[CAUT] Slipping Beckets

[Jim Busby]

I like it!
JB

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Ed Sutton
Sent: Friday, February 05, 2010 6:22 AM
To: caut at ptg.org
Subject: Re: [CAUT] Slipping Beckets

I have a small pair of flat-jawed pliers, exactly as wide as a tuning pin. I've ground the outer contour of the jaw round, like a tuning pin. With a quick grab of the pliers, I can make a sharp bend for the becket, and also begin to form a curve in the wire that will fit snugly around the pin. Then I put the pin onto the wire, crank it and drive into the pinblock.

This requires a 10 second investment at the start, but the payoff comes comes when tightening the coils and beckets. I've not had any slipping beckets.

Ed Sutton
----- Original Message -----
From: Jim Busby<mailto:jim_busby at byu.edu>
To: caut at ptg.org<mailto:caut at ptg.org>
Sent: Friday, February 05, 2010 7:23 AM
Subject: Re: [CAUT] Slipping Beckets

Hi Ed,

I agree. Hole size isn't the issue as ALL holes are "too big" for #13 wire. I use bare hands for better grip, leave a tiny bit protruding (1/64 or smaller)so that when the coil is formed the becket ends up exactly flush with the TP hole. Most students here that have this slipping becket problem are trying to use a coil maker, or aren't allowing for this "drawing in" of the wire as the sharp bend is made.

Jim Busby

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Ed Foote
Sent: Thursday, February 04, 2010 5:11 PM
To: caut at ptg.org
Subject: Re: [CAUT] Slipping Beckets

Albert wrote"


In most respects I really like Diamond brand tuning pins, especially their consistency in size.  However, since I began restringing pianos with them, I have had to replace anywhere from one to six treble strings per piano because beckets have slipped.  I've never had this happen before, and I'm wondering whether anyone else has had a similar experience.

  I suggest that there is something other than a friction problem.  The only time I have had a becket slip was when I didn't form an acute angle at the bend, or began turning the pin with the becket half-way out. .  I don't see any way a becket can slip out if it is bent sharply at the hole, unless, as Del said, the hole is way too big.  The larger hole allows the exit angle to be less than 90 degrees.  If sharply bent, and laying against the side of the pin when rotation begins, the becket would have to back out against the force of the coil, or the wire would have to flow around the corner.  I have never seen that happen.
Regards,


Ed Foote RPT
http://www.uk-piano.org/edfoote/index.html


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