Too tight ?

 
  Fitting up the clutch gear rollers in the '39 and I have run into
something ... the clutch gear turns smoothly one direction , but after a
couple of turns the correct (ccw as viewed from the clutch side) direction
it starts to crawl in the outer race and binds up . The rollers are
"supposed" to be the right size (race ID minus clutch gear OD , divided by
two , then subtract a half-thou for a clearance of .001 total), but I
suspect they are too big . I'm trying to build this with as tight tolerances
as I can , am I wrong ? Do I need to loosen it up a bit more ? The current
rollers are 9091's , at .1524" , standard size rollers are 9090's at .1520"
. I need to get 9090's for the mainshaft , since I found a new mainshaft and
see no sense in oversizing with all new parts (the side cover is also new) .
I did do a very light cleanup on the (outer) race with a toolpost grinder
setup , is it possible the surface texture left by that operation is causing
the problem ?
  A round for the gearheads ...
--

Snag aka OSG #1
'90 Ultra , "Strider"
'39 WLDD "PopCycle"
The road goes on forever ...
none to one to reply

 
Reply #2
Hopefully the first reply will show before this one.
Just sunk in my thick skull that you are using a "tool post" grinder.
I've read a lot of your other posts on "wrenchin" and "fixin", so you can
probably ignore this, but,
Them tool post grinders gotta be "tight" for best results. I imagine your's
is. So you can probably get by with cleaning up the outer race with some
crocus cloth and oil. Just don't move it in and out. (snerk).

Peace
Milo

 wrote:


Could be, it is also possible there is a slight taper now as well,
(it does not take much)

are you using a good inside bore gauge?

 are you using a gauge that you use a mic on to read? now you have
more ways to get a different measurement from just a tad tighter on
the mic one time and a tad looser on the mic another time

 a telescopic set such as this
http://en.wikipedia.org/wiki/Image:TelescopicGauges155-905.jpg

sometimes it is so easy using something similar to the latter to get a
incorrect reading (it would only take a half of tho) to make something
to tight ya know this though, just thought I would mention it again

IOW's it don;t take much to make 1 tho clearance a half tho clearance






FLF SENS BS AH
www.bikershut.net -

 wrote:

BZZZZZZZZZZZT

you do not want loose rollers in the cranks!,  make sure you line bore
the cases as well. make sure your rods races are perfect

FLF SENS BS AH
www.bikershut.net -