casper ghost Posted April 20, 2018 Report Share Posted April 20, 2018 I'm sure this isn't supposed to happen ! 1 Link to comment Share on other sites More sharing options...
Sir Nibble Posted April 20, 2018 Report Share Posted April 20, 2018 I once had a drill. "catch"and actually straighten out the spiral flutes. Link to comment Share on other sites More sharing options...
casper ghost Posted April 20, 2018 Author Report Share Posted April 20, 2018 Just now, Sir Nibble said: I once had a drill. "catch"and actually straighten out the spiral flutes. I'm afraid that without photo evidence we don't believe you. Link to comment Share on other sites More sharing options...
Sir Nibble Posted April 20, 2018 Report Share Posted April 20, 2018 1 minute ago, casper ghost said: I'm afraid that without photo evidence we don't believe you. The same set also included one spiraled the wrong way and they all bent. Pound shop. Link to comment Share on other sites More sharing options...
zenataomm Posted April 20, 2018 Report Share Posted April 20, 2018 Looks useful for drilling round corners Link to comment Share on other sites More sharing options...
casper ghost Posted April 20, 2018 Author Report Share Posted April 20, 2018 1 minute ago, Sir Nibble said: The same set also included one spiraled the wrong way and they all bent. Pound shop. My brother bought this set and I know he occasionally goes in a pound shop so could be right.. Link to comment Share on other sites More sharing options...
cuthound Posted April 20, 2018 Report Share Posted April 20, 2018 I thought perhaps been bought in the Photoshop? Link to comment Share on other sites More sharing options...
Chewbacka Posted April 20, 2018 Report Share Posted April 20, 2018 Someone was pushing down hard when using a wood drill. Link to comment Share on other sites More sharing options...
casper ghost Posted April 20, 2018 Author Report Share Posted April 20, 2018 36 minutes ago, Chewbacka said: Someone was pushing down hard when using a wood drill. I would have expected it to snap, not bend to 90 degrees.. it wouldn't even drill into MDF.. Link to comment Share on other sites More sharing options...
Cheshire cat Posted April 23, 2018 Report Share Posted April 23, 2018 It will be ok for stirring paint Link to comment Share on other sites More sharing options...
MtB Posted April 24, 2018 Report Share Posted April 24, 2018 On 20/04/2018 at 12:40, Sir Nibble said: The same set also included one spiraled the wrong way and they all bent. Pound shop. Probably a left hand drill bit. There is a specific use for them, but I can’t remember what! Link to comment Share on other sites More sharing options...
Tonka Posted April 24, 2018 Report Share Posted April 24, 2018 I think you are digging a hole Link to comment Share on other sites More sharing options...
WotEver Posted April 24, 2018 Report Share Posted April 24, 2018 6 hours ago, Mike the Boilerman said: Probably a left hand drill bit. There is a specific use for them, but I can’t remember what! They’re for Australians. Obviously one of them went to the wrong export market. Link to comment Share on other sites More sharing options...
nicknorman Posted April 24, 2018 Report Share Posted April 24, 2018 (edited) 7 hours ago, Mike the Boilerman said: Probably a left hand drill bit. There is a specific use for them, but I can’t remember what! For extracting broken bolts/studs etc Edited April 24, 2018 by nicknorman Link to comment Share on other sites More sharing options...
Neil Smith Posted April 24, 2018 Report Share Posted April 24, 2018 8 hours ago, Tonka said: I think you are digging a hole Certainly won't be drilling one. Neil Link to comment Share on other sites More sharing options...
MtB Posted April 24, 2018 Report Share Posted April 24, 2018 (edited) 2 hours ago, nicknorman said: For extracting broken bolts/studs etc Possibly, but I cant see it matters much what you use the drill the hole for an 'easy-out' stud extractor. I think there is a better use for a LH twist drill, but I can't think of it! Edited April 24, 2018 by Mike the Boilerman Link to comment Share on other sites More sharing options...
Boat&Bikes Posted April 24, 2018 Report Share Posted April 24, 2018 11 minutes ago, Mike the Boilerman said: Possibly, but I cant see it matters much what you use the drill the hole for an 'easy-out' stud extractor. I think there is a better use for a LH twist drill, but I can't think of it! Have used left hand bits a lot over the years, mainly on Japanese motorcycles. Often they will unscrew the broken bolt without needing to use an extractor. 1 Link to comment Share on other sites More sharing options...
nicknorman Posted April 24, 2018 Report Share Posted April 24, 2018 1 hour ago, Mike the Boilerman said: Possibly, but I cant see it matters much what you use the drill the hole for an 'easy-out' stud extractor. I think there is a better use for a LH twist drill, but I can't think of it! As per Ian's post, a LH drill may well extract the stud on its own, but even if an extractor is subsequently required at least it hasn't further tightened the broken stud whilst drilling. If you can think of a better use, you are a better man than me! (not hard!). Link to comment Share on other sites More sharing options...
Iain_S Posted April 24, 2018 Report Share Posted April 24, 2018 3 hours ago, Mike the Boilerman said: Possibly, but I cant see it matters much what you use the drill the hole for an 'easy-out' stud extractor. I think there is a better use for a LH twist drill, but I can't think of it! The snag with extractors is that the load is concentrated on a few threads near the top, and no torque is exerted further down the broken bolt/stud. If the hole drilled is too small, it is easy to break the smaller extractor. If the hole is too large, the broken stud can be expanded to make it even tighter. The left handed drill distributes heat all the way down the stud, and grips lightlyfor the whole length of the drill within the stud. Unlike with extractors, I have never had a failure with a left hand drill, even when the last bit of the stud to be removed is a spiral from the thread crests. Link to comment Share on other sites More sharing options...
Sir Nibble Posted April 25, 2018 Report Share Posted April 25, 2018 21 hours ago, Mike the Boilerman said: Possibly, but I cant see it matters much what you use the drill the hole for an 'easy-out' stud extractor. I think there is a better use for a LH twist drill, but I can't think of it! These things must be the most futile waste of space ever. In 45 years I have seen a broken stud shifted by one of these once and dozens broken off. Link to comment Share on other sites More sharing options...
Neil Smith Posted April 25, 2018 Report Share Posted April 25, 2018 20 minutes ago, Sir Nibble said: These things must be the most futile waste of space ever. In 45 years I have seen a broken stud shifted by one of these once and dozens broken off. Agreed, I bought a set from the snap on man when I worked in a garage 40 odd. Years ago and still u used to this day, they wasn't cheap either. Neil. Link to comment Share on other sites More sharing options...
MtB Posted April 25, 2018 Report Share Posted April 25, 2018 1 hour ago, Sir Nibble said: These things must be the most futile waste of space ever. In 45 years I have seen a broken stud shifted by one of these once and dozens broken off. I agree. I’ve only tried to use one once and the size necessary was so small compared to the broken stud I had no confidence to apply suffient force for fear it would snap off. I wasn’t recommending them. I guess I agree with Nick, it is the intended use for a left hand twist drill. Link to comment Share on other sites More sharing options...
Cheshire cat Posted April 25, 2018 Report Share Posted April 25, 2018 Moving this conversation on, has anyone got recommendations regarding drill bits. I had some really nice Bosch cobalt ones that lasted ages but I don't seem to be able to find good replacements. I did a bulk buy from ebay for unbranded generic metal drills and half of them had a tip that wasn't centered. Appalling rubbish. Link to comment Share on other sites More sharing options...
bizzard Posted April 25, 2018 Report Share Posted April 25, 2018 Dormer were at one time the drill bits to have, still are. Any ordinary good make of HSS bits are very good if used at the correct speed for its size and lubricant and will last well. Draper aren't bad. I've used the tapered flute type of uneasyout, a bit better than the spiral type but not much. Link to comment Share on other sites More sharing options...
dor Posted April 25, 2018 Report Share Posted April 25, 2018 I had a broken bolt on my bike once. The guy in the workshop drilled a hole in the broken stud, then rather than using a stud extractor, hammered in a Torx bit. Stud came out easily and the Torx bit was none the worse for the experience, although I expect they were better quality than the average bits on ebay. Link to comment Share on other sites More sharing options...
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