pewe
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| posted on 4/2/10 at 11:21 AM |
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Need to drill a square hole?
Hadn't seen this before and I know it defies all logic but it's possible........
Cheers, Pewe 
PS Blake V V probably have to be used in a milling machine or similar as the side forces must be considerable.
http://www.ohgizmo.com/2009/10/07/square-holes-drilled-with-a-watts-drill-blows-my-mind/
[Edited on 4/2/10 by pewe]
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liam.mccaffrey
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| posted on 4/2/10 at 11:25 AM |
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wankel rotary engine anyone? cool though
Build Blog
Build Photo Album
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NigeEss
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| posted on 4/2/10 at 11:26 AM |
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Very clever, kinda reminds me of a Wankel engine though !
Dammit..too slow 
[Edited on 4/2/10 by NigeEss]
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Irony
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| posted on 4/2/10 at 11:27 AM |
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Interesting, I don't think I'll be putting one in cordless drill however.
That animation reminds me of a wankle engine.
Slow twice over on the wankle engine comment. Now I feel a right wankle.
[Edited on 4/2/10 by Irony]
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deezee
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| posted on 4/2/10 at 11:31 AM |
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WITCHCRAFT...... BURN THE WITCH 
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FFTS
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| posted on 4/2/10 at 11:47 AM |
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Is it just me or does this remind anyone else of a wankel engine?
Chris.
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blakep82
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| posted on 4/2/10 at 11:56 AM |
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it reminds me of something... i can't think what though
er, i guess it won't work in just any drill though?
________________________
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don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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adithorp
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| posted on 4/2/10 at 12:02 PM |
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I can't open the link at the moment but does it work like a Wankel engine? 
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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David Jenkins
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| posted on 4/2/10 at 12:10 PM |
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As the article says - it's not a new concept. In fact, if you drill a hole with a conventional 2-flute drill bit the resulting hole will be
slightly triangular. If you want a truly round hole you need to finish off with a reamer, which has many cutting edges and (usually) irregular spacing
between them to reduce oscillations.
It must be slightly scary to watch that drill work, as it has to rattle around a fair bit to do its job - bit like a Wankel rotor in fact! 
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scootz
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| posted on 4/2/10 at 12:13 PM |
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Hey... that works just like one of those funny Mazda engines. What do you call them again...
It's Evolution Baby!
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tegwin
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| posted on 4/2/10 at 12:16 PM |
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Presumably its more designed for milling applications rather than for bob to use with his hand drill :p
------------------------------------------------------------------------------------------------------------------------
Would the last person who leaves the country please switch off the lights and close the door!
www.verticalhorizonsmedia.tv
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Richard Quinn
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| posted on 4/2/10 at 12:21 PM |
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... and doesn't that take all the fun out of trying to fit a square peg into a round hole?
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blakep82
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| posted on 4/2/10 at 12:23 PM |
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quote:
Originally posted by scootz
Hey... that works just like one of those funny Mazda engines. What do you call them again...
ah, the mazda B series engine!
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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designer
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| posted on 4/2/10 at 12:29 PM |
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I bet the bits are expensive with all the side loads.
I once had to buy a lathe which 'turned' round bar into flat sided profile.
The bar went the normal way and the cutters, one cutter per surface, went the other! Swarf and coolant flew everywhere, all very complicated!
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mangogrooveworkshop
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| posted on 4/2/10 at 12:41 PM |
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fantastic
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mcerd1
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| posted on 4/2/10 at 01:10 PM |
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I bet you'll find some of your donor bits have holes like that in them
...so how do they do hexagonal ones then ??
[Edited on 4/2/10 by mcerd1]
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blakep82
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| posted on 4/2/10 at 01:34 PM |
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quote:
Originally posted by mcerd1
...so how do they do hexagonal ones then ??
would have thought they're more likely to be water/laser cut can't think of where these holes would be right enough
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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bodger
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| posted on 4/2/10 at 02:15 PM |
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Wankel Wankel Wankel! aaahh that's better
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Confused but excited.
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| posted on 4/2/10 at 02:19 PM |
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quote:
Originally posted by David Jenkins
As the article says - it's not a new concept. In fact, if you drill a hole with a conventional 2-flute drill bit the resulting hole will be
slightly triangular. If you want a truly round hole you need to finish off with a reamer, which has many cutting edges and (usually) irregular spacing
between them to reduce oscillations.
It must be slightly scary to watch that drill work, as it has to rattle around a fair bit to do its job - bit like a Wankel rotor in fact!
Only if it hasn't been sharpened/ground correctly.
Tell them about the bent treacle edges!
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mcerd1
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| posted on 4/2/10 at 03:15 PM |
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quote:
Originally posted by blakep82
quote:
Originally posted by mcerd1
...so how do they do hexagonal ones then ??
would have thought they're more likely to be water/laser cut can't think of where these holes would be right enough
what about up the up the middle of a pinto's dizzy shaft ?
I think cap head bolts are forged (allan key ones) but anything else like them.....
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blakep82
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| posted on 4/2/10 at 04:03 PM |
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never looked at a pinto dizzy, but i see what you mean about cap head bolts. i always just assumed they were cast or something. or milled
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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Alan B
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| posted on 4/2/10 at 04:14 PM |
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Non-round holes are either forged (Socket capscrews etc.) or broached (keyways, splines etc.) or if thin enough just punched out.
BTW, I think the word you are all thinking of is Wankel
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bimbleuk
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| posted on 4/2/10 at 04:22 PM |
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quote:
ah, the mazda B series engine!
Yep great engine for providing a stead supply of RWD chassis with very low milage. Yes I have an RX7 sat on my drive with blown apex seals. I bought
it like that though, the wankel engine will get sold for parts.
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boggle
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| posted on 4/2/10 at 10:50 PM |
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think ill stick with my waterjet......but i like the spirograph pattern in the middle.......
just because you are a character, doesnt mean you have character....
for all your bespoke parts, ali welding, waterjet, laser, folding, turning, milling, composite work, spraying, anodising and cad drawing....
u2u me for details
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gazza285
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| posted on 6/2/10 at 10:06 PM |
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I usually bray in my square section taper drift until the approximate size is reached, do the other side to even out the taper a bit, then grind off
the overspill. Its a bit rough mind, but works for the 'smithies.
DO NOT PUT ON KNOB OR BOLLOCKS!
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