RMweb Gold Tony_S Posted November 21, 2021 RMweb Gold Share Posted November 21, 2021 I generally try to be kind but I can’t be too concerned for the need to search for assorted criminals remains. Plenty of murderers have refused to confess to the location of their innocent victims. Those families I can have sympathy for. 14 Link to post Share on other sites More sharing options...
RMweb Premium jamie92208 Posted November 21, 2021 RMweb Premium Share Posted November 21, 2021 1 hour ago, PhilJ W said: Now they need to look for Ginger Marks. But that will mean digging up the M1 between Daventry and Corby, (junctions 18 and 19 which was under construction at the time). Is Lord Lucan there as well. Jamie 1 9 Link to post Share on other sites More sharing options...
AndyID Posted November 21, 2021 Share Posted November 21, 2021 6 hours ago, Florence Locomotive Works said: Re Andy’s lathes and Sherlines/Taigs: Dad is somewhat opposed to the idea of a lathe (not sure why he has more uses for it than me almost) and any purchase by me over $700 is strictly banned by higher powers, unless it’s a piece of tech. I will discuss the matter with him. Hi Douglas, I believe Toyo lathe was acquired by Proxxon who, I think, still make a derivative of the same lathe. Some of the Proxxon attachments might work on the Toyo but I really don't know for sure. My Toyo is really only suitable for small parts. For more general work you'd want something with a 9" throw. A used South Bend 9" might be a good fit if you can find one in good shape (no wear on the ways). All sorts of spares and attachments show up on Ebay. My SB-9 cost me $60 about forty years ago only because the junkyard guy had no idea what it was and I had no idea either Andy 10 1 Link to post Share on other sites More sharing options...
RMweb Premium Dave Hunt Posted November 21, 2021 RMweb Premium Share Posted November 21, 2021 7 minutes ago, jamie92208 said: Is Lord Lucan there as well. Jamie Not forgetting Shergar.......... Dave 8 2 Link to post Share on other sites More sharing options...
AndyID Posted November 21, 2021 Share Posted November 21, 2021 1 hour ago, simontaylor484 said: I thought he was meant to be under a sports field allegedly I can't remember if it was baseball or American football Giants Stadium in NJ. When I lived in NJ I did take a scout around but I couldn't see any sign of him. Hoffa burial locations are a bit like "Shakespeare Slept Here". 3 8 Link to post Share on other sites More sharing options...
RMweb Gold Happy Hippo Posted November 21, 2021 Author RMweb Gold Share Posted November 21, 2021 1 hour ago, jamie92208 said: Is Lord Lucan there as well. Jamie I doubt it, I have it on good authority that he was last seen out riding Shergar. 1 11 Link to post Share on other sites More sharing options...
AndyID Posted November 22, 2021 Share Posted November 22, 2021 On 19/11/2021 at 17:29, AndyID said: Oi makes me own I made a 17 tooth gear that replaces the 18 tooth gear in a 18/54 compound gear on ye olde South Bend so that I can cut metric and Imperial threads. Actually there is a very small error which would only be detectable on a very long screw. The lathe's leadscrew is 8 TPI. Those who enjoy arithmetic puzzles can calculate the error (I do have a spreadsheet somewhere.) It's possible to make the very small BA size screws this way but only if they are rather short. Nuts could only be made by using the lathe to cut a tap in tool steel. I have to say I'm rather disappointed that nobody has so far has responded to my challenge . So that you can again get some beauty sleep, here's the answer: The leadscrew pitch is 0.125" (8 TPI) An inch is 25.4 mm so the leadscrew pitch in mm is 3.175 mm 54/17 = 3.176470588 (close enough to 3.1765) So the error is less than 0.047% Inserting the 17/54 compound gear into the gear train effectively converts the 1/8" pitch into something extremely close to one millimeter pitch. Of course it would make things a lot simpler if one inch was 25 mm (24 would have been even better) but it's a bit late for that 6 2 Link to post Share on other sites More sharing options...
pH Posted November 22, 2021 Share Posted November 22, 2021 30 minutes ago, AndyID said: Of course it would make things a lot simpler if one inch was 25 mm (24 would have been even better) but it's a bit late for that The inch was there before the mm, so for the inch to be 25 (or 24) mm, the mm would have to have had a different value. And for that to happen, the Earth would have had to have been a different size. (I hope I got the ‘haves’ and ‘hads’ right.) 7 4 Link to post Share on other sites More sharing options...
AndyID Posted November 22, 2021 Share Posted November 22, 2021 11 minutes ago, pH said: The inch was there before the mm, so for the inch to be 25 (or 24) mm, the mm would have to have had a different value. And for that to happen, the Earth would have had to have been a different size. (I hope I got the ‘haves’ and ‘hads’ right.) Oddly enough British Association (BA) threads, which have been around for yonks, are metric but they are pretty much incompatible with Metric threads . Shame really because the BA system is very well designed. The US and Metric systems are a bit of a hodge-podge (IMHO). 4 5 Link to post Share on other sites More sharing options...
Florence Locomotive Works Posted November 22, 2021 Share Posted November 22, 2021 18 minutes ago, AndyID said: Oddly enough British Association (BA) threads, which have been around for yonks, are metric but they are pretty much incompatible with Metric threads Not if you try hard enough 2 1 1 15 Link to post Share on other sites More sharing options...
SM42 Posted November 22, 2021 Share Posted November 22, 2021 1 hour ago, AndyID said: I have to say I'm rather disappointed that nobody has so far has responded to my challenge . So that you can again get some beauty sleep, here's the answer: The leadscrew pitch is 0.125" (8 TPI) An inch is 25.4 mm so the leadscrew pitch in mm is 3.175 mm 54/17 = 3.176470588 (close enough to 3.1765) So the error is less than 0.047% Inserting the 17/54 compound gear into the gear train effectively converts the 1/8" pitch into something extremely close to one millimeter pitch. Of course it would make things a lot simpler if one inch was 25 mm (24 would have been even better) but it's a bit late for that My head hurts Andy 3 9 1 Link to post Share on other sites More sharing options...
AndyID Posted November 22, 2021 Share Posted November 22, 2021 5 minutes ago, SM42 said: My head hurts Andy It's not that bad really and I'll be happy to talk you through the steps. Then you'll say "Is that all it is!" Come to think of it, it might make a good teaching example or an exam question. 9 1 Link to post Share on other sites More sharing options...
RMweb Premium polybear Posted November 22, 2021 RMweb Premium Share Posted November 22, 2021 9 hours ago, Tony_S said: I generally try to be kind but I can’t be too concerned for the need to search for assorted criminals remains. Agreed - why waste scarce funds diggin' em up, just so they get buried again? And as for whoever put them there in the first place, well as far as this Bear is concerned (and assuming the "victim" was a real bad 'un) they've done us a favour where the Court system failed. Yours, Subversive Bear 3 5 Link to post Share on other sites More sharing options...
AndyID Posted November 22, 2021 Share Posted November 22, 2021 6 minutes ago, polybear said: Agreed - why waste scarce funds diggin' em up, just so they get buried again? And as for whoever put them there in the first place, well as far as this Bear is concerned (and assuming the "victim" was a real bad 'un) they've done us a favour where the Court system failed. Yours, Subversive Bear Yup. An exercise in total futility. In the highly unlikely event that forensic evidence actually fingered a suspect it's much more likely that said suspect croaked about twenty years ago. 1 8 Link to post Share on other sites More sharing options...
Winslow Boy Posted November 22, 2021 Share Posted November 22, 2021 4 hours ago, Florence Locomotive Works said: Not if you try hard enough I take it that's with a hammer is it Douglas. 1 10 Link to post Share on other sites More sharing options...
RMweb Premium PhilJ W Posted November 22, 2021 RMweb Premium Share Posted November 22, 2021 2 hours ago, polybear said: Agreed - why waste scarce funds diggin' em up, just so they get buried again? And as for whoever put them there in the first place, well as far as this Bear is concerned (and assuming the "victim" was a real bad 'un) they've done us a favour where the Court system failed. Yours, Subversive Bear Wasn't it the Kray's that were responsible? 3 Link to post Share on other sites More sharing options...
RMweb Premium PhilJ W Posted November 22, 2021 RMweb Premium Share Posted November 22, 2021 5 hours ago, AndyID said: Oddly enough British Association (BA) threads, which have been around for yonks, are metric but they are pretty much incompatible with Metric threads . Shame really because the BA system is very well designed. The US and Metric systems are a bit of a hodge-podge (IMHO). 4 hours ago, Florence Locomotive Works said: Not if you try hard enough Nothing to it, all you need is some valve seating compound and a bigger spanner. 1 3 1 4 Link to post Share on other sites More sharing options...
RMweb Gold Tony_S Posted November 22, 2021 RMweb Gold Share Posted November 22, 2021 6 hours ago, Florence Locomotive Works said: Not if you try hard enough If I bodge or force anything (or worse, misuse a tool) I still get guilty feelings. Dad worked for many years in a business that made screws, bolts, rivets, studs, basically any fastener other than nuts. He knew everything about threads. I had a job where he worked one summer. I even counted rivets for a while (I had to stop every twenty rivets to check they were to gauge). None of the threaded products there were cut, they were rolled. Tony 10 Link to post Share on other sites More sharing options...
RMweb Premium Compound2632 Posted November 22, 2021 RMweb Premium Share Posted November 22, 2021 Once you've memorised the definition: 1 inch = 25.4 mm you're away. Though for modelling at 4 mm/ft scale, it's handy to remember that 3 inch = 1 mm = 0.040" (40 thou) or near enough in the latter case. 5 5 Link to post Share on other sites More sharing options...
RMweb Gold Happy Hippo Posted November 22, 2021 Author RMweb Gold Share Posted November 22, 2021 9 hours ago, AndyID said: I have to say I'm rather disappointed that nobody has so far has responded to my challenge . So that you can again get some beauty sleep, here's the answer: The leadscrew pitch is 0.125" (8 TPI) An inch is 25.4 mm so the leadscrew pitch in mm is 3.175 mm 54/17 = 3.176470588 (close enough to 3.1765) So the error is less than 0.047% Inserting the 17/54 compound gear into the gear train effectively converts the 1/8" pitch into something extremely close to one millimeter pitch. Of course it would make things a lot simpler if one inch was 25 mm (24 would have been even better) but it's a bit late for that That's exactly how I worked it out as well....... 2 1 1 6 Link to post Share on other sites More sharing options...
RMweb Gold Popular Post Happy Hippo Posted November 22, 2021 Author RMweb Gold Popular Post Share Posted November 22, 2021 (edited) As promised, little bit more signal action: The disc which is more in focus this time! I'm awaiting the 3D printed lamp cases from Modelu, so this evening I'll concentrate on drilling out the pivots for the balance weight and replace them with brass tube. The tube will be split into two parts and will be pushed through the casting from each side to leave a gap which is just large enough for the etched balance weight to slide through. This should stop it flapping around too much. The operating rod shewn fitted to the disc is 0.3mm brass rod, the untrilled pivot bar for the balance weight in 1.00mm dia, these give some idea of the overall size: Whilst I've been sorting through my signalling bits, I found enough parts to start on a GWR lower quadrant home signal: I am a follower of the Jon Fitness school of signal building, so the 1.00 mm dia axle for the signal arm is replaced with a 14 BA cheese head screw. This is soldered into the lens and arm assembly, and can be tightened up to hold the arm in position for setting it up. another JF system I've followed is another rod soldered (0.8 mm) in place, that prevents the arm from going beyond the horizontal. It provides a physical stop against the main signal post. The enlargement of the picture is rather cruel on my soldering abilities. Edited November 22, 2021 by Happy Hippo 12 6 2 Link to post Share on other sites More sharing options...
Canal Digger Posted November 22, 2021 Share Posted November 22, 2021 11 hours ago, AndyID said: On 20/11/2021 at 01:29, AndyID said: Oi makes me own I made a 17 tooth gear that replaces the 18 tooth gear in a 18/54 compound gear on ye olde South Bend so that I can cut metric and Imperial threads. Actually there is a very small error which would only be detectable on a very long screw. The lathe's leadscrew is 8 TPI. Those who enjoy arithmetic puzzles can calculate the error (I do have a spreadsheet somewhere.) It's possible to make the very small BA size screws this way but only if they are rather short. Nuts could only be made by using the lathe to cut a tap in tool steel. Expand I have to say I'm rather disappointed that nobody has so far has responded to my challenge . So that you can again get some beauty sleep, here's the answer: The leadscrew pitch is 0.125" (8 TPI) An inch is 25.4 mm so the leadscrew pitch in mm is 3.175 mm 54/17 = 3.176470588 (close enough to 3.1765) So the error is less than 0.047% Inserting the 17/54 compound gear into the gear train effectively converts the 1/8" pitch into something extremely close to one millimeter pitch. Of course it would make things a lot simpler if one inch was 25 mm (24 would have been even better) but it's a bit late for that Reminds me of my first job after leaving school, setting up Coil Winding machines in a transformer factory. Measure the thickness of the wire with a microammeter and look up the required combination of gears so that the arm feeding the wire onto the former, tracked back and forth correctly. 4 5 Link to post Share on other sites More sharing options...
RMweb Premium New Haven Neil Posted November 22, 2021 RMweb Premium Share Posted November 22, 2021 Just plonked in place for now, have to sort the backscene first before any other work, but....I am MIGHTY pleased with this, thanks to Stubby47. 11 6 Link to post Share on other sites More sharing options...
Florence Locomotive Works Posted November 22, 2021 Share Posted November 22, 2021 (edited) Afternoon all, Thanksgiving break begins Wednesday so it’s a short week for me. Most of our classes are doing nowt so I spent most of the afternoon reading about the ill fated Franklin Expedition to the Arctic during the 1840s. Very interesting. On a different note it has been commanded that I cook black pudding hash Wednesday night, without the black pudding. I will try to not make a hash of this. Douglas Edited November 22, 2021 by Florence Locomotive Works 1 3 8 Link to post Share on other sites More sharing options...
RMweb Gold Tony_S Posted November 22, 2021 RMweb Gold Share Posted November 22, 2021 12 minutes ago, Florence Locomotive Works said: without the black pudding. I sympathise. Every week Aditi asks if I would like anything to be added to the shopping order, I reply “black pudding please.” She just informs me she assumes I am joking and doesn’t order it. I have a cunning plan, I have an introductory offer for another online supplier of food items. They do black puddings (and white pudding) so I could make a minimum order of £40 for such products. There might not be enough space in the freezer though! 12 1 Link to post Share on other sites More sharing options...
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