This is what Sutherland's calls a Type II Maxy cotterless axle. Type II refers to the threaded axle with nut type fastener and Maxy refers to the Sugino Maxy crank series. Luckily the axle markings are fairly uniform so a Sugino axle can be substituted for an SR etc.
A 3S2 axle has a 2 degree taper for a 68 mm bottom bracket shell. I won't go through the dimensions but a 3S or (3S) axle would be an exact substitute. A 3N or 3 SS would be slightly shorter overall and a 3T slightly wider. These were common axles in their day or could be pulled from any junk Fuji S10S or other universal Japanese bicycle.
Joe Bender-Zanoni
Great Notch, NJ
> List members,
>
> Will I be able to easily find a replacement bottom bracket spindle for my
1978 Raleigh Super Course with Raleigh-pantographed Sakae SR alloy cranks?
Unlike the usual cotterless spindles, this one doesn't use crank bolts. The
spindle has integral studs on both ends. Nuts thread onto the studs to hold
the crank arms onto the spinle's tapered square shanks. On one side the
stud has stripped and is not repairable. The spindle is black in color and
says "3S2" on it.
>
> I would prefer to replace the spindle with one that uses crank bolts
instead of the integral stud/nut combination. Is a replacement or
compatible spindle something I should expect my local bike shop to stock or
is this a vintage part I will have to hunt for?
>
> Thanks,
>
> Pete Rutledge
> Woodbridge, VA