harveyb258 Posted March 1, 2018 Share Posted March 1, 2018 As always, excellent craftsmanship!! The wheels look superb already and will look stunning when finished! RE the beads, I wouldn't know where to begin to do them on a mill or lathe. I would have to cut the rings from a suitable thickness aluminium or brass, then file and sand to shape. It may not be the easiest way to do it, but it's all part of the fun of scratchwork! Cheers, H Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 2, 2018 Author Share Posted March 2, 2018 Thanks Harvey, I think you are right, I need to get hold of some thick wall tubing and then turn it on the lathe. Graham 1 Link to comment Share on other sites More sharing options...
harveyb258 Posted March 2, 2018 Share Posted March 2, 2018 What is the O/D (outside diameter) of the beads? I bet you could find a metal tube of suitable dia. somewhere online....all you'd have to do is cut the internal quadrant and slice to thickness. Looking forward to your progress Graham. Cheers, H Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 3, 2018 Author Share Posted March 3, 2018 H Yes thats my thoughts only problem is the outside dia is 82mm and inside 73.2mm. So far I have not found any tube that fits the bill but I could do it from a solid bar and make a lot of swarf! Graham 1 Link to comment Share on other sites More sharing options...
harveyb258 Posted March 4, 2018 Share Posted March 4, 2018 Hi Graham, Have just gone back and re-read your wip regarding the leaf-springs. I didn't pick up on it until now, but the reason you had breakage/failure is that you quenched in water. Steel contains oils that burn off in the heat-treat process, so in order for your spring to be hard, yet remain springy you need to quench in oil. I know it's a bit late now, but at least you know for future reference. Cheers, H Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 4, 2018 Author Share Posted March 4, 2018 Hi H You are right I did quench in water, but I wanted to see how hard they were before I annealed the springs. The answer was incredibly hard/brittle and in fact the one I tried snapped as I tried to bend it. Once annealed they were ok ie they do now spring but still too stiff for a model car. From what I have read you can quench in oil or water, water giving a harder result. The trick then is the proper annealing to bring it to the desired result. Next time I shall try oil. Thanks Graham 1 Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 7, 2018 Author Share Posted March 7, 2018 (edited) A few more shots of the wheels. Starting to shape the spokes. Rear and Front Wheel. The nuts on the rear came with the Pocher kit, the others are 12BA I now just have to find some suitable material/tube from which to make the beads. Edited March 7, 2018 by Engineering Modeller 5 Link to comment Share on other sites More sharing options...
harveyb258 Posted March 7, 2018 Share Posted March 7, 2018 Only got 3 words G....DOG'S man-vegetables MATE!!!!! Cheers, H Link to comment Share on other sites More sharing options...
Codger Posted March 7, 2018 Share Posted March 7, 2018 Bravo - stunning. Link to comment Share on other sites More sharing options...
Dr. Fiat Posted March 8, 2018 Share Posted March 8, 2018 Gosh those wheels look incredible!!! Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 8, 2018 Author Share Posted March 8, 2018 Thanks guys, I appreciate the comments. This is probably going to be my last post for a short while as I have a couple of other projects that I need to progress. In the mean time I have uploaded all the photos to a website that I run. It includes a lot of images that I have collected from the Net of real cars which maybe useful to others building the Fiat. You can see them here Graham 2 Link to comment Share on other sites More sharing options...
sharknose156 Posted March 8, 2018 Share Posted March 8, 2018 GREAT ACHIEVEMENT GRAHAM thank you for the link to the website, beautiful pictures and tutorial how did you manage the chains ? delivered in the Pocher box ? this is 1/12 right ? cheers Sam Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 8, 2018 Author Share Posted March 8, 2018 Hi Sam The model is based on the Pocher kit at 1/8 scale. I had originally just thought I would try and make just the chassis out of brass but the more I have done the more I think I shall do a scratch build of the whole thing. I am using the Pocher brass parts where possible and the chains are Pocher. They are a bit fiddly to make but not too bad. Graham 1 Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 26, 2018 Author Share Posted March 26, 2018 I found some brass that is a suitable size to make the beads! One bit had a hole in it but by cutting a groove in the face I managed to make the inside dia of the bead. Parting off a bead This is the form tool I used for shaping the profile of the bead. Next job was to make the bead clamps. For this I used some 6mmx0.58mm brass strip and I made a former from guage plate. The gauge plate was hardend by heating to cherry red and plunging into water. The former. Ready to file one end Then the other end To bend the clamp I first annealed the brass by heating to dull red and plunging into water this results in a nice soft brass that can be bent. I used the engineering clamp to do the final bend to the shape of the bead. Fitted with the Pocher rubber. Just 3 more to do. 7 Link to comment Share on other sites More sharing options...
Nigel Heath Posted March 27, 2018 Share Posted March 27, 2018 To use a well over used appellation but totally appropriate in this context - absolutely awesome work! Link to comment Share on other sites More sharing options...
PROPELLER Posted March 27, 2018 Share Posted March 27, 2018 A fine and smart solution! Congrats! On a Pratt Burnerd chuck... What is behind? What is the make of the lathe? Dan. Link to comment Share on other sites More sharing options...
PC2012 Posted March 27, 2018 Share Posted March 27, 2018 It's alright I suppose......😢😭😟 1 Link to comment Share on other sites More sharing options...
harveyb258 Posted March 27, 2018 Share Posted March 27, 2018 WOWW!!!!!!! Stunning job Graham! Cheers, H Link to comment Share on other sites More sharing options...
Engineering Modeller Posted March 27, 2018 Author Share Posted March 27, 2018 Thanks guys I appreciate all the comments! The lathe is a Colchester Harrison that I bought a good few years ago. The four jaw chuck is the Pratt Burnerd and is really nice, the 3 jaw is a TOS and is also pretty good. The question regarding what is behind, if you are referring to the black stuff its actually a piece of plastic damp proof course. It catches most of the swarf and is then easy to clean with a vacuum cleaner. I first tried this when I was machining some cast iron locomotive wheels and it worked great, cast iron swarf is a real bugger and when mixed with oil forms an abrasive that you want to keep off the lathe. Today I finished off the clamps for the other three wheels and fitted the tyres. This is how far I have got, still loads to do but it's taking shape. 4 Link to comment Share on other sites More sharing options...
Roy vd M. Posted March 27, 2018 Share Posted March 27, 2018 Extraordinary work, really. This is going to be a gem inside any display cabinet. Link to comment Share on other sites More sharing options...
Codger Posted March 27, 2018 Share Posted March 27, 2018 32 minutes ago, Roy vd M. said: Extraordinary work, really. This is going to be a gem inside any display cabinet. - especially MY display cabinet... No hyperbole needed; It presents as the real car - period. Link to comment Share on other sites More sharing options...
harveyb258 Posted March 27, 2018 Share Posted March 27, 2018 I wouldn't want to paint such beautiful work!!!! Link to comment Share on other sites More sharing options...
Haddewade Posted March 27, 2018 Share Posted March 27, 2018 Very nice work Graham. Link to comment Share on other sites More sharing options...
larchiefeng Posted March 27, 2018 Share Posted March 27, 2018 That is some seriously impressive work! Link to comment Share on other sites More sharing options...
CrazyCrank Posted March 27, 2018 Share Posted March 27, 2018 Watching your amazing work and imagining your skills, I think I'd rather to stop scratch building anything and learn knitting ...doing that I'll have probably more chances to reach an acceptable level of quality. My hats off, Graham Link to comment Share on other sites More sharing options...
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