Well I went and bought a PM Research kit for my next(or next,next)project. looks like the crankshaft will be a bit difficult.Should I turn between centers? Has someone out there completed one of these? Any guidance would be appreciated.
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PM Research #5 crankshaft turning
- Thread starter knifer-one
- Start date
These might help:
http://www.smithy.com/machining-handbook/chapter-3/page/33
http://www.smokstak.com/forum/showthread.php?t=66654
Of course if you have a tool post grinder you can turn the piece slowly by hand.
At least yours is somewhat smallish.
http://www.smithy.com/machining-handbook/chapter-3/page/33
http://www.smokstak.com/forum/showthread.php?t=66654
Of course if you have a tool post grinder you can turn the piece slowly by hand.
At least yours is somewhat smallish.
knifer-one: You can do it on the lathe. Use you're four jaw so that you can off-set it and turn the center shaft and clean up the inside flat faces. You're going to need a precise spacer in the center so you don't distort the work with pressure. You can hold the spacer in place with a hose clamp. But you have to have the spacer SECURE. Next center the work on the long shafts ( you have a little extra legnth to work with) in the four jaw with a center. Face off the outside flats and turn the shafts to size. If you don't have a mill the 4 sections that are still rough can be dressed with a file. Roger