Author Topic: Stuart Major Beam Engine  (Read 33904 times)

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #15 on: March 28, 2014, 05:06:31 PM »
Bill - yes I thought I'd deal with the big chunks as soon as possible, i have finished the beam and will start work on the cylinder soon.

Jo - re: 'snap' I recognise your Colchester taper turning attachment, but I presume your have a larger Colchester lathe because your cross slide has the tee slots at the back, which lathe is it?
DRO yes I would like one of those, perhaps something for my next birthday or Christmas please.
Andy :cheers:
« Last Edit: March 28, 2014, 05:28:32 PM by Chipmaster »

Offline Jo

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Re: Stuart Major Beam Engine
« Reply #16 on: March 28, 2014, 05:18:04 PM »
That's my little diddy Colchester Master 8)

Jo
Enjoyment is more important than achievement.

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #17 on: March 30, 2014, 05:49:31 PM »
I set the taper turning attachment on my lathe to copy the taper of the column casting. Form tools were used to machine the curved sections.


The bottom and top of the column were milled to ensure they were parallel and the correct height. The mounts for the trunnions that support the beam's axle were machined at this stage.



Milling and boring the trunnions


Trunnions fettled and fitted, the entablature was machined and added at this stage.

Making bearing shells using cored bronze sawn in half then soldered back together.



Using the trunnions as jigs


Machining the axle

A satisfactory fit

I'll finish off the two bearing caps to suit whichever lubricators I chose.


Andy


Offline b.lindsey

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Re: Stuart Major Beam Engine
« Reply #18 on: March 30, 2014, 06:23:04 PM »
That's some very nice work and finishes on those parts Andy. You are really moving along on it!

Bill

Offline Jo

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Re: Stuart Major Beam Engine
« Reply #19 on: March 30, 2014, 06:30:18 PM »
Andy nice to see your work on the Column  :ThumbsUp:

I will be having something similar to do with my Otto Langen column which is 320mm tall. With the added opportunity that it needs to be accurately bored for most of that length  :ROFL:

Jo
Enjoyment is more important than achievement.

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #20 on: March 30, 2014, 06:47:19 PM »
Hi Jo.
The bore of the Stuart Major column could be left rough but it is quite visible so I will try to machine the upper section purely for cosmetic reasons. To do that I will mount it on a low profile 6" rotary table and work on it with my vertical milling machine which has just about enough clearance. I don't fancy trying to do it in my lathe even with a fixed steady. The alternative is to fill the top of the column :thinking:
Andy

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #21 on: March 30, 2014, 06:50:22 PM »
Hi Bill - I just love the finish I get using suds oil, I have a stripe up the wall and across the ceiling to prove it!

Andy

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #22 on: April 21, 2014, 10:15:20 PM »
« Last Edit: April 22, 2014, 05:24:18 AM by Chipmaster »

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #23 on: April 21, 2014, 10:26:00 PM »
However the bosses on the beam were not concentric with the holes so I milled each of them. In a couple of cases the bosses were concentric on one side of the beam but not the other. I thought if I didn't deal with it at this stage I probably wouldn't sort it out in the future.


[url=https://flic.kr/p/mc9Wwt]

[url=https://flic.kr/p/mcaJjt]

A Dremel was used to tidy it up.
[url=https://flic.kr/p/mcaRpa]

[url=https://flic.kr/p/mc3X5H]
I have been diverted on to decorating recently but should finish the crankshaft supports and bronze bearings over the Easter break.
Andy
« Last Edit: April 22, 2014, 05:25:40 AM by Chipmaster »

Offline bronson

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Re: Stuart Major Beam Engine
« Reply #24 on: April 22, 2014, 02:43:04 AM »
I really like beam engines, following with great interest. Really nice machining of your parts. Can't wait to see the final product. Bronson

Offline fumopuc

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Re: Stuart Major Beam Engine
« Reply #25 on: April 22, 2014, 05:29:43 AM »
Hi Andy, I like these "Monster" castings. Every time I see a video of this beam running, with its elegant motion, I get in trouble with my wish list. Great job, following along.
Kind Regards
Achim

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #26 on: April 22, 2014, 06:33:33 AM »
Thanks Achim,
the 'monster beam' casting was rather challenging when I wanted to swing it round on a rotary table, it's about 15 inches / 38 cm long and had to be set up several times to avoid hitting the column of my milling machine.
Andy

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #27 on: April 22, 2014, 06:45:31 AM »

Offline Chipmaster

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Re: Stuart Major Beam Engine
« Reply #28 on: April 22, 2014, 10:45:25 PM »
I messed up the second crankshaft bearing today  :toilet_claw: so I had a go at making the pedestal instead, back to making bronze bearings tomorrow.

Milling the base of the pedestal that supports the outrigger crankshaft bearing housing.
Pedestal by AGB engines, on Flickr
Marking the height of the pedestal.
Marking the height of the pedestal by AGB engines, on Flickr
Milling the top of the pedestal
Pedestal by AGB engines, on Flickr
Ready for cleaning up
Pedestal by AGB engines, on Flickr

Andy

Offline Don1966

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Re: Stuart Major Beam Engine
« Reply #29 on: April 22, 2014, 11:50:48 PM »
Hi Andy, I have been following along quietly. Those casting are turning out great. Some great fabrication going on here also. I like............ :praise2:


Don