On Fri, 26 Sep 2014 22:54:38 -0400, wrote:

On Fri, 26 Sep 2014 22:25:35 -0400, Ed Huntress
wrote:

On Fri, 26 Sep 2014 21:38:07 -0400, wrote:

On Fri, 26 Sep 2014 14:02:42 -0700, "Bob La Londe"
wrote:

I'm getting ready to reassemble a quill spindle, and I have two choice for
grease. The guy who sent me the spindle sent me a small film canister of
"Kluber" grease. He said it was the cat's meow for spindle bearings, but I
can't really tell exactly what it is since he sent it in generic film
canister. 1`

I also have most of a squeeze tube of MolyKote BG-20 left over from when I
regreased the Yuasa speeder I picked up. Its rated for high speed, high
load, and high heat. It is some pretty decent looking stuff on paper, and I
know exactly what it is as its in the original factory packaging. I've got
enough in the tube to lube dozens of bearings. My instinct is to pitch the
film canister and use the MolyKote, but I was wondering if there was any
inherent problem with using this stuff in a "normal speed" application.
96-3600 RPM. Loads upto about 3 horsepower before VFD programming trips an
error.
My first thought was the moly grease that is used to pack CV joints
in front wheel drive cars. High pressure, high temperature, high speed
application. I've got about half a dozen tubes of the stuff (VW Audi)

Extreme pressure, reasonably high temperature, but not high speed. A
car's wheels at highway speed typically turn less than 1,000 rpm.

And the speed of the wheel at highway speed has nothing to do with the
speed of the bearings in the joint.That depends on how tight the turn
is. And how big the bearing is. Nothing to do with wheel speed,
because in a straight line the U joint bearings virtually do not move

Your spindle shouldn't generate so much heat that you need
high-temperature capability. My understanding of machine tool spindle
lubes is that they should be high-pressure, low-friction (no more
viscosity than you need) types, and that they must stick to bearings.

In terms of brands and types, though, I'm decades out of touch and
can't help.
At a 40 degree angle the angular velocity of the bearings varries
from .766 to 1.3+ times nominal speed. Also, rpm is a pretty useless
measure of speed in a bearing. What is important is the feet per
second movement in the bearing.

See http://www.sdp-si.com/D757/couplings3.htm for more information.
..
Also, doing a bit of research I would say NOT to use moly grease on a
high speed roller bearing -
Greases containing moly are recommended for roller bearings subjected
to very heavy loads and shock loading, especially in slow or
oscillating motion such as found in universal joints and CV joints. If
such greases are used in high-speed bearings, problems can be
experienced with roller “skidding” where the bearing roller fails to
rotate through the full 360 degrees due to reduced friction. As a
result, the roller develops flat spots, and its service life is
reduced. (from an article in "machinery lubrication" magazine.)

So I'll retract my suggestion to use the CV Joint grease. regardless
WHAT speed is encountered in the joint.