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Post by dickdastardly40 on Mar 7, 2008 23:49:00 GMT
At the exhibition in W Mids in Oct, I bought a set of Dormer A02 1 - 6mm in 0.1 increments Split point jobber drills which cost an absolute arm and leg as I was sick of the usual sets being made of cheese or not drilling straight. Tonite with SWMBO at an Ann Summers party and the nipper at the grand parents I had my first opportunity to venture t the garage and try them in anger. Drilling in the headsstock job in the vertical slide, set up with a centre on scribed lines, swap for chuck. What a revelation! no need to centre pop, no wandering tip lovely matching length spirals of swarf. Marked out set up and drilled 28 x 2.6mm holes very quickly. Very impressed, as I said, very spendy but good performance so far. ;D She'll be back any minute reeking of booze so my evening may improve even more. Al
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Post by baggo on Mar 8, 2008 0:53:52 GMT
She'll be back any minute reeking of booze so my evening may improve even more. Depends on what she brings back from the party !
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Post by houstonceng on Mar 8, 2008 10:48:41 GMT
Al
What so you mean by "split-point drills" ? Not sure I've come across the terminology. Any chance of a photo ?
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waggy
Statesman
Posts: 747
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Post by waggy on Mar 8, 2008 14:29:07 GMT
Hello all,
I wondered what such a drill was? Have a look on Google, search for "Split point drills". All will be revealed. No wonder they were expensive, definitely not a hand sharpening job!
Waggy.
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Post by dickdastardly40 on Mar 8, 2008 15:04:10 GMT
Split point drills are ground at 135 deg as opposed 118 deg and then an extra back clearance is ground on to create 4 facets. The tip is a point instead of a chisel which is why it doesn't wander. I'll try and photo one later for clarification if the above isn't clear.
Al
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hudson
Involved Member
Posts: 92
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Post by hudson on Mar 8, 2008 18:21:41 GMT
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hudson
Involved Member
Posts: 92
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Post by hudson on Mar 8, 2008 23:07:18 GMT
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