Alignment the crankshaft's S6 1930

[Kalle]

Hi like this at Christmas time.
Is there anyone who has a tip how to alignment the crankshaft's shoulders after I have changed the connection rod rollers. The axle has 37 hundred mm offset on the transmission side and 14 hundred mm offsets on the flywheel shaft when I check it with studs at the ends of a lathe.
I wish you all a Happy Christmas and a Happy New Year
Kalle

[eddie]

Hi Kalle,
             Your setup for checking the alignment of your crank assumes that the centres in the ends of the shafts are truly in the centre - they may not be! Also, the pressure on the centres may be inducing a false reading.
  It is better to support the crank on pairs of ball races, or knife edge rollers, positioned close to the crank webs - then rotate the crank and clock up the small end of the taper and the small end of the timing side shaft. A certain amount of adjustment can be made by squeezing the webs or wedging them apart as necessary. Checking the webs for parallel with a toolbit and feeler gauges will give a good idea where the adjustment needs to be made.

  Regards,
                Eddie.

[cardan]

Maybe Santa will bring me an Alpha Tru flywheel jig https://www.mbscooters.co.uk/images/products/IMG_4170.JPG but I doubt it. Like most mortals I have to make do with lesser set-ups. I'm pretty crap at aligning flywheels, but it's satisfying when the job is done.

Good luck Kalle, and best Christmas wishes to you too.

Leon

[douglas1947]

Hi Kalle,
I made prism by my own an srew them on my lathe.
Michael

[Kalle]

Hi Eddie and Michael
Thank you for your tips, how nice there are those who know what's up. I can manufacture such a tripod to check the measurements instead of in the lathe. How do you do the line alignment? Do you put the crankshaft in a bench and break back with a pipe on the shafts to make it right or how did you do that?
Have a Merry Christmas
Best regards Kalle

[Kalle]

Hi Leon
Thanks for your tips, i shall make the simulare tool.
Have an God Christmas and Happy New Year
Br Kalle

[douglas1947]

Hi Kalle,

My way to trueing the crankshaft is:
I look to the measure clock(s) and knock the front /rear part of the crankshaft (with a plastic hammer) to the right side to eleminate untrueness, holding the crankshaft in one hand. I never beat on the shafts.
T35 cranks have holes for steel rods to make an easy assembling possible.
Your crankshaft have not sutch holes.

Michael