the first time I've ever managed to break a drill over about 4mm in diameter!

Complete carp!