The Shop > Tools
Shop made tools
PekkaNF:
is there any other way?
http://www.homews.co.uk/page307.html
Pekka
mattinker:
Find a wrist pin (piston gudgeon pin)or two from a large truck engine when looking for pistons to melt, ready made cylindrical squares!
Regards, Matthew.
PeterE:
It was some time since I read this thread and now notice I missed a question from houtenkrullen, sorry.
I made my cylindrical square according to the design described by Harold Hall, see the link provided by PekkaNF above where you get both dimensions and work description. Simple and easy and you wind up with a precision tool for the toolbox.
Using a gudgeon pin can also be a solution as the precision is very good with them as well. The potential snag with a pin is that the through-hole may be a bit big and it may not be straightforward when wanting to secure the pin/square to f ex a milling table. The pins I have come across have been small so I have no mental "picture" of sizes etc so I may be wrong. It would be nice to see a picture of a large engine gudgeon pin to get a reference.
BR
/Peter
mattinker:
A truck gudgeon pin can be 100mm x 25mm, I think it's easier to make a special washer to adapt to hold downs!
Regards, Matthew.
Manxmodder:
I have a couple of wrist pins from Perkin's 6354 diesel pistons. They are about 35 mm dia and 84mm long.
A chart that lists some piston assy and pin dimensions linked below......OZ
http://www.dieselenginespares.com/Piston_Cat.htm
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