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!

SEARCH
the Forums & Piano World

This custom search works much better than the built in one and allows searching older posts.
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
(ad) Pearl River
Pearl River Pianos
(ad) Pianoteq
Latest Pianoteq add-on instrument: U4 upright piano
(ad) P B Guide
Acoustic & Digital Piano Guide
PianoSupplies.com (150)
Piano Accessories Music Related Gifts Piano Tuning Equipment Piano Moving Equipment
We now offer Gift Certificates in our online store!
(ad) Estonia Piano
Estonia Piano
Quick Links to Useful Stuff
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 Accessories
* 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
Topic Options
#1986752 - 11/14/12 07:12 PM Why that conical hole under the balance of Steinway grands
Olek Online   content
7000 Post Club Member

Registered: 03/14/08
Posts: 7249
Loc: France

I cannot see the reason, and it seems to develop pulley way faster than if the underside of the key is flat.

I agree that the key have not a precise fulcrum point, it moves on the balance punching, but that conical hole is just adding wear in my opinion.

The German model is adjusted precisely and does not take so much play (pulley) with time.

Some result with the moistening of the wood in the hole with 70% isopropyl (30% water). Not perfect, but a real amelioration (did 3 times on some keys) . the trick is very efficient on Japanese keyboards.
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

Top
(ad PTG 568) Win a Year Journal Subscription
PTG 57th Annual Convention - Atlanta
#1986867 - 11/14/12 10:31 PM Re: Why that conical hole under the balance of Steinway grands [Re: Olek]
Grotriman Offline
500 Post Club Member

Registered: 03/07/04
Posts: 724
Loc: New York City
Is it related to the rounded balance rail used only on the US accelerated actions? Perhaps this is why you don't see it on the Hamburg pianos.
_________________________
Regards,

Grotriman

Top
#1986969 - 11/15/12 06:34 AM Re: Why that conical hole under the balance of Steinway grands [Re: Olek]
Olek Online   content
7000 Post Club Member

Registered: 03/14/08
Posts: 7249
Loc: France
Thank you Grotriman, the instrument is before 1890 and the keyboard does not have the round parts I have seen on the accelerated action.

Even then I don't figure how putting the contact point of the balance pin a few mm above the bottom of the key can help ? The balance makes an oblong path in the hole, due to the conical shape inside of the key I understand the contact can be kept, but why raising the bottom of the hole, I cannot figure.

the hole may be oval then. I want to understand that because if I ream that kind of hole I have to understand what is the effect of the reaming.

On German Steinways (new/recent) I use a modified rat file and work only a small part of the hole, just where the pressure is, not enlarging the other side, That is how the key can stay tight during the stroke.


Edited by Kamin (11/15/12 09:55 AM)
_________________________
Isaac OLEG - http://picasaweb.google.fr/PianoOleg pro

Top

Moderator:  Piano World 
What's Hot!!
Our latest Issue is available now...
Piano News - Interesting & Fun Piano Related Newsletter! (free)
-------------------
HOW TO POST PICTURES on the Piano Forums
-------------------
Sharing is Caring!
About the Buttons
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

The world's most popular piano web site.
(ad) HAILUN Pianos
Hailun Pianos - Click for More
Ad (Seiler/Knabe)
Seiler Pianos
Sheet Music
(PW is an affiliate)
Sheet Music Plus Featured Sale
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
(ad) Lindeblad Piano
Lindeblad Piano Restoration
Who's Online
132 registered (Abby Pianoman, 36251, ajames, accordeur, albumblatter, 36 invisible), 1849 Guests and 20 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
75595 Members
42 Forums
156302 Topics
2295542 Posts

Max Online: 15252 @ 03/21/10 11:39 PM
New Topics - Multiple Forums
Happy Birthday torquenale !!!!
by CarlosCC
Today at 08:26 AM
compositional methods
by Michael Sayers
Today at 08:03 AM
Happy Birthday earlofmar !!!!
by CarlosCC
Today at 04:49 AM
Tight Key ??
by moy71
Today at 01:15 AM
Learning progress
by sunnyday
Today at 01:10 AM
(ads by Google)

Visit our online store for gifts for music lovers

 
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 - 2014 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission