To follow on from my other sharpening thread...
I've got some bits that I was using to drill hard stainless with (before I knew as little as I do now...!!) and they have overheated and gone blue at the tips. Is it still possible to sharpen them, by grinding off the damaged part until you get to the untouched metal lower down? Could do with some shorter drills anyway as the longer ones flex more in the lathe...
If they are HSS, they're still hard, Just sharpen them and admire the colour :-)
Mark Rand RTFM
...And buy some stub drills - I always prefer them for holes needing precise location. Wish they sold them in sets like normal length drills.
David
Oh, me too! A box of stub drills would be the handiest thing since sliced bread.Doesn't anyone know of a supplier? Pref. one that's not going to charge twice as much for half the amount of metal!
Zed
On Fri, 17 Nov 2006 00:32:17 +0000, David Littlewood
They do. Try RS 198-4836. But sit down before you look at the price. As a subsequent poster put it, 'twice the price for half the material'.
Is it not just easier to cut down a regular or blunt drill?
No. Not here on the left side of the pond. You just get drills with thich webs.
Chuck P.
That's what web thinning's for :-)
You want the thick web except at the end of the drill, don't you?
Mark Rand RTFM
Do you get thin ones on the right side of the pond ?
.-- Regards,
John Stevenson Nottingham, England.
Visit the new Model Engineering adverts page at:-
A problem is the web thickens towards the drill base..
regards Jonathan.
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