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Bowman Loco Cylinders.
Stilldrillin:
A German member of my other forum asked if anyone could help him...... He could only obtain metric tube, and needed imperial.....
Piece of bar, drill, ream, top od to size.......Course I can! :thumbup:
I guess something got lost in translation........ He wanted cylinders! :bugeye:
Here`s what he had just bought. A 193? Bowman loco.
Stripped......
He sent me a sample, from another loco......
Got off to a bad start, when the 3/8” tube I had ordered turned out to be 3/8” o/d instead! :bang:
Could find nothing, anywhere! So, I appealed on here, and a kind Gentleman in America sent me the perfectly sized piece!
Thank you, Joe! (75Plus), yer a Gentleman! :thumbup:
Parted to slightly over length..... Then made end plugs.
The bore is a couple of thou` over the original...... So, have to make a pair of pistons to suit......
Milled a 2" length of 5/8" dia brass, for the 1/2" wide cylinder blocks.
10mm ball end cutter + chamfer....... Looks ok!
Sawn in two & cleaned up. Then drilled holes & tapped 7BA pivot thread........
Made new pivot screws & nuts.......
Group photo........
Next job, soldering! Never liked doing that....... Would rather be machining....... ::)
I made an aluminium pedestal support, plus a wooden handle to fit the bore.......
Tinned the bore and the cap. Then pressed & sweated them together......
Skimmed the ends to length.......
And drilled the 1.5mm holes.....
Screwed the block to a 7BA aluminium support. Tinned the cylinder & block.
Then aligned them together with a 1.5mm drill shank, and re heated.....
After a good clean up, I think they came out ok!
Obligatory group photo.....
Oh, yes! In the pack with the samples was an SEL piston...... Could I make two of those, as well...... Pleese?
Note..... The top one`s still awaiting the big end rad machining......
Just received this pic from a very happy man...... :D
The loco will be rebuilt properly, during the winter months...... :thumbup:
David D
dsquire:
David
Very well done and right nice of you to help out a fellow modeler. He should be well pleased with those bits. :ddb: :ddb:
Cheers :beer:
Don
Reckless_Engineer:
Another cracking Job david :thumbup: How do you get time to do your own bits lol
sbwhart:
Nicely done and shown Dave.
Hope he makes a nice job of the rebuild to match your cylinders.
Stew
Brass_Machine:
Very nice job David! Very professional looking.
Eric
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