Using a small lathe as old and rickety as myself, have found that for any hope of maintaining accuracy turning between centers is the way to go. I can get the old hunk of iron to hold within 0.001 over 8 inches between centers so long as I don't sneeze. It is too this end that after some keyword searching the term "jig" made itself known loud and clear. Being too flipping cold to go out to the barn the idea looks good on paper.
The jig(s) should be within my limited abilities to make, each being a left and right hand one with the center point spacings identical to each end. Figure that once securely fastened can remove all the bits that are not of the crankshaft without loosing position as I experienced the pleasure of, using a three jaw. All I can see at this point is some sort of spacer will be required to fill in the gap left from turning the journal prior to the main shaft to take up the pushing force (technical term) from the tailstock and whatever stress the cutter transmits..
I am lousy at descriptive jargon, even after 20 years pounding rivets on the Triple 7's I never got the port - starboard lingo down.
I like pictures hence the picture, anyone see inherent boo boos on this route
Thanks
The jig(s) should be within my limited abilities to make, each being a left and right hand one with the center point spacings identical to each end. Figure that once securely fastened can remove all the bits that are not of the crankshaft without loosing position as I experienced the pleasure of, using a three jaw. All I can see at this point is some sort of spacer will be required to fill in the gap left from turning the journal prior to the main shaft to take up the pushing force (technical term) from the tailstock and whatever stress the cutter transmits..
I am lousy at descriptive jargon, even after 20 years pounding rivets on the Triple 7's I never got the port - starboard lingo down.
I like pictures hence the picture, anyone see inherent boo boos on this route
Thanks