Subject: RE: Loctite on carrier bearings?
Author: Bruce Giller
Date: May 10, 2005, 11:38 AM
Post ID: 1718839859
What about using Loctite's bearing retaining adhesive (#681 ?) instead of
red or blue thread locking ? It might have different releasing properties.
Bruce
-----Original Message-----
From: Greg Field [mailto:gre-@gregfield.com]
Sent: Tuesday, May 10, 2005 11:39 AM
To: Loopfram-@topica.com
Subject: Re: Loctite on carrier bearings?
I haven't got the u-j yet. Should today.
I actually did the test last week.
Found another bearing yesterday, and tried it again with blue loctite.
It stuck really well. It sets up really fast, in under 5 minutes. I had
to pound it out, but I was able to do so with a plastic dead-blow, and
it came out without need for heat or destroying the bearing. This was
after setting up for less than an hour (which is all the time I had),
so I don't know if the bond would become overly strong after longer
setting.
I'm pulling another carrier bearing out of a bike today, so I may try
it again, to see if time makes the bond too strong.
I actually believe that if you don't have to pound the u-j into the
carrier, it may last longer, since you're not side-shocking the carrier
and end-shocking the u-j bearings with hammer blows. Seems like when I
peen them, I have to pound them in, just as I have to with brand-new
parts. If the loctite gives a good enough bond between the slip-fit
parts to withstand the inertia of regular use, and is
"disassembleable," that's surely the way to go. In my opinion, the red
is not disassembleable. The blue seems to be.
So, the question remains, does the loctite hold in service? Have any of
you had occassion to disassemble a u-j/carrier that you had earlier
bonded with loctite? Did the loctite keep the u-j yoke from spinning in
the carrier, or did it give up the ghost in service? I've never had to
go back in to see if it worked.
If I had my druthers, I'd JB Weld the carrier to the U-joint while the
u-j and carrier are on the bench, so I'd be sure of a good bond. Then,
I'd slip them as a unit into the swingarm. This would require slightly
enlarging the swingarm's bearing tunnel for a slip-fit, so you don't
have to pound the u-j/carrier unit into the swingarm.
How then to fix the carrier in the swingarm (you could not install the
circlip)? Maybe loctite around the outside edge of the carrier, leaving
off the circlip? This might work because you usually have to heat the
swingarm to get them out anyway, so that would melt the loctite. The
only question is does the carrier get hot enough in running to also
melt the loctite? I'd bet not, but don't really know. I may try this on
one of my bikes.
On Tuesday, May 10, 2005, at 05:21 AM, John Chicoine wrote:
| Thanks for that input Greg. I've got a carrier bearing that turns real nice, but the inner race is blued. This tells me that the u joint will spin even in a good bearing if not tight in the inner race. Perhaps a temp loctite is the way to go or some prick punch marks. My goal w/ my rebuilds is to put a ligh knurl on the u joint yoke. Just enought to make it grab. Now if I could only find my knurling tool I'd start doing it!!!!!!! Did you get the u joint that I sent? Perhaps my advice is what promted your investigation. John C. |