Enlarged rocking engine build

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Ross:
Hi everyone,

Finally got back onto this today.

First I made a mandrel for clamping the crank wheels while drilling the offset holes.

I drilled the first hole with no problems. But on the second I over tightened the nut and stripped the thread, I had to put the 3 jaw back on and skim the face.

Clocked and drilled.

Then I drilled the holes for the grubsrews to fix onto the crank. And. Threaded M3.

Ross:
Hi everyone,

I ordered some aluminium for the engine frame a while ago, and it arrived today

I had a go at filing the edges of the engine frame square. And being probably the worst filer in the world even using a square and taking off the high spots, I was tearing my hair out! I don't think I can get any straighter than what I've ended up with!

The only problem being is that the rectangles are now 2x1.5 inches they need to be 2x1.25 I don't particularly fancy trying to file the longer edge square but I'm worried that the extra .250" height will dwarf everything else! Ideas?

Ross

Stilldrillin:
Ross.
If you're worried about sawing/ filing 1/4" off, accurately.

Do you know anyone with a mill? :scratch:

David D

Ross:

--- Quote from: Stilldrillin on November 01, 2012, 06:47:50 PM ---Ross.
If you're worried about sawing/ filing 1/4" off, accurately.

Do you know anyone with a mill? :scratch:

David D

--- End quote ---

Not anyone nearby I don't think, it dosent have to be too accurate but I will need use of a mill to do the part that attacthes to the cylinder so it holds everything sqaure. :scratch:

NickG:
You could leave it as it is Ross, not bother with the turned legs and sink the flywheel into the base? You should be able to get the ends square if you have a vice and just using the top of the jaws as a guide or clamping a known square bit of metal next to it in the vice and using that as a guide?

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