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#1487684 - 08/03/10 10:44 PM Who Sells Best Action Center Pins?
Jbyron Offline
Full Member

Registered: 06/17/10
Posts: 482
Loc: USA
So far, I haven't had much luck. Right size printed on package, wrong size center pins. This seems to be the norm.

Where can I get a quality center pin that is actually the size I ordered?
_________________________
Tuner-Technician



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#1487732 - 08/04/10 12:26 AM Re: Who Sells Best Action Center Pins? [Re: Jbyron]
KawaiDon Offline
1000 Post Club Member

Registered: 02/05/02
Posts: 1206
Loc: Orange County, CA
Byron,

I have had that happen, but only one time. I buy a lot of center pins, and they are almost always correct.

I like Schaff and Pianotek.

Don Mannino

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#1487947 - 08/04/10 10:59 AM Re: Who Sells Best Action Center Pins? [Re: KawaiDon]
Dale Fox Online   content
1000 Post Club Member

Registered: 10/17/04
Posts: 1054
Loc: Nor California Sacramento area
Byron, you may have an issue with your measurement device. You aren't by chance using calipers to make your center pin measurements, are you? If so try investing in a decent quality micrometer, something accurate to .0001" and then learn how to properly use it and read it.
_________________________
Dale Fox
Registered Piano Technician
Remanufacturing/Rebuilding

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#1487973 - 08/04/10 11:35 AM Re: Who Sells Best Action Center Pins? [Re: Dale Fox]
Olek Offline
6000 Post Club Member

Registered: 03/14/08
Posts: 6369
Loc: France
Even if som size make me wonder if imperials or metrics are used, (for instance 1.325 is generally 1320) the consistency is very good afterthat

With a micrometer (palmer) or even a wire gauge. (v shape)
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

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#1488293 - 08/04/10 08:51 PM Re: Who Sells Best Action Center Pins? [Re: Dale Fox]
Jbyron Offline
Full Member

Registered: 06/17/10
Posts: 482
Loc: USA
Originally Posted By: Dale Fox
Byron, you may have an issue with your measurement device. You aren't by chance using calipers to make your center pin measurements, are you? If so try investing in a decent quality micrometer, something accurate to .0001" and then learn how to properly use it and read it.


No, I have two micrometers, one digital and one regular. They both gave the same readings. Another technician verified also. I sent the first ones back to one place and they confirmed that they were wrong. I haven't sent the others back.

I know to subtract 10 from the reading and divide by two.
In one of the bags, the pins that were supposed to be 1 1/2 sizes up were actually smaller. This happened to me three years ago and again this week! Go figure.

I'm sure they'll help me sort it out.
_________________________
Tuner-Technician



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#1488496 - 08/05/10 07:03 AM Re: Who Sells Best Action Center Pins? [Re: Jbyron]
Mark R. Offline
1000 Post Club Member

Registered: 07/31/09
Posts: 1866
Loc: Pretoria, South Africa
Originally Posted By: ByronEnsign
I know to subtract 10 from the reading and divide by two.


Can you explain this some more, please?

I measured the centers on my Ibach last night, with two micrometers. The imperial one (accuracy 0.001") read 51.3 thou and the metric one (accuracy 0.01 mm) read 1.303 mm (in both cases, I estimated the last digit), so they corresponded very well, presumably to a 1.3 mm center.

From which number should I subtract 10, divide by 2, and what does the resulting number mean? Pin size for the supplier?
_________________________
Autodidact interested in piano technology.

1922 49" Zimmermann, project piano.
1970 44" Ibach, daily music maker.

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#1488599 - 08/05/10 10:32 AM Re: Who Sells Best Action Center Pins? [Re: Mark R.]
Dale Fox Online   content
1000 Post Club Member

Registered: 10/17/04
Posts: 1054
Loc: Nor California Sacramento area
In the US system of sizing a number 20 pin is .050". ie (50-10)/2=20 or
(49-10)/2= 19 1/2
_________________________
Dale Fox
Registered Piano Technician
Remanufacturing/Rebuilding

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#1488683 - 08/05/10 12:48 PM Re: Who Sells Best Action Center Pins? [Re: Dale Fox]
Olek Offline
6000 Post Club Member

Registered: 03/14/08
Posts: 6369
Loc: France
Are not WNG advertise about the superior quality of their center pins?
Is there something new ? any feedback ?
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

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#1488685 - 08/05/10 12:49 PM Re: Who Sells Best Action Center Pins? [Re: Dale Fox]
Larry Buck Offline
2000 Post Club Member

Registered: 10/27/04
Posts: 2313
Loc: Lowell MA
It is good practice to measure all pins no matter where you get them from.

I check a few before I put them into the cup.

I check each one that I replace and each one that replaces it.

If what you are doing is to be considered "close tolerance" , then it is a necessary part.

I have several "mics" I prefer the barrel Starrett. Easy and quick, reliable.
Keep everything organized on the bench in good order and rehearse that process .."Pics and Puts" I think it is called.
_________________________
Has Anyone Seen My Glasses ?

E. J. Buck & Sons
Lowell MA 01852
978 458 8688
www.ejbuckpiano.com
www.finepianodevelopment.com

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#1488697 - 08/05/10 01:06 PM Re: Who Sells Best Action Center Pins? [Re: Larry Buck]
Larry Buck Offline
2000 Post Club Member

Registered: 10/27/04
Posts: 2313
Loc: Lowell MA
Oleg,

WNG is using needle bearings for their center pins. They are manufactured to much tighter tolerance.

They did tell me that tolerance, I don't remember they number they gave me, right at this moment.
_________________________
Has Anyone Seen My Glasses ?

E. J. Buck & Sons
Lowell MA 01852
978 458 8688
www.ejbuckpiano.com
www.finepianodevelopment.com

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#1488817 - 08/05/10 04:09 PM Re: Who Sells Best Action Center Pins? [Re: Larry Buck]
Roger L Offline
Junior Member

Registered: 04/28/10
Posts: 18
Funny - I have been told that SIZE DOES NOT MATTER!

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#1488918 - 08/05/10 06:58 PM Re: Who Sells Best Action Center Pins? [Re: Larry Buck]
Olek Offline
6000 Post Club Member

Registered: 03/14/08
Posts: 6369
Loc: France
Wew ! needle bearing ! the surface treatment may be something !

Of course everything is miked, as you state. That say the consistency is generally high with the cut centers, I cant have "strong" or less strong, for instance. but miking remains as part of process.
A mike stand can be useful too. to mike tuning pins it goes way faster.


Edited by Kamin (08/05/10 06:59 PM)
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

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#1488942 - 08/05/10 07:36 PM Re: Who Sells Best Action Center Pins? [Re: Larry Buck]
Dale Fox Online   content
1000 Post Club Member

Registered: 10/17/04
Posts: 1054
Loc: Nor California Sacramento area
The WNG pins for their composite parts (needle bearings) come in two lengths and 5 or 6 diameters. One length for hammer and whip centers, the other for rep and jack centers (Shorter). Sizes start at .0500" and work up in increments of .0002". Not meant to be used for cloth center bushings and not soft enough to cut anyhow.

They also sell german silver (solid,no plating) regular pins (longer and pointed, can be cut to length) for other types of centers. See their web site for further info.
_________________________
Dale Fox
Registered Piano Technician
Remanufacturing/Rebuilding

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#1488951 - 08/05/10 07:51 PM Re: Who Sells Best Action Center Pins? [Re: Dale Fox]
Olek Offline
6000 Post Club Member

Registered: 03/14/08
Posts: 6369
Loc: France
Thanks Dale, I guess the one I use are surface treated (German silver core too) While I am unsure.
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

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