Stuart 10V Build Log

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NickG:
I will be watching this with interest Chris :thumbup:, always fancied a go at a Stuart but always been put off by castings!

NIck

raynerd:
Well thanks all for the replies and suggestions. I`ve tried to follow your advice and done the following this evening.

I did appreciate that when I bore the standard I would need to face up the top surface for the bore and cylinder mouning surface to be 90deg to each other so I have enough left on the length of the standard to work with it further.

So first up was using Kwackers advice of turning up a bar to fit well through the unmachined standard bore, thread the end (M10) and bolt up the standard. As you explined, this ensures the feet are square to the bore.

Sorry for the pictures, my camera battery has gone so they are taken on my phone!

Now the feet are machined, I made some clamps so that they can slot around the casting centre of each foot. This looks to be how it is done from looking at my pictures in the original book "How to Build a Model Steam Engine" machining a 10V. It seems to be nice and solid and secure.

So the next thing is going to be boring it out but it got late and I thought I`d leave it until tomorrow and see what you guys thought of my setup first...

Thanks again for the help so far.

Stilldrillin:
Chris,
The last set ups are sooo much better than your first attempts. :thumbup:

I've never machined a small engine from castings. But, as a long time machinist, your first pics scared me somewhat...... :bugeye:

David D

raynerd:
Learning! :thumbup:

Lol, that being said, shouldn`t have been such a dumb a£$3 to attempt ! Glad you think it looks better, I think I`ll try and bore this out today.
Chris

NickG:
Chris,

I agree the last set-ups look better, but in my opinion, your first would have worked - as you say, the critical thing was the face square to the bore, so you would have had to bore it on the same setup in the mill. Out of interest, did you notice it taking an even cut when you did the feet and top face again in the lathe?

The only thing I have noticed is that you bored the hole for the bearings square to the bottom of the base rather than the top of the base that you skimmed, or did you skim the bottom too? I think it'll be ok, but i was just thinking, would it not have been best the way you first did it, i.e. both mating parts done in the same vice on the same machine - therefore if there was a slight angle built into it, you could flip one of the parts around and they'd be square again? Again, I guess the critical thing is that the bearing holes are square to that top face on the base now you know the standard is spot in.

Enjoying this, keep up the good work. :thumbup: :clap:

Nick

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