Countersinking alluminium

[julianf]

Just do the first one by eye and set the depth stop on the pillar drill, the depth of the rest will be pre set. Jobs a good un as they say.

What I mean is that the tip of the cutter may be too wide. I think it's m4 that I'm to do. That might not give me enough diameter to get into before I get to the cutting edge of the tool.

 

[julianf]

Just to update -

I purchased a cutter from bsa-regalcuttingtools on ebay.

I just paid for standard 2nd class, but gave them a call just to be sure it would be sent, as i needed it for friday.
Chap said he would make sure it went out yesterday.
Then sent me a mail to say that he had upgraded me to first class, FOC, so it would come today.

...which, sure enough, it has!

Ive tried it just by hand (as in in my hands) and it certainly seems to take off slithers of alloy on the test part.

Ive got a job coming off the machine in a moment, and ill test properly, but i suspect it will be good.

So, i would recommend bsa-regalcuttingtools on ebay - their service was better than i paid for!