Noga Deburring Tools UK Seller on ebay cheap !

[mekanik]

Hi Rob
If i have to drill plate, i don't use a standard grind drill. i grind the size required flat bottom, then relieve it to leave a point in the centre(like a wood drill) this trapanes the hole and breaks through relatively clean, a bit off pecking might help.
regards
Mike

[cropwell]

Hi Rob
If i have to drill plate, i don't use a standard grind drill. i grind the size required flat bottom, then relieve it to leave a point in the centre(like a wood drill) this trapanes the hole and breaks through relatively clean, a bit off pecking might help.
regards
Mike

I haven't got the skill or patience to do regrinding of small drills !

What I am using is a 3.05 carbide drill from this guy http://www.circuit2u.co.uk/epages/63...rill%20Bits%22 He supplies 1st regrind bits at a good price. I am pecking the hole, but am going to play around with the peck and spindle speeds to see what happens.

Cheers,

Rob