Welcome to the Piano World Piano Forums
Over 2 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Gifts and supplies for the musician
SEARCH
the Forums & Piano World

This custom search works much better than the built in one and allows searching older posts.
(ad) Yamaha CP4 Rebate
Yamaha CP4 Rebate
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
(ad) Pianoteq
(ad) Pearl River
Pearl River Pianos
(ad) P B Guide
Acoustic & Digital Piano Guide
Who's Online
143 registered (accordeur, aesop, 36251, Alux, anamnesis, 37 invisible), 1345 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Quick Links to Useful Piano & Music Resources
Our Classified Ads
Find Piano Professionals-

*Piano Dealers - Piano Stores
*Piano Tuners
*Piano Teachers
*Piano Movers
*Piano Restorations
*Piano Manufacturers
*Organs

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano & Music Accessories
*Music School Listings
* Buying a Piano
*Buying A Acoustic Piano
*Buying a Digital Piano
*Pianos for Sale
*Sell Your Piano
*How Old is My Piano?
*Piano Books
*Piano Art, Pictures, & Posters
*Directory/Site Map
*Contest
*Links
*Virtual Piano
*Music Word Search
*Piano Screen Saver
*Piano Videos
*Virtual Piano Chords
(ad) Estonia Piano
Estonia Pianos
Topic Options
#2099084 - 06/09/13 01:25 AM Defective upright piano pin
Maximillyan Offline
1000 Post Club Member

Registered: 06/12/11
Posts: 1605
Loc: KZ

In rare cases, the piano factory can install defective pins. There are burr on the invisible of part pin which placed in a pinblock. It's was the reason that in the piano name "Prelude" 1967 a sound loose pitch below required standard. When you tuning through the short term it's not let get right tone and sounded phony. So what happened?

The thing is that the manufacture in the factory a piano tuner technicianed it's . The hammering 'our' pin to the desired height, there was a partial destruction of the wooden bush and hole of pinblock. There are an unexpected grooves or anything so. The friction force between breaking down wooden part and pin was loose. As a result no necessary payload for pin . My advice is that if you decide that one of the pins does loose, and decided to set a cardboard shim, make sure the pin has a similar defect. Otherwise you run the risk of setting the shim under the pin again not achieve the desired result.
_________________________
A=440
http://www.donguluk.ucoz.ru/

Top
(ad PTG 757) The Value of PTG Membership
The Value of a PTG Membership
#2099386 - 06/09/13 03:59 PM Re: Defective upright piano pin [Re: Maximillyan]
bkw58 Offline

Silver Supporter until December 19, 2014


Registered: 03/14/09
Posts: 1913
Loc: Conway, AR USA
Hi Max:
A few questions, please.
1. Is 'Kemble' or 'Yamaha' indicated anywhere on the harp or fallboard? Is there a serial number?
2. Are the burrs visible to you? If not, then how did you test for presence of these?

Thanks,


Edited by bkw58 (06/09/13 04:23 PM)
Edit Reason: clarity
_________________________
Bob W.
Retired piano technician
www.pianotechno.blogspot.com

Top
#2100091 - 06/10/13 04:34 AM Re: Defective upright piano pin [Re: bkw58]
Maximillyan Offline
1000 Post Club Member

Registered: 06/12/11
Posts: 1605
Loc: KZ
Originally Posted By: bkw58
Hi Max:
A few questions, please.
1. Is 'Kemble' or 'Yamaha' indicated anywhere on the harp or fallboard? Is there a serial number?
2. Are the burrs visible to you? If not, then how did you test for presence of these?

Thanks,


Hi,Bob

1.I'm never seen alive 'Kemble'
'Yamaha' on the harp (right) where hight sound. But I seen a serial number only grand.
or fallboard. I don't know.



2. That's the dog is buried. We are unfortunately not only did not see it, but do not know about the existence of such a burr on body of a pin. In the video is a burr on the end of a pin.
Even when it is press-fitted in the factory it's partly ruined wooden surface bush and holes of pinblock .
I found this pin only because the lady owner of the piano, she called a week later after my visit. She said: "You spoiled my piano. One key gives disgusting sound!"
I came in and made sure she was right. I corrected it, apologized for the inconvenience caused and would like walk to my home. As at the time when the lady start play but the string "screeched." It was the same pin.
I realized that the problem in this pin. I would have to put 3 mm. shim of cardboard, when carefully examined the pin and saw a burr on it's body. Then I decided to first put the cardboard shim.4, 5 mm. I left the pin on memory, but I'd instead set a new pin here. The piano works well for more than seven years. Corrugated cardboard works wonders " in golden hands" if solution of the problem is repair of ill wooden hole. I actually restored the hole which was spoiled groove from defective pin.
Here's a song-tale.
Good luck!
Regards, Max
_________________________
A=440
http://www.donguluk.ucoz.ru/

Top
#2100191 - 06/10/13 09:42 AM Re: Defective upright piano pin [Re: Maximillyan]
bkw58 Offline

Silver Supporter until December 19, 2014


Registered: 03/14/09
Posts: 1913
Loc: Conway, AR USA
Thanks, Max.
_________________________
Bob W.
Retired piano technician
www.pianotechno.blogspot.com

Top
#2100704 - 06/11/13 12:21 AM Re: Defective upright piano pin [Re: bkw58]
Maximillyan Offline
1000 Post Club Member

Registered: 06/12/11
Posts: 1605
Loc: KZ
Originally Posted By: bkw58
Thanks, Max.

Thank you, Bob
This shooted video with one single goal. If there are faulty pin of piano as "our" with the burr, you should carefully check each before an installation. Otherwise we have the risk lose of produce quality when we makes installation of pins. We can have a negative result within a short period of time.
Be careful when testing installed pins. And the piano will work flawlessly.


Edited by Maximillyan (06/11/13 12:24 AM)
_________________________
A=440
http://www.donguluk.ucoz.ru/

Top

Moderator:  Piano World 
What's Hot!!
The February 2015 Issue of our Free Piano News Newsletter is out now! FREE Piano Newsletter
--------------------
The best thing I've learned on Piano World....
-------------------
Posting Pictures on the Forums
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

The world's most popular piano web site.
-------------------
PIANO BOOKS
(ad) Jazz Piano Online
Jazz Piano Online Lessons
Ad (Seiler/Knabe)
Seiler Pianos
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
(ad) Lindeblad Piano
Lindeblad Piano Restoration
New Topics - Multiple Forums
pianodisc?
by JustHarmony
46 minutes 14 seconds ago
Pianodisc, Disklavier...
by JustHarmony
Today at 09:49 PM
What should you use to lubricate Sticking Sustenuto Tabs?
by pianoman9
Today at 08:04 PM
Computer problems. Problems?
by PhilipInChina
Today at 07:06 PM
Full Compass partials picture
by prout
Today at 06:30 PM
Forum Stats
78,392 Registered Members
43 Forums
162,079 Topics
2,379,838 Posts

Most users ever online: 15,252 @ 03/21/10 11:39 PM
Gift Ideas for Music Lovers!
Find the Perfect Gift for the Music Lovers on your List!
Visit our online store today.

Visit our online store for gifts for music lovers

 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
|
Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World | Donate | Link to Us | Classifieds |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | Press Room |


copyright 1997 - 2015 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission