[SEL] Drawbar/Turntable Trailer

[Dave Rotigel]

Well documented Peter! Looking forward to more reports/pictures as  
progress continues!
	Dave

On Feb 10, 2011, at 4:18 PM, Listerdiesel wrote:

> A few of you may remember our questions regarding the brakes that we
> were going to use on the new trailer/RV that we are building.
>
> Well things have moved along a tad, we expect to start welding the 6.5
> metre (21ft) step-frame chassis next week.
>
> Since last year-end we have got together all the bits and pieces that
> we need, 3 axles, 3.5ton coupling, wheels/tyres and so on.
>
> 3 sheets of 21mm (13/16") honeycomb sandwich was collected a few weeks
> ago for the floor and internal divider, heavy-duty checker plate for
> where the engine trolley sits and so on.
>
> We bought a damaged caravan last weekend to we can break it for the
> bits we need, shower, cooker/fridge etc etc.
>
> Tonight we collected a couple of hundredweight (1cwt = 112lbs) of new
> 304 and 316 stainless blanks for the front pivot pin and bearing
> support.
>
> Our little 5" lathe would probably baulk at that, especially in 6.75
> diameter bar slices, but we were pleasantly surprised at how well it
> coped. We used a carbide tool, DCMT replaceable tip type, and some
> high-sulphur (sulfur) cutting oil for when we had to put a 20mm drill
> through the final 14mm thick blank. We had a fair bit of waste as the
> slice was 'wonky', but all in all we were pretty please.
>
> Pictures of tonight's activities are here:
>
> This is the next largest piece, this is for the safety retaining cap
> on top of the pivot pin. This is 304 stainless and 5.75" diameter.
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer29.jpg
>
> The interrupted cutting didn't cause any problems, we had a used tip
> in the holder and it went well. The degree of out of true can be seen
> in the next two pictures as we gradually bring the face true.
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer30.jpg
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer33.jpg
>
> The tool holder is only 10mm square and the tip is small, pictures
> following show the tool and tip.
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer31.jpg
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer32.jpg
>
> Eventually it got to the point where we had only a small area left.
> and then it was gone.
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer34.jpg
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer35.jpg
>
> Turned it over and started on the other side....
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer36.jpg
>
> Had to put a 20mm hole in the centre, which was a bit scary, but a new
> 10mm pilot (after centre drilling) went through fine, we had some
> high-sulphur cutting oil to use and it certainly did the job. Even the
> 20mm drill went through with nice swarf coming out as we drilled. No
> trouble at all.
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer37.jpg
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer38.jpg
>
> Then we put a bit of M20 studding into the 3-jaw chuck with a nut to
> hold it behind the jaws, and put the disc on to face the rim.
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer39.jpg
> http://www.stationary-engine.net/Forum/Images/Uploaded/DBTrailer40.jpg
>
> I'm going to have a go at one of the larger pieces tomorrow, now that
> I know the lathe and tooling can cope. Speed was the slowest it would
> go down to without engaging back gear, it is a 5" centre height Raglan
> Littlejohn lathe.
>
> Peter
> -- 
> Peter A Forbes
> Email: listerdiesel at gmail.com
> http://www.oldengine.org/members/diesel
> http://stationary-engine.co.uk
> http://www.oldengine.co.uk
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