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

[David Ilvedson]

I would seem the idea was to keep the center from walking, even if it was too small for the birdseye.   Mark, do you find the Renner centers are in between our center sizes?   I'm consistently finding tight on one side and loose or Ok on the other...
David Ilvedson, RPT
Pacifica, CA 94044

Original message
From: "Mark Cramer" 
To: caut at ptg.org
Received: 4/8/2009 6:02:07 PM
Subject: Re: [CAUT] Fwd: Does V S Profelt work in reverse?

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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