Model Engine Maker
Supporting => Tooling & Machines => Topic started by: Arbalest on January 24, 2013, 09:48:04 AM
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What's the perceived wisdom from you guys :naughty: could a spotting drill be used to cut small vee's in mild steel?
http://www.ebay.co.uk/itm/12MM-NC-SPOTTING-DRILL-90-DEGREE-COBALT-SPOT-DRILL-NEW-/140832548121?_trksid=p3284.m263&_trkparms=algo%3DSIC%26its%3DI%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D21%26pmod%3D130761436090%26ps%3D54
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I used to do that sort of thing regularly, when I worked for a living.
A cobalt drill would perform better than "my" hss regrinds used to do! :ThumbsUp:
Don't go deeper than the depth of the point angle. There's no side relief on a spotting drill........
David D
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Do they sell "drill mills"
http://www.use-enco.com/CGI/INSRIT?PMAKA=308-0227&PMPXNO=9404927&PARTPG=INLMK32
over there? They're made to do what you wish to do.
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I used the kind of cutter Marv show above here:
http://www.modelenginemaker.com/index.php/topic,630.0.html (http://www.modelenginemaker.com/index.php/topic,630.0.html)
--Tim
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Thanks guys, I've been wondering the same thing and I'm just getting ready to place an Enco order.
I think they are even on sale.
Eric
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Do they sell "drill mills"
http://www.use-enco.com/CGI/INSRIT?PMAKA=308-0227&PMPXNO=9404927&PARTPG=INLMK32
over there? They're made to do what you wish to do.
They possibly do, Marv. But, I've never come across them...... :-\
David D
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Considering the differences between our languages, it's possible that they're known by an entirely different name.
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As said, they're not easy to get over here Marv.
I found this supplier a little while ago but look at the price!
http://www.cutweltools.co.uk/files/ww/FT%20A165.pdf
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:headscratch: - a good quality 3-flute 90o countersink bit might also do the job...:
Sort of like this one: http://www.somta.co.za/cat/761.htm (http://www.modelenginemaker.com/http:/www.somta.co.za/cat/761.htm)
Needs a bit of clearance for the tip though, so you might have to use a small slot mill to cut that. Or even a slitting saw with the part in another set-up.
Kind regards, Arnold
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I used a cheap countersink to cut this vee in the peatol, but as Arnold says, its best to cut a narrow slot with a slot drill/hacksaw/slitting saw etc.
(http://i1184.photobucket.com/albums/z329/PEATOLUSER/VCUTTING.jpg)
I even cut a larger vee with a 1/2 dia. countersink, and although i cabbaged the teeth (forgot to change speeds when i swopped from small slot to countersink) it still produced a decent job.
yours
peter
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As luck would have there was a 10mm solid carbide one on eBay. I got it for ?10.00 inc post, list price is ?56.00 +!