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Bowman Loco Cylinders.

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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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