bob prohaska wrote:
How were crankshafts made before the development of specialized
machine tools? I've looked around on the Web and found no
description that doesn't rely on purpose-built machinery.

I did find http://modelengines.info/goldeng/const/crankshaft.html
but I can't figure out how the author located the offset center
holes in the blank.

Thanks for reading,

bob prohaska



You can make a crankshaft using nothing more than 2 center points a
scale, a pair of calipers, a hacksaw and file if you want to do it manually.


--
Steve W.