[CAUT] Fwd: Does V S Profelt work in reverse?

[Mark Cramer]

A few years back I did a side-by-side comparison of CLP, Methanol and Wally
Brook's mineral oil/naptha mix.

 

I was hoping to find a calibrated approach to ease those new centers that
are frozen right out-of-the-box, but swing wild the moment you treat them
with anything.

 

Unfortunately, short of meting out a micro-dose, there was no clear winner.
So I decided that to have a long, happy life with a set of action centers,
the safest bet was to treat them with CLP anyhow, and find out what I had
really paid for. Then, re-pin them to the (seasonal) friction I was after. 

 

My feeling is that some manufacturing processes result in an initial
(rotational) friction that is more a result of cloth tension than density.
So, when I take a new flange that won't swing, hit it with some CLP, and
immediately it releases into 20 swings, the picture I have is of a bushing
coiled tightly around the pin, suddenly loosing its grip and releasing like
a coil of piano wire that. oops.

 

I believe Wally once told me that Herberger-Brooks bushed parts were spun on
a long polished pin, against a fixed object, until the cloth was burnished
enough that the part fell off the end of the pin. Even if that method is no
longer in use, I'm wondering if even forcing/twisting in the long pin for
gang-bushing might twist the cloth and impart some tension. (?)

 

Anyhow, while I sit here and ponder all this can anyone explain the
necessity of that ridge/burr at the center of a Renner center-pin? 

 

Do we really need it to keep the pin from walking, or is it a self-destruct
mechanism designed to tear out the bushing, and keep the clever parts
counterfeiters guessing? (and just how long until the clever imitators learn
how to spell RENNER so they can laser it onto their very own dimensionally
correct product! ;>) 

 

Best regards,

Mark Cramer, RPT

Brandon University

 

   

 

 

  _____  

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Tim
Coates
Sent: April 8, 2009 6:22 PM
To: caut at ptg.org
Subject: Re: [CAUT] Fwd: Does V S Profelt work in reverse?

 

Fred,

 

I concur with your findings.  I did the same test you did and obtained the
same results.  I wonder how others are applying the VS Profelt to increase
the friction?

 

Tim Coates

 

  

On Apr 8, 2009, at 11:06 AM, Fred Sturm wrote:





On Apr 6, 2009, at 11:33 AM, DCyr141833 at aol.com wrote:





Also am finding that it works ok on new action part centers that have 0
grams friction - hammer flanges and whippen flanges.

 

            This statement raised my eyebrows a bit, as it certainly doesn't
make sense based on my previous experience. So I tried it this morning on
four hammershanks (Abels). I didn't have any at 0 grams, but all four were
at about 1 gram. I applied a drop to each side. Three hours later, all four
are at 0 grams: the flange flops nicely in the breeze (hold the shank and
swing the flange, and it goes back and forth a couple times). So I would
strongly recommend against this application, myself.

Regards,

Fred Sturm

University of New Mexico

fssturm at unm.edu

 

 

 

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