Hi Cy,
You don't have to hate to say that I'm wrong, since I obviously am, and
I appreciate the correction. Of course you're right that Loc-Tite is a
brand name and the company makes a lot more than thread locking
compounds, but the name has become somewhat of a generic for thread
locking compounds. I once worked as a race-engine builder, and I used a
lot of Loc-tite Stud and Bearing Mount. It seemed to be a bit nasty in
terms of how it reacted with steel fasteners, but perhaps what I was
seeing was the residual compound or corrosion caused by nitromethane
racing fuel. I didn't know that heat would help with the removal of a
fastener that has been installed with Loc-tite, but that's good
information and it may come in handy some day. (I still dabble with
scale race cars and occasionally have to resort to Loc-tite to keep
things from coming apart.) Anyway, things for the clarification.
Paul
Cy Galley wrote:
>
> I hate to say that your blanket statement that "Loc-tite is extremely
> corrosive (that's why it works)." is WRONG but it is! First "Loctite" is a
> brand name for many, many products. They run from thread lockers to
> lubricants. There are epoxies, gasket materials, anti-seize, rust proofers,
> and even hand cleaners.
>
> If you are referring to thread lockers; then retention is done by setting up
> by the exclusion of oxygen. You can precoat and then assemble years later
> and it still works. One statement from the factory manual says that it
> eliminates galvanic corrosion in aluminum and magnesium. These thread
> lockers meet strict Mil-specs (MIL-S-46163A) so they can be used in miltary
> and aviation applications. They are FAA approved for aviation use. They
> come is various strengths, and as they get stronger, they are removable by
> the simple application of heat. But the low strengths are easily removable
> with normal hand tools in the same order of lock washers without the limited
> torque range.
>
> Cy Galley, TC - Chair, Emergency Aircraft Repair, Oshkosh
>
> ----- Original Message -----
> From: "PAUL STENQUIST" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Thursday, April 12, 2001 8:30 PM
> Subject: Re: screwmount adapters: how to keep them on?
>
> > The adapter is supposed to stay in the camera body. There's a spring
> > clip that keeps it there. You can use a screwdriver, fingernail, knife,
> > or other similar object to release the clip and remove the adapter. You
> > can mount an adapter on each lens and remove the locking clip from the
> > adapters. I would just screw the adapter on snugly. It should stay put.
> > Loc-tite is extremely corrosive (that's why it works). I wouldn't want
> > to get it anywhere near a camera or lens. (You can also buy yourself a
> > Spotmatic F and throw away the adapters.)
> > Paul
> >
> > [EMAIL PROTECTED] wrote:
> > >
> > > Now that I have acquired ttwo Vivitar Series 1 telephotos--the 135/2.3
> and
> > > the 200/3.0--I find myself annoyed by the M42 screwmount-to-K mount
> > > adapters. When I set about to remove the lens, the adapter stays in the
> > > Super Program body; the lens unscrews from the adapter. It's VERY
> annoying
> > > to have to extract the adapter, with whatever tools I have available, so
> > > that I can fit the body with another lens. (That is the idea of
> > > interchangeable lenses, isn't it?) Last night I used a screwdriver, but
> I
> > > realize this is a no-no.
> > >
> > > I had hoped that by using genuine Pentax-brand adapters I wouldn't face
> > > this problem, a problem that I first experienced last year when using a
> > > Samigon-brand adapter to fit an 85/1.8 screwmount lens to my Super
> Program.
> > > The Samigon actually came with a little tool to extract the adapter.
> > >
> > > If I'm going to have this problem each time he removes the lens, I might
> as
> > > well dedicate a body to it. If I decided to do that, I could have bought
> > > these lenses in their multicoated versions in Minolta mount, or Canon,
> or
> > > Olympus. The screwmount units--certainly the 200/3--appear to be
> > > single-coated.
> > >
> > > I'm tempted to use Loc-Tite to more or less permanently keep each
> adapter
> > > on the lens.
> > >
> > > Comments? Suggestions?
> > >
> > > Paul Franklin Stregevsky
> > >
> > > -
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