Noga Deburring Tools UK Seller on ebay cheap !

[Lee Roberts]

No I wear tights ! There are three phases to a man's life -Believing in Santa - Not believing in Santa - Being Santa.

Seriously, I have a problem with drilling a 2mm thick aluminium plate* with 400 holes 3mm dia. The damn thing comes out like a cheese grater, with the top edge of the hole having a sharp raised lip. A bit of coolant cuts down the problem, but I don't know to get rid of this edge lift or burring. The only solutions I can think of, at the moment, are to slow the drill speed down -or- to redo the process but with a 90 degree chamfer bit, drilling to an appropriate depth i.e. 2.1mm, but that is going to add to the time to do these 20 plates and I certainly ain't deburring them by hand.

Any suggestions ?

* the ali plate is probably as soft as poodle poo, I don't know what grade it is.

Cheers,

Rob

BTW Lee - if this could go in a better thread or needs to be a new topic - please shift it. Ta - R.

Being Santa, a 7 and 10 year old - both girls....sorry!? lol

I've had the same problem, I'm actually after a countersink/chamfering bit recommendation please if anyone has got one to give.

I end up using a drill bit way bigger than the hole, just give it a quick turn by hand, works quite well on smaller holes, tried a few off ebay all seem to be crap, blunt or for wood.

Was thinking of adding a "Hand Tool" section to the forums so could split it, Metal Finishing Techniques may be a better place for your question though.