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Stanley
Local Historian & Old Fart


36804 Posts
Posted -  25/11/2004  :  14:20
I've always been fascinated by the things people do in their spare time when they can do exactly what they want to do. Men and sheds are a particularly fertile field. Women tend to do their thing in the comfort of the house.



I was delighted to see Andy's picture of the clock movement he has made.







It struck me that we could perhaps start a new topic devoted to spare time skill. So Andy starts it off and my contribution is this:







It's a small steam engine made from scratch and is based on the Stuart 5A but a longer stroke. One of these will drive a 14 foot boat with steam at 250psi. By the way, we don't like to call them models, it's exactly the same construction and materials as a full size engine, just smaller. So come on out there, let's hear about what you make in your spare time. I reckon we could be in for some surprises!


Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk
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Stanley
Local Historian & Old Fart


36804 Posts
Posted - 08/09/2007 : 11:51

 

 

 

 

 

 

 

 

 

 

 

 

All quite splendid....  I started marking the con rods out and then realised I had a major cock up....  I've milled the ends in the same plane instead of 90 degrees to each other......  Only one thing to do...  into the scrap bin and start again!  I think it must be old age......




Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
panbiker
Senior Member


2301 Posts
Posted - 08/09/2007 : 15:36

Puts my scrapped efforts at penny bashing into the shade Stanley, you must be gutted, bet you can turn them into something else in time though. I didn't think you had such a thing as "scrap" Pity no-one else "in the know" didn't see the mistake in the earlier pics.

The penny spit is nearly finished, need to solder the pin on the back then a buff and smooth. Need to get it finished for the Embsay and Bolton Abbey 40's do next weekend.



Edited by - panbiker on 08 September 2007 15:47:55


Ian Go to Top of Page
pluggy
Geek


1164 Posts
Posted - 08/09/2007 : 16:08
I'm sure I read that someone fixed a 2 throw crankshaft tuned in the same plane by warming it up and twisting it. Just do it on the con rods, we won't tell anyone......   



Need computer work ?
"http://www.stsr.co.uk"

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Stanley
Local Historian & Old Fart


36804 Posts
Posted - 08/09/2007 : 17:35
It's only a mistake.  I have taken the afternoon off and will make 4 more tomorrow.  I'm not 'gutted'.  I save that for important things.....  I've been thinking and the new ones will be different, heavier in the big end and saw cut instead of milled.


Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
panbiker
Senior Member


2301 Posts
Posted - 08/09/2007 : 18:24
Probably the wrong word Stanley, dissapointed would have been better. I bet the new ones will be "bob on" after your re-think.


Ian Go to Top of Page
Stanley
Local Historian & Old Fart


36804 Posts
Posted - 10/09/2007 : 07:32
The good news is I have enough 2" bar for the new ones, also, the old ones have the eccentric rods inside them so no waste.  Bad news is that I had demanding visitors all day and all I did was paint white marking paint on the stock bar!  You're right, I shall go a different route to muck-shifting and the new con rods will be better..... and faster.  (If I can get into the shed!)


Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
Stanley
Local Historian & Old Fart


36804 Posts
Posted - 10/09/2007 : 17:53

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A different strategy and much faster.  First cut the blanks to size, then turn the crank end and the rod down to 1 1/4".  I painted the ends up with marking ink but realised I didn't need to do any marking.  I turned a spacer up for the arbor on the H mill 3/4" thick and mounted two identical slitting saws with a 3/4" gap.  Out with one of me mounting blocks and line the first one up for centre and then cut all four on the same setting.  Heavy cut but no breakages.  Then shove them back into the lathe and run the parting tool in until the sawn bits were freed.  No problem with this because the rods are going to be turned down to 1/2" diameter anyway.  First job tomorrow will be to turn the fixture through 90 degrees and cut the crank end with the same saw setting, 3'4 inch.  It will be easy to line them up at right angles because of the ends I have already cut, they will register in the 'V' of the fixture and I can line them up by eye.  So, by dinnertime tomorrow I should have a set of blanks to go in the two jaw and centre for the taper turning of the rod itself. 




Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
panbiker
Senior Member


2301 Posts
Posted - 10/09/2007 : 18:38
Looks like a good plan Stanley, It seems to be a faster method than the way you did the first versions.


Ian Go to Top of Page
softsuvner
Regular Member


604 Posts
Posted - 11/09/2007 : 00:21

Stanley

Demanding visitors and a canine femme-fatale upsetting Jack, you are not having a happy time are you?

Granny would have sorted that, disconnect the door bell, and have a bucket of water handy (for the bitch)!

Malcolm!




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Stanley
Local Historian & Old Fart


36804 Posts
Posted - 11/09/2007 : 06:44
Ian, you're right, faster, more accurate and less muck.  Just goes to show that if I'd been a better fitter I'd have done them this way in the first place.  I also rethought the design of the marine end, I had it at 1/2" thick but as the journal is an inch wide I can comfortably get away with 3/4" which is the same set up for the crank end.  One trap I have identified is that the holes for the marine end bolts must be drilled while I can hold the blank dead accurate in the fixture, that is before I turn the tapered rod.  I'll have to make special bolts for them and now I have more thickness I can beef up these bolts.  The other big advantage of doing them this way is that you don't need any marking out, once the set-up is right, the measurements take care of themselves.  The order of play is saw the crank ends, drill the marine end bolt holes, split the marine end in the same fixture, all it needs rolling onto it's back and using the same set-up the 3/4 gap ensures I have an exact split of the end.  The idea is to do all this while I have the body parallel and big enough to hold.  Malcolm, the visitors were OK and I was able to give them good advice, I know this sounds pretentious but I feel I have a duty to pass on what I know if people ask for it.  I was privileged to be able to get it in the first place.  As for the bitch, a bucket of water wouldn't have helped.....  It was my fault, I took my eye of the ball.  On with the day....  walk Jack and attack the crank ends.  By the way, I've checked and a short piece of 3/8" bar in the well of the vee block is exactly right for packing the blank out parallel with the edges of the marine end registering on the 'V', so that means that my 90degree orientation of marine end to crank is automatic, once again no measuring or adjusting, it will set itself as you grip the piece. 


Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
softsuvner
Regular Member


604 Posts
Posted - 11/09/2007 : 17:21

Stanley

Glad everything is under control. Your "demanding" visitors, (has a"person from Porlock" ring to it that!), obviously had the good sense to consult someone who knows what he is talking about in the preservation world. Last Sunday I visited a site for the first time in nearly 20 years. On my previous visit, it seemed a hopeless case, a lot of people thought so, we were wrong. When the pictures have posted, I'll put some details on a steam engine thread. 

Haven't had any enthusiasm for my workshop recently, I've been involved in a frustrating battle with an insurance company incapable of taking a decision, or keeping their promises to do so. Nearly 4 months after my Norton got hit by a car, we were no further forward. In desperation, on the advice of the Financial Ombudsman Service, I wrote a carefully crafted, logical and factual letter of complaint (quoting the FOS). May be coincidence of course, but 2 days after I sent it, the problems seemed to have resolved themselves. Won't get compensated for the time and worry they have caused me though.

Now I can look to get back my enthusiasm for the bikes before the winter sets in. Just have to find my overalls, shouldn't be hard, just follow the smell of chain oil!

Malcolm




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Stanley
Local Historian & Old Fart


36804 Posts
Posted - 11/09/2007 : 17:50
I used to fry mine in tallow and graphite when they were new.....  Spent the morning in the shed cutting the crank ends, no problem.  After dinner I saat down to think out the precise design of the marine end and after working that out I went sleepy and after consulting with Jack went to bed for a couple of hours......  Retirement is wonderful.  Re. the insurance company Malcolm.  Send them a detailed invoice for the time and expense.  I did this with Barclays Bank once and they paid without a murmur......  Their problem is that if they get an invoice it has to go into the system and once in there it has to be dealt with, that's how their system works.  To do nothing is not in their aethos.


Stanley Challenger Graham




Barlick View
stanley at barnoldswick.freeserve.co.uk Go to Top of Page
Stanley
Local Historian & Old Fart


36804 Posts
Posted - 11/09/2007 : 18:08

 

 

 

 

 

 

 

 

 

 

 

 

I thought some of you might like a better view of the 'V' block fixture.  Bit big for my machines and not used very often but a bit of a gem won out of a skip years ago.  No name on it but I think they were made in various sizes. 

 

 

 

 

 

 

 

 

 

 

 

 

One of the reasons it doesn't often have an outing is the wide spacing of the fixing holes so a bit of an adjustment was needed to turn it through 90 degrees on the H mill table......

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Once that was done, cutting the crank ends was just routine......




Stanley Challenger Graham




Barlick View
stanley at barnoldswick.freeserve.co.uk Go to Top of Page
Stanley
Local Historian & Old Fart


36804 Posts
Posted - 12/09/2007 : 17:59

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First job was to drill all the bolt holes in the marine ends, not a lot of room to play with by the time the housing is bored for the split bush.  Then into the lathe using the four jaw and centre and part the crank cheeks off.  Then a bit of a think.....  I realised I had to split the marine ends while I still had the parallel shank to ensure the cut being square, so into the mill with a 1/16" slitting saw and off with their heads.  I didn't feel like getting into the lathe so I finished the afternoon off by milling the fixing holes in the 'V'block so that it fits the milling machines in any orientation.  Not a bad days work, a bit of cleaning up tomorrow, turn the rods to taper and then make eight fitted 2BA bolts for the marine ends.  Safter that I can start looking for the centres at each end, bore them out, shape the fork for the crosshead and make the split bushes for the big ends.  Amazing how much work there is in a con-rod!




Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
Stanley
Local Historian & Old Fart


36804 Posts
Posted - 13/09/2007 : 06:41
I was thinking about the next step and I think it will be easier to cut the slot in the fork before I turn the taper.  More to grab hold of and less chance of a slip-up!


Stanley Challenger Graham




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stanley at barnoldswick.freeserve.co.uk Go to Top of Page
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