Return to index: [Subject] [Thread] [Date] [Author]

Re: Lubrication for Sliding Connection

[Subject Prev][Subject Next][Thread Prev][Thread Next]
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)pomeroy.bc.ca>
To: <seaint(--nospam--at)seaint.org>
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
of
> the tube or use a fabricated teflon bearing plate (such as Furon
Fluorogold
> 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
can
> provide information on allowable loads."
>
> I guess that would be the reasonable way to do it but I'd like to stay
away
> from the Teflon bearings. The loads are very minor and there is some
uplift
> and horizontal thrust from some cranked roof trusses. The teflon pads
might
> be expensive and somewhat tricky to detail for this fairly minor
connection.
>
> If I can get the ironworkers to install the bolts in the middle of the
slots
> and stop them from cranking down my finger tight nuts when they install
the
> locknuts I pretty confident that it will work. But I would like to put
some
> grease on the faying surface for insurance and to stop the plates from
> rusting together.
>
>
>
>