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Re: Lubrication for Sliding Connection

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Based on absolutely no scientific basis whatsoever, I would use a white
lithium  grease.  My Dad is a mechanic, and he says that if you use that
type of grease on a fastener, it will never seize, it will always work
itself loose, and even if you try to clean it, you will never be able get a
nut to stay on that bolt ever again.  (He is prone to exaggeration, but I've
used this grease, and it is difficult to clean off of anything, and seems to
lubricate pretty well.)

Just a thought.

Conrad Guymon, P.E.

----- Original Message -----
From: "John MacLean" <john_maclean(--nospam--at)>
To: <seaint(--nospam--at)>
Sent: Wednesday, March 07, 2001 8:39 PM
Subject: Re: Lubrication for Sliding Connection

> William Sherman:
> "I would either epoxy bond a thin sheet of teflon to the bearing surface
> the tube or use a fabricated teflon bearing plate (such as Furon
> bearing plates). If bearing pressures are low, use the bonded sheet; if
> bearing pressures are high, use the fabricated bearing plates (higher
> cost)."
> James Lane:
> "Can you go to a slide bearing pad devise and forget about finding a
> lubricant. There are companies that manufacture this type of devise and
> provide information on allowable loads."
> I guess that would be the reasonable way to do it but I'd like to stay
> from the Teflon bearings. The loads are very minor and there is some
> and horizontal thrust from some cranked roof trusses. The teflon pads
> be expensive and somewhat tricky to detail for this fairly minor
> If I can get the ironworkers to install the bolts in the middle of the
> and stop them from cranking down my finger tight nuts when they install
> locknuts I pretty confident that it will work. But I would like to put
> grease on the faying surface for insurance and to stop the plates from
> rusting together.