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Post by Roger on Apr 17, 2014 22:54:14 GMT
hi pete, yes, as Ed has said you need to bring everything up to heat (generally) to avoid localised stressing of joints. this is par for the course with propane, but somewhat problematic i understand with oxy-acetylene. hi paul, i was a bit p-ssed off that all my data sheets got incinerated this afternoon! i should have put them somewhere safe! all my enlarged zeuss tables plus tapping sizes for all types of threads went up in flames! the sense of achievement doesnt really arise till all is finished and you pump the damn thing up with the gauge attached! till then it is a state of nervous apprehension and worry - but probably not so bad as pete will feel when he machines up his expensive cylinder castings! for us amateurs i think that sense of nervous apprehension is what gets the adrenalin flowing and makes us want to do these daft things instead of playing golf or watching the TV! cheers, julian How annoying, I've always thought of written documents as being far safer than computer files but I've changed my mind. Now that we've got Dropbox and the like, I don't have anything in hard copy, it's just spread around the ether and on all the computers we've got. I use the computer in the workshop for all that stuff, but years ago I made a block that has all the Taps from M3 to M12 with their corresponding tapping and clearance size standing in neat rows of holes. It's saved countless hours over the years and saves you having to look up a size and then find the drill. At a push, it might even work with imperial sizes too ;-) I think everyone is nervous when tackling a high tariff job, that's even more stressful with CNC. As for Golf, I can't recommend it highly enough, just don't take it up unless you can deal with disappointment on a monumental scale. |
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Post by GWR 101 on Apr 17, 2014 22:54:30 GMT
Hi Julian, yes I understand what you mean but there must also be a sense of achievement at every stage along the way. And isn't Alan's kind offer also what its about, passing on advice and helping out. Paul
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jma1009
Elder Statesman
Posts: 5,922
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Post by jma1009 on Apr 17, 2014 23:01:22 GMT
hi alan,
that's very kind of you but i really ought to either copy again my original zeuss book (it has all my penned additions on them) or write them out properly. of more concern is my tubal cain tapping sizes - most of which had my own sizes i'd arrived at over 30 years added as tubal cain specified horrendously over sized tapping holes for my liking. quite a few i have special D bits i can measure up for unions etc but not all. had the whole lot not gone up in flames i might not have missed that corner of the foundation ring at a critical moment!
also burnt a big hole in an old workshop overcoat covering up the mill! as mice had eaten bits of it the loss of the overcoat isnt a problem!
all fun and games!
cheers,
julian
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Post by Roger on Apr 17, 2014 23:02:16 GMT
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jma1009
Elder Statesman
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Post by jma1009 on Apr 17, 2014 23:09:09 GMT
i had added on the first 2 pages of my zeuss tables all the number drills between the fraction and imperial sizes on A4 sheets. it wont take long to re-do them properly as ive my original book plus another. i did a table a few years ago for the smaller sizes of both imperial metric and number drills for injector cones and really ought to do something similar for the whole 0-1" range. but thanks roger and alan for your help! the tapping sizes loss however is annoying as arrived at over many many years and differs quite considerably from 'as published'. my own fault for waving the torch about carelessly!
cheers,
julian
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Post by Jim on Apr 17, 2014 23:14:39 GMT
hi pete, yes, as Ed has said you need to bring everything up to heat (generally) to avoid localised stressing of joints. this is par for the course with propane, but somewhat problematic i understand with oxy-acetylene. I couldn't agree more Julian, I bring everything up to heat using the big Sievert propane torch before going anywhere near boiler with the oxy-acetylene. That's just used in the latter stages where you have a very big mass of copper and need to bring the temp up the next small step to where the silver flows through the joint. At that point I'm very careful to keep the torch moving all the time and the bright blue tip away from the copper, a melting moment is the last thing one needs. As for approaching the boiler with nervous apprehension, I'm still nervously apprehending mine along with the cost of getting some more gas.  Jim |
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Post by Deleted on Apr 18, 2014 14:33:00 GMT
Be careful young JULIAN as 'er indoors might think you're getting frisky (again) !!-------All very well etc. but it does use up valuable workshop time !!  ------------- ROGER, those tables are missing one, vital element viz.}--------- a well thumbed, greasy top corner...!! |
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Post by Roger on Apr 18, 2014 17:57:30 GMT
Be careful young JULIAN as 'er indoors might think you're getting frisky (again) !!-------All very well etc. but it does use up valuable workshop time !! ------------- ROGER, those tables are missing one, vital element viz.}--------- a well thumbed, greasy top corner...!! I'll have to fire up Photoshop and add that in.... |
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Post by ejparrott on Apr 19, 2014 8:08:15 GMT
hi pete, yes, as Ed has said you need to bring everything up to heat (generally) to avoid localised stressing of joints. this is par for the course with propane, but somewhat problematic i understand with oxy-acetylene. I couldn't agree more Julian, I bring everything up to heat using the big Sievert propane torch before going anywhere near boiler with the oxy-acetylene. That's just used in the latter stages where you have a very big mass of copper and need to bring the temp up the next small step to where the silver flows through the joint. At that point I'm very careful to keep the torch moving all the time and the bright blue tip away from the copper, a melting moment is the last thing one needs. As for approaching the boiler with nervous apprehension, I'm still nervously apprehending mine along with the cost of getting some more gas. Jim I have heard of people using oxy exclusively but I don't, I don't see how you can. Propane for general heat, oxy for local, although it does make it a 2 man job - or in my case one man one woman! |
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jma1009
Elder Statesman
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Post by jma1009 on Apr 19, 2014 12:11:49 GMT
ive just drilled the inner wrapper for the side stays through from the outer wrapper (already drilled and deburred before fitting the inner firebox)
and deburred using the round nosed tool in the pic on 11th march, held in the hand held electric drill. 48 holes deburred in a matter of a few minutes compared with over 3 hours each side on the previous boiler, so can thoroughly recommend this method. all drilled 3mm at this stage and they will get opened out to 1/8" dia just before silver soldering the side stays in so the holes are clean.
cheers,
julian
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Post by Deleted on Apr 19, 2014 15:53:51 GMT
"I have heard of people using oxy exclusively but I don't, I don't see how you can. Propane for general heat, oxy for local, although it does make it a 2 man job - or in my case one man one woman!"---------- JULIAN, are you developing our late friend CURLY's persuasion re}---Enjoying Ladies footwear ??  - |
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jma1009
Elder Statesman
Posts: 5,922
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Post by jma1009 on Apr 19, 2014 21:04:48 GMT
alan,
dont tempt me!
you are quoting Ed, and im sure Holly wont be very pleased if Ed borrows her shoes!!
incidentally had a fun afternoon in the garden testing the gordon smith squat safety valve i'd made for STEPNEY on the dome of one of my GWR locos instead of the filler plug. must say the gordon smith safety valve was quite superb. club steam up tomorrow and monday so all ready.
cheers,
julian
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Post by Deleted on Apr 19, 2014 21:17:51 GMT
To-day Joyce and I were selling at our local Car Boot sale ( 06.30Hrs actually "on pitch" )..... I plan to ride my BSA WD 350 over to Kinver tomorrow to lend a hand in the general running etc..then home in time to watch the F1 Spanish GP....Monday will see me down Worcester way early morning to attend the RED MARLEY HILL CLIMB ( these days as a spectator only !!)>>>>>>>> redmarleyhillclimb.com/Home.html ----------------------- This "retired" thing is more hard work than they let on you know !!!----- |
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jma1009
Elder Statesman
Posts: 5,922
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Post by jma1009 on Apr 19, 2014 21:58:45 GMT
hi alan,
be careful!
the worst fatality rate for all UK road users is 'old bikers' apparently!
cheers,
julian
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Post by Deleted on Apr 20, 2014 0:14:32 GMT
"I have heard of people using oxy exclusively but I don't, I don't see how you can. Propane for general heat, oxy for local, although it does make it a 2 man job - or in my case one man one woman!"---------- JULIAN, are you developing our late friend CURLY's persuasion re}---Enjoying Ladies footwear ?? - Hmmm. that looks remarkably like a photo I posted on another forum abut a year ago that I scanned from an old copy of ME |
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Post by Shawki Shlemon on Apr 20, 2014 10:11:34 GMT
"I have heard of people using oxy exclusively but I don't, I don't see how you can. Propane for general heat, oxy for local, although it does make it a 2 man job - or in my case one man one woman!"---------- JULIAN, are you developing our late friend CURLY's persuasion re}---Enjoying Ladies footwear ?? - Actually , it's the best way , I built a number of boilers using only oxy , I used heating tip with 8 holes in it , heat the boiler all over and then do the step , for stays I used tip no 30 and for joints and foundation I used the heating tip , one has to be careful not to over heat . I have also built boilers using only gas ( smaller ones ) . |
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Post by Jim on Apr 20, 2014 12:48:34 GMT
I'm fairly sure Barry only uses oxy too Shawki. Like much in this hobby, we develop individual techniques that work for us but not for others. Some use propane only others a combination of propane to heat and oxy to flow and yet others only Oxy. It's the many ways of doing things that makes the hobby so interesting and accessible to so many people.
Jim
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Post by Deleted on Apr 20, 2014 18:30:48 GMT
And in common with Classic Bikes/Cars it's also a great way of haemorrhaging cash from your Bank account !!  |
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Post by Deleted on Apr 20, 2014 18:56:22 GMT
And in common with Classic Bikes/Cars it's also a great way of haemorrhaging cash from your Bank account !! Oh how I agree with that statement Alan.....  when health stopped me working over 2 years ago I had to decide between finishing my classic Porsche engine or get back to 4472. Since the loco was a cheaper option I chose the train, I'm hoping that things will improve and that one day I'll be able to earn a crust to play with the car again ... I had completed the short block, added a number of design changes with a vast £4500 spent on that alone. I truly hope that one day I'll be able to get the old girl back on the road,, well I call her old and she is at 28 years but she'll still show a clean pair of heels to most modern cars including 90% of the current Porsche range.... that's what mods can do for yeh... Pete |
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jma1009
Elder Statesman
Posts: 5,922
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Post by jma1009 on Apr 23, 2014 20:43:42 GMT
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when health stopped me working over 2 years ago I had to decide between finishing my classic Porsche engine or get back to 4472. Since the loco was a cheaper option I chose the train, I'm hoping that things will improve and that one day I'll be able to earn a crust to play with the car again ... I had completed the short block, added a number of design changes with a vast £4500 spent on that alone. I truly hope that one day I'll be able to get the old girl back on the road,, well I call her old and she is at 28 years but she'll still show a clean pair of heels to most modern cars including 90% of the current Porsche range.... that's what mods can do for yeh...