And if the axle happens to be too long, can it be filed down so it fits?
hardened steel axles may make your file toast, ,
and definitely don't drag the file backwards, think 'saw, not sandpaper'.
better to measure, put a nut on to restore the threads , after you use ... the grinder..
Nut will push the burrs out of the threads .. so you can put the cones etc. back on,
to put the thing back together..