I have machined some replacement bushings for a motorcycle swing arm . The
inner sleeve is 4140 steel approx. 1" in diameter, there will be an ampco 18
bushing 1.6" long riding on it . This unit will see maybe 20 degrees
rotation in normal use . I was originally planning on hardening the inner
(steel) sleeve before final sizing . I do have a light duty toolpost
grinder , and can get the proper stones . I'm at .008" -.010" oversize now
for a .002 clearance fit .
I'm wondering if I need to harden them as originally planned ... or if a
nicely ground finish without hardening will give acceptable wear - I only
wanna do this once . I do have what I need to treat these , I'm just trying
to be lazy ...
14 years ago