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Post by simplyloco on Dec 22, 2018 18:34:59 GMT
Onwards and Upwards!I'll be fixing basics first, and making it look pretty later. Here's the pic from the 'Done Today' thread.  WP_20181221_20_05_28_Pro by inkaboat, on Flickr The first fault to address was the crankshaft. When the crank was turned, the small end of the connecting rod flailed about like a Cheerleader's bits pompoms! There had been a pressing error therefore the crank pin was not perpendicular to the webs: one of the bores was 0.004" out of position. The absence of side thrust washers didn't help the situation either! Today's job was a new crankshaft and thrust washers. Machining the ends of the webs, utilising a simple stop on the vice jaws.  WP_20181222_12_02_13_Pro by inkaboat, on Flickr Drilling and reaming the two 3/8" holes. There's a balancing piece on the end of the jaws, and I'm using slip gauges on the bed stop to achieve the 0.75" pitch. I can usually repeat holes to 0.0004" or less using this method.  WP_20181222_12_35_15_Pro by inkaboat, on Flickr My new Eassom DRO is one thou out when compared to the slip gauge positioning...   WP_20181222_12_35_28_Pro by inkaboat, on Flickr Making them look pretty!  WP_20181222_14_29_30_Pro by inkaboat, on Flickr Certainly much prettier than the originals!  WP_20181222_15_36_46_Pro by inkaboat, on Flickr Slip gauges for the gap, and a straight through crank which will be sawn off inside the webs. It's the only way...   WP_20181222_16_07_12_Pro by inkaboat, on Flickr Crankshaft with new thrust washers. No more flailing about and it turns sweet as a nut!  WP_20181222_16_59_20_Pro by inkaboat, on Flickr Slide valve is stiff, so that is the next job. Merry Christmas everyone. John
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Post by simplyloco on Dec 23, 2018 18:31:46 GMT
Well, it leaks like a sieve - it's held together with CSK 5BA screws as I have to get some decent studding- and the flywheel wobbles, but it works and it doesn't knock! Just click on the pic to get you into flickr, and watch 33 seconds of satisfying model engineering! Please forgive my shaky handwriting and the noisy compressor. I now have to make it look pretty... John  WP_20181223_18_06_15_Pro by inkaboat, on Flickr |
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Post by simplyloco on Jan 16, 2019 19:34:51 GMT
Definitely an Apprentice Piece!I took it to pieces to find out why the crosshead didn't travel parallel to the base platform. Here's why: the end flange isn't perpendicular! John  not vertical! by inkaboat, on Flickr
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Post by simplyloco on Jan 16, 2019 23:18:46 GMT
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Post by Jo on Jan 17, 2019 9:00:34 GMT
Looks like you have an engine full of features there John  I hope you will have time to make some correct length, real studs with nuts for the cylinder. Jo P.S. Do you have the valve rod guide? I have a couple of spare ones if you need one. |
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Post by simplyloco on Jan 17, 2019 9:24:51 GMT
Looks like you have an engine full of features there John I hope you will have time to make some correct length, real studs with nuts for the cylinder. Jo P.S. Do you have the valve rod guide? I have a couple of spare ones if you need one. Hi Jo I am making the studs as we speak, with nuts loctited to the studs with 1.5 threads showing, just as I did with the Stuart Beam. I'd love a valve rod guide, as this one floats about all over the place! I don't suppose you have the one with the governor boss??  Thanks John |
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Post by Jo on Jan 17, 2019 14:44:05 GMT
I don't suppose you have the one with the governor boss??  That's why I have lots of the standard brackets, everyone brought a governor kit and it comes with another guide with the boss on the top. Stuart Turner might sell that casting separately from the governor set if you are lucky. I could take one with me to the London show tomorrow if you would like one to play with. Jo |
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Post by simplyloco on Jan 17, 2019 16:08:56 GMT
I don't suppose you have the one with the governor boss?? That's why I have lots of the standard brackets, everyone brought a governor kit and it comes with another guide with the boss on the top. Stuart Turner might sell that casting separately from the governor set if you are lucky. I could take one with me to the London show tomorrow if you would like one to play with. Jo That will be wonderful. i can make a boss and solder it on. SEe you there! John |
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Post by Jo on Jan 17, 2019 16:38:42 GMT
I've dug out a couple.. (one good one and one with a bit of sand build up to practise on ) I am hoping to be there about 9am, traffic willing (Farnham Roadworks  ). I would normally say look for the lady weighed down with castings but I am not planning on buying any (famous last words) Jo |
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Post by simplyloco on Jan 17, 2019 18:22:46 GMT
I've dug out a couple.. (one good one and one with a bit of sand build up to practise on ) I am hoping to be there about 9am, traffic willing (Farnham Roadworks ). I would normally say look for the lady weighed down with castings but I am not planning on buying any (famous last words) Jo I will be wearing a name tag with ykw on it!I John |
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Post by Jo on Jan 18, 2019 16:53:15 GMT
I didn't see you John and brought them home again  Jo |
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Post by simplyloco on Jan 18, 2019 19:42:55 GMT
I didn't see you John and brought them home again Jo We should have exchanged contact details! If you pm your address I will send an SAE. Thanks again John |
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Post by simplyloco on Jan 19, 2019 23:27:44 GMT
Today I made some modifications to the cylinder studs to pretty them up, as well as remachining the main bearings and making dome nuts for them. Here is the result. Quite pleased so far, but it will look better when it is painted! Slide valve tomorrow... John  new studs and bearings by inkaboat, on Flickr  more studs by inkaboat, on Flickr I munched the over length studs using this curvy tool. It worked a treat!  IMG_20190119_155424 by inkaboat, on Flickr |
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Post by simplyloco on Jan 24, 2019 18:41:29 GMT
One of my apprentices came round today so not much done - to be truthful it was a welcome break! It's great having three projects on the go: I can float like a butterfly and take time off for some brie... The Stuart is taking shape nicely. Here are a few pics. Grit blasted on my cheapie Machinemart gadget  WP_20190123_15_12_51_Pro by inkaboat, on Flickr British Racing Green, just so it will match my beam engine! I've dumped steel nuts: brass looks so much better against the paint!  WP_20190124_17_24_09_Pro by inkaboat, on Flickr A quick few cuts with the band saw and we are in business!  WP_20190124_17_48_13_Pro by inkaboat, on Flickr |
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,907
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Post by JonL on Jan 24, 2019 20:15:29 GMT
Barely recognisable from the original machine. Lovely job there.
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Post by ettingtonliam on Jan 25, 2019 3:44:01 GMT
Go the whole hog, fit the pump to the flywheel side. You are going to fit the governors aren't you?
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Post by simplyloco on Jan 26, 2019 11:30:03 GMT
Go the whole hog, fit the pump to the flywheel side. You are going to fit the governors aren't you? Governor yes, pump maybe. I'll just do enough to fund a week in a warm foreign resort! John |
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Post by simplyloco on Jan 27, 2019 21:27:14 GMT
This afternoon was spent making all the new brass nuts and steel studs, about 40 I think! Nothing is assembled yet as I'm waiting on my friend David with the big mill to pass me some 5BA brass washers. I might just reduce my consultancy rates to him to a mere £70/hr in return... John  WP_20190127_16_29_13_Pro by inkaboat, on Flickr I found a use for the Eassom DRO collet tray: perfect fit on the lathe bed for the tailstock bits when doing repetitive work!  WP_20190126_16_55_36_Pro by inkaboat, on Flickr |
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,907
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Post by JonL on Jan 27, 2019 21:30:54 GMT
Looks fantastic, although your wooden plinth could do with a bit of lacquer...
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Post by simplyloco on Jan 27, 2019 21:33:51 GMT
Looks fantastic, although your wooden plinth could do with a bit of lacquer... I have some better bits of wood for the final job, this was just a tryout! |
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). I would normally say look for the lady weighed down with castings but I am not planning on buying any (famous last words) 
