Potty Over Crank Wall Engine

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sbwhart:
Thanks for your kind thoughts Don

Thanks Dave Hope things work out OK for you to.

Thanks for you comments:- Kenneth and Saw

:wave:

I do like to show things step by step, as it's not always appreciated how much thought and planning has to go into making a part, its far more involved than just hacking away at a chunk of steel and hopping it will come out right at the end.

Stew

raynerd:
Stew, amazing stuff and great photos. Two trivial questions compared to the rest of the work and setup you have shown... firstly what blue layout ink do you use? Your parts always look much darker and clearer layout out than my efforts- I`m always squinting to see my markings never mind capture them on camera. Secondly, exactly how did you pin the two piece together? I have a feeling if I tried this mine would separate mid-machinging. You said you used 2 sides tape and a dowel. Just standard 2 sided tape? How was your dowel inserted - a hole drilled in one side and a matching hole whole on the other with a dowel glued in place?

Excellent work -can`t wait to see it running!

sbwhart:
Thanks Chris

The blue I use is just standard engineers marking blue from Chronos, I put it on with a brush and let it dry for 1/2 hr, the lines show up better if you applied it to a shiney serface.

The dowels I use are 3mm silver steel but I drill No 32 or No 33 which is just under 3mm so that the dowels are a light drive fit. Try and dowel the parts together before you square the stock up that way it will be like working with one solid lump of steel and the parts will be identical when parted, the two sided tape comes in handy just to keep the bits together whilst you drill for the dowels, the tape is just cheep stuff I got from the local market works OK for me.

Doweling parts together is used a lot in jig and tool manufacture:- the tool room I served my apprentiship in made a lot of press tool with parts doweled together, to maintain alignment.

Hope this helps

Stew

sbwhart:
Bin thinking about the marking blue, I guess on a dull or black hot rolled surface marking white would show up the lines better, I think I've seen castings marked up this way I wonder what was used, any ideas.

Stew

andyf:
Maybe you could use paint - white primer or undercoat would do.

Andy

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