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Post by catgate on Aug 22, 2005 19:30:21 GMT
I recently bought a Colchester Triumph from a dealer, who it turns out is untrustworthy and a liar, to put it mildly, and I now find that screw cutting is down the pan for the want of a half nut. The cost of a new one is well in excess of 250 olde Englyshe Poundes, but the person I spoke to at the 600 Group Spares Depot suggested one could well be obtained, at a much more sensible figure, from a lathe/machinery breaker. Do any of the wise heads on this forum know of such places. I am in the York area and have not found one round here yet. I do not suppose it matters where they are as long as they have a Post Office within spitting distance!
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Post by chris vine on Aug 22, 2005 23:03:25 GMT
Please tell us who the dealer is! without getting into trouble of course. maybe a few hints would be all we need......
Chris.
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Post by catgate on Aug 23, 2005 7:36:07 GMT
Well he does a bit on Ebay under the name of *ig*ang$$ (where *= a letter very early in the alphabet and $= numerals). The "recently" was three months ago and I still have not yet got the four jaw chuck that I was told was with the machine. In addition the coolant pump is burnt out. Bad deal....but a very plausable young man on the phone.
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Post by alanstepney on Aug 23, 2005 9:18:08 GMT
As an alternative, think about making the half nut. Not as difficult as it sounds.
OK, before anyone mentions it, I realise you would need to make it on another lathe.
There is a scrap yard near me that often has bits of machinery in. During this week I will take a look and see if they have anything interesting in stock.
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Post by catgate on Aug 23, 2005 16:54:05 GMT
Yes, Alan, I had thought about that. I had also thought about repairing it, although the whole device is in cast. The nut is in fact only half a nut, which comes down onto the lead screw from above. It is carried on a shaft, which is part of the casting, and which protrudes upwards into the back wall of the apron gearbox.This shaft transmits the longitudinal motion to the apron/saddle. It's up and down motion is controlled by a disk, which has machined into it a cam groove, and which itself is carried on a horizontal through shaft terminating with an operating lever on the front of the apron. There is a peg protruding from the back face of the nut body which runs in the above groove.
(It's true...a picture is worth a hundred words, but I do not know how to post on on this forum)
The damage consists of the nut shaft being broken at the point where it enters the hole at the bottom of the rear face of the apron. All the indications are that someone was turning (well tearing off big slivers of ) nylon, moving toward the tail stock, when one great big piece entered the back of the apron and got chewed up within. During this process it seems to have facilitated the releasing of the interlock and allowed the half not to drop, with disastrous consequences. The piece of nylon I pulled out was about 20mm wide, 2mm thick and 400mm long (and very badly "crimped" in places!) The force of this event almost ripped out the circlip which retains the leadscrew in its rightful position. It was only in for about a third of its diameter, but happily there seems to be no damage to the groove.
My thoughts on repair were :- Clean up the break and silver solder the bits back together, reduce the diameter slightly (also effectively "truing them up") and then shrink a steel sleeve over them, before also silver soldering this to the to of the nut. Then ream out the vertical hole in the
back of the apron.
The snag here is if I take this avenue before exhausting the possibility of a proper replacement on I finish up with a none standard hole if my repair fails.
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Post by the_viffer on Aug 23, 2005 21:44:35 GMT
Please tell us who the dealer is! without getting into trouble of course. maybe a few hints would be all we need...... Chris. Why a few hints? All or nothing. Either we can work out who it is or we can not. If relevant Joe Public can, saying that Tony B Liar is staying in Rock Ricards' mansion (were it untrue!) is not going to save the person making the statement. Conversely it is a complete defence to a libel action to show that what you say is true. The danger is that AigAang12 who is even more honest them I am (if that is possible) thinks the statement applies to him. As do others. It doesn't but where is your libel defence then? There are quite a lot of ?ig ?ang** registered on ebay. I would be cross if that were my registered name and I'd not sold you a pile of junk. |
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Post by catgate on Aug 24, 2005 10:40:54 GMT
Well....Ever since the day after this lathe was delivered I have been getting promises that the four jaw chuck, which was included in the sale, would be sent to me. Since sending photographs of the damage to the screw cutting I got a prornise that replacement parts would be supplied. To date there has been no indication whatsoever that these things will come to pass.
So...The day I posted this topic I also sent a "recorded delivery" letter to the person involved, telling him that unless, by the end of August, I had tangible evidence that he was going to honour his commitment, then I would commence procedings against him. Under these circumstances I feel bound not to disclose his name or his address. I felt that what I had disclosed was sufficient for now.
Who knows what September 1st might bring?
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Post by the_viffer on Aug 24, 2005 16:19:11 GMT
Sure if does not put it right then sue him. (And tell us who you have sued!)
I have threatened to do so to various people on a good few occasions and carried out the threat several times. I will not hesitate to do so in the future.
The County Court is intended for just this kind of thing. You can do it on-line these days (www.court-service.gov.uk). It is not formal or scary. If it go est it sup then you only lose the court fee which is low. You can't get costs awarded in a Small Claim except under unusual circumstances so you won't get to pay the other sides fancy barrister. Barristers are frowned on in these kind of fights. The District Judge will certainly watch out for your corner if the other side bring fancy lawyers in
My point was that by posting the hints of names in the way you did you might upset some honest and genuine ebay traders with similiar names to what you disclosed.
Good luck
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Post by 3405jimmy on Aug 25, 2005 18:19:03 GMT
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Post by steammadman on Aug 25, 2005 21:46:26 GMT
You say you are near YORK ,well, why dont you pay York model engineers a visit on their
club night. I'm not far from York and i know almost all of the members are VERY helpful guys
you may be using that lathe before you know it.
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Post by catgate on Aug 26, 2005 8:52:08 GMT
Thanks for your help, J im. Sadly, although they have one of the parts I require in stock, the cost is enormous. In fact before giving me the price, the person I spoke to suggested I try to get a secondhand part, and gave me the 'phone number of a chap in Herts. (who did not have one).
Thanks also to you, steammadman. I have in the past visited the YME club and found them to be a very nice bunch of real human beings. Oddly enough I may have found the solution very near to home. In a village near by is an engineering shop, and I call in the other day to see the chap who runs it to ask him the price of making a new one (having concluded that my little Atlas was not man enough for the job). He thought he could mend it by drilling and pressing in an inner stem , and then welding and truing the joint. It's worth a try. So he now has the job in hand (well at least on bench).
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Post by catgate on Sept 15, 2005 16:58:56 GMT
 Just testing! |
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