Thread: Rob Roy

The frames are off the mill now for some hand work. If you look carefully you will see the curves on the blue(I need to remark the one at the bottom left as I wiped the marking blue off).


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Bolted back together


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Being new to the mill I kept forgetting which way to turn the wheels so a couple of stickers helps a lot.


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Frames now complete spent the day filing the curves sections and squaring internal corners where needed, deburring all the edges as well as the holes finished drill the five holes that I only part drilled and then countersunk those holes that needed doing. I will store this until ready for assembly or if it is needed to test fit parts.

Total of seven days work but not that is only a few hours a day.

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Nice machining and filing work Derek

Regards

Keith

Thank you Keith it takes me back to when I trained as a plant mechanic and I had to do filing and scraping straight edges and bearing (Yes that was when we use to scrape bearings). It is surprising how the words of the instructor come flooding back.

Ahhh memories of long, long ago.

I trained as a Fitter and Turner.

This is a great looking project Derek. Ill follow with interest. No doubt there are plenty of steam enthusiasts in the UK that you can turn to if you need specific advice.
I have access to a couple of metalwork machines but have very basic skills and haven't tackled anything as complicated as Rob Roy. Im assuming (maybe incorrectly) you don't have a lot of experience with mill and lathe so will be interested to see how challenging you find the project.

Tony

Originally Posted by tony_A

This is a great looking project Derek. Ill follow with interest. No doubt there are plenty of steam enthusiasts in the UK that you can turn to if you need specific advice.
I have access to a couple of metalwork machines but have very basic skills and haven't tackled anything as complicated as Rob Roy. Im assuming (maybe incorrectly) you don't have a lot of experience with mill and lathe so will be interested to see how challenging you find the project.

Tony

You are correct I do not have much experience with either machine the only time I used a metal lathe was many years ago at school and the milling machine none at all. So far everything seems to be going right I do tend to approach things very slowly and work out what my next move is for each day. The chassis frames I split into sections and tried to complete a section at a time, working out how I could machine that without to many moves of the work on the mill.

I have just started the front and rear buffer beams these may take a couple more days. So I should have some progress reports then

Done most of the buffer beam this week until I realised that I needed a milling cutter to complete them. So Monday ordered from Tracey tools they arrived this morning post office must have pulled up their socks at last even my Model Engineering magazine copy arrived two days early.

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On to yesterday I thought I would start another part while waiting for the cutter(always something can be made). That so far is great being able to do something until today. found one of the pieces of metal but the second must have been taken by the workshop gremlins.

So to help a little I had a little clean up not that it was that untidy as I do try to keep things clean and put away unless they are being worked on. still no sign of the part, Coffee time and onto the computer and ordered some castings for the rob Roy as well as a pile of steel also for the loco.

Back into the workshop and spotted an angle plate which had the smallest amount of rust trying to creep on to it I may as well get on top of that before it takes hold over to the vice and yes you guessed it there sitting in the vice was the missing piece of steel it is now with the other piece in a safe place until I forget where I put them.

Oh well another exciting week so far what will I loose next

Been a little slow as I had to go for an Abdominal aortic aneurysm scan as a precaution results were great so all clear for that.

Then today waited for delivery of some castings and steel so can now get on with some machining. Inspected the castings and they appear to be good quality I only got the 6 wheels, horn guides and axle block material as well as the cylinders as can be seen in the photo. First job will be the horn guides and then fit them when the rivets arrive.

No home made wheels here Keith I am cheating but they still need machining.
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A bit of work there, but a lot easier than fabricating or casting the items.
One step at a time and you will be making progress.
Watching with interest.

Just when I thought I was making headway today I ended up cutting a frame spacer the wrong length and had to remake it could not make the second one as the metal I was sent for that part was too thin so will be on the phone Monday morning.

I must remember to use the calculator correctly the plans are in fractions I then have to convert to decimal for the DRO and then remember to add the 1/2 diameter of the cutter I did this in my head and still got it wrong which is unusual for me as normally very good at maths. And I even brought a nice new scientific calculator.

Should have something to show tomorrow if I don't make another silly mistake

It happens.
Better to cut too long than too short.
We all make basic mistakes, so long as it does not draw blood and nobody gets hurt (apart from the hip pocket nerve).

Originally Posted by Handyjack

It happens.
Better to cut too long than too short.
We all make basic mistakes, so long as it does not draw blood and nobody gets hurt (apart from the hip pocket nerve).

I cut it over size to begin with but it was my calculations that were wrong, however spent today remaking the part was hoping to have the other plain one done but have to wait for the company I brought the metal from to replace it as the piece they sent was the incorrect thickness. They dealt with it in a fast manor now waiting for the postal service to get it to me.

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Also spent some time sorting my BA fixings and other fixture bits into a small draw unit I added some labels using my garden labelling machine which is very good as they do not fade like some do.




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Cut the two slots in each buffer beam for the main chassis frames to fit into, there also was a little filing as the cutter left a half circle at the end so had to square that up so the frames fitted right into them. They fit very snug so a nice push fit into them. This is the first of many dry fits. I need to make some brackets so they can be riveted together but that will have to wait as other stuff need doing before they can be fixed in place.

It is surprising how long cutting 4 total slots can take especially as I am a novice at this type of modelling

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