Scott flame licker build

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NickG:
Off to a flying start John, am watching with interest. Castings seem good quality so far.

Nick

shoey51:
I too am watching this John. I learn so much from these threads :thumbup:

spuddevans:
I too am enjoying your work. I also really like using the ali plate as a machining base/reference aid, sometimes just figuring out how to hold the object to the mill can be a trial, but this idea is one I will file away.

Tim

Bogstandard:
Many thanks gents.

HS93 talked me out of going into the shop this morning, so this is just an easy evenings work.

My DRO had remembered where the centre line was from yesterday, so it was just a matter of getting a zero datum from the end face.

Once that was done, it was an easy matter of spotting and drilling the three required holes. Horizontal work on the base is now done, except for drilling the oil cup holes, which can be done at any time, using the datums I have already created, even after it is taken off the holding plate.

Now this is where the plate comes into it's own. Swung to a vertical position, and clamped against the vice fixed jaw with a 3,2,1 block. This is plenty rigid enough for the jobs I am now about to do.

By having the 3,2,1 block hanging over a little, I can easily find the Y axis setting for the flat face I machined up last time.

And the machined end of the casting gave me the X axis position.

The X & Y were set to zero

And the figures that I had worked out were fed into the table, the table locks were then tightened up.

This put my quill spot on over the position that is shown on the plans. A hole was spotted and drilled.

A long series centre drill was then used to spot thru onto the second part of the casting.

The hole was then drilled using a long series drill.

Both holes in line. I don't have a machine reamer that will reach both holes, so this will be done with a hand reamer later.

I now moved to the second set of coordinates I had, then spotted and step drilled up to 12mm diameter.

The boring bar then came into action, and the hole was opened out to 13mm, the size of bearing supplied for the flywheel shaft support.

A nice slip fit for the bearing. Eventually, a pair of them will be Loctited into this hole.

So that is the baseplate basically finished, except for a little fine fettling and tapping one of the holes that I drilled earlier, and of course the three oil cup holes. I have already hand reamed the two cross holes.

I hope you can now see why I used the jig plate. Fairly easily, not only did I get the surfaces, top and bottom, level and parallel to each other, but also all the holes in the correct relationship and again parallel to not only each other, but to the base datums as well. So it was definitely worth doing on this build.

So the next step of the journey is to get that big lump of gunmetal into shape. I think this is one of those stages where I will have to hold the rough casting in the vice to get my first flat face, the bottom. Then take it from there.

Bogs

Dean W:
Very informative thread John, as usual.
I'm coming to this one a few days after it started. The work with the die filer makes me wish for one even more. ; )
Your explanation of the jig plate use should come in handy for a lot of fellows here. I especially liked the part about
putting the casting up on studs when you were getting started. That's one for my notebook, thanks.
Nice that you are getting some shop time! Glad for that.

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