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

the Forums & Piano World

Trying Something New with Search
Pearl River
Pearl River Pianos
(ad) Pianoteq
(ad) Lindeblad Piano
Lindeblad Piano Restoration
(ad) P B Guide
Acoustic & Digital Piano Guide
Who's Online
91 registered (anamnesis, accordeur, augustm, 36251, alwatson, 27 invisible), 896 Guests and 3 Spiders online.
Key: Admin, Global Mod, Mod
(ad) Estonia Piano
Estonia Pianos
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

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano & Music Accessories
*Live Piano Venues
*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
*Virtual Piano
*Music Word Search
*Piano Screen Saver
*Piano Videos
*Virtual Piano Chords
Topic Options
#2131401 - 08/11/13 08:32 PM JB weld to fix a pedal?
Hans747 Offline
Junior Member

Registered: 02/09/13
Posts: 10
Hi folks,

I have a Schubert piano from the the 1890s. Unfortunately, we snapped one of the cast iron pedals while moving it. No welder in town wants to touch cast iron, and I can't find anyone to braze it.

I was thinking about doing a redneck repair: JB Weld!

The backside (bottom side actually) of the pedal is hollow, so I was thinking about JB welding the pedal back together and then putting a piece of steel rod inside the hollow part held in with JB weld, of course, for extra rigidity.

Has anyone attempted this before? Is this even worth my time?

I can't find any replacement pedals online, so I feel like this is my only option for an inexpensive repair.

Piano & Music Accessories
piano accessories music gifts tuning and moving equipment
#2131407 - 08/11/13 08:48 PM Re: JB weld to fix a pedal? [Re: Hans747]
TheKeysAssassin Offline
Full Member

Registered: 09/16/12
Posts: 126
Loc: Kansas City, MO
I did a little internet research, and people use jb weld to glue cast iron together. Heck, one guy did it to his Winnebago's engine block. Also, glue a steel rod to the underside of all of the pedals, just as a preventive measure. I sure hope I'm not steering you wrong!

Dudes engine block

PS. Take a wire brush to the points to where you are gluing, and get them clean.

Edited by TecFlip (08/11/13 08:52 PM)
-Nathon Lee
YouTube Channel - http://www.youtube.com/user/JleewSongs
Yamaha P-35b

#2131426 - 08/11/13 09:55 PM Re: JB weld to fix a pedal? [Re: Hans747]
Blues beater Online   content
Full Member

Registered: 01/04/13
Posts: 211
Loc: Austin, Texas USA
JB "Weld" is an example of triumph of misleading marketing. A properly descriptive term would be JB "Expoy." It has a small fraction of the strength of cast iron. As with any overly hyped and skillfully marketed product there are lots of (dubious) testimonials.

The advertised tensile strength of JB Expoy (likely overstated by the same folks who successfully mislead the public to associate this glue with "welding") is about 20% that of cast iron.



I am only a DIYer when it comes to pianos and overwhelmed by detailed discussions about temperaments etc., but I am in my element here as a several decades vehicle repair shop owner and a dirt track stock car builder/racer/maintainer for 13 years.

All the above said, if you don't anticipate the pedal ever again being stressed in any way approaching the event that broke it, and if you add reinforcement it might work. A skilled properly equipped welder can weld cast iron. There are those who do it regularly.

Don, playing the blues in Austin, Texas on a 48" family heirloom Steinway upright, 100 year old 54" Weber upright, unknown make turn of the century 54" upright -- says "Whittier NY" on the plate, Starr, ca. 100 years old full size upright.

#2131443 - 08/11/13 10:31 PM Re: JB weld to fix a pedal? [Re: Hans747]
BDB Offline
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 23772
Loc: Oakland
It may be cheaper and easier to replace all of the pedals than to repair one of them.
Semipro Tech

(ad 568) PTG Convention Norfolk
PTG Convention Norfolk
#2131667 - 08/12/13 10:39 AM Re: JB weld to fix a pedal? [Re: Hans747]
Steve Jackson Offline
500 Post Club Member

Registered: 03/02/07
Posts: 704
Loc: Zichron Yaacov, Israel
JB Weld will last about 10 minutes on this job
International sales of vintage Piano and restoration.
Exclusive Live Performance Player Systems Dealer


#2131780 - 08/12/13 01:11 PM Re: JB weld to fix a pedal? [Re: Hans747]
Emmery Offline
2000 Post Club Member

Registered: 04/02/08
Posts: 2481
Loc: Niagara Region, On. Canada
I would agree with the others here in regards to welding vs epoxy vs strength of cast iron, with one exception....

Some pedals were designed incredibly poorly with the original casting. Sharp corners, weak transitions to stress points and excessively large holes in them for the trap linkages (this last one is a common place problem in some pedals and they tend to crack on the thin remaining sides aroune the holes).

That said, I have fixed a few pedals without issue using Devcon 10110 because of time/travel constraints. It has an adhesive tensile shear of 2800 lbs, compressive strenght of 8260 psi, and 5600 psi flexural strength and is the ideal choice IMHO.

The important thing is that reinforcing steel needs to be used (threaded rod) and the epoxy needs to be keyed into the surface with a dremel and carbide burr. The keying needs to be done in a way that you further don't weaken the original metal in new places.

It can be done, but this is not a job where you simply lay in some steel and gop epoxy all over the place...you have to be fairly clever about it.

Edited by Emmery (08/12/13 01:12 PM)
Piano Technician
George Brown College /85
Niagara Region

#2132072 - 08/12/13 11:48 PM Re: JB weld to fix a pedal? [Re: Hans747]
Nash. Piano Rescue Offline
Full Member

Registered: 12/08/09
Posts: 389
Loc: East Nashville,TN Scottsville...
Cast iron pedal failures can be mig or tig welded. I find it hard to believe welders out there are still scared to perform this task. Cast iron has issues with temperature shock so tiny tack welds are used then back filled and ground smooth. About a 30 dollar repair.

Google muggy weld and watch the numerous videos on welding cast iron parts deemed junk by the " world is still flat club"
J. Christie
Nashville Piano Rescue
East Nashville
Bowling Green, KY
Scottsville KY.
Chamber of Commerce

Putting inspiration in the hands of area musicians
Through restoration/renovation

#2132185 - 08/13/13 09:21 AM Re: JB weld to fix a pedal? [Re: Hans747]
TimR Offline
3000 Post Club Member

Registered: 08/17/04
Posts: 3637
Loc: Virginia, USA
I've done some redneck repairs with JBWeld very successfully.

You need to take care with surface preparation and alignment. Clean it very well, degrease with mineral spirits and alcohol, build a jig of some sort that would hold it while it sets, don't move it too early, etc.

In a case like this I'd pay to weld it. But, if JBWeld is really 20% as strong, and you have a hollow back, you can probably make the strength up by making it 5 times as thick.

I would do it in steps. First glue the repair, then stitch across with several rods (nails might work), then a thicker layer across that.

If it doesn't hold, use the old one to make a mold and cast a new one out of aluminum or whatever the local shop likes.

Or, use one of the old ones as a plug, do wet layup fiberglas over it to make a female mold, then layup fiberglas inside the mold for a perfect replica. Lots of ways to solve this one.
gotta go practice

#2132194 - 08/13/13 09:42 AM Re: JB weld to fix a pedal? [Re: Hans747]
TimR Offline
3000 Post Club Member

Registered: 08/17/04
Posts: 3637
Loc: Virginia, USA
carve one out of wood.

Get some quality plywood, Baltic birch would work; clamp it in a vice, use a coping saw to get close, a four way rasp to shape, some sandpaper.
gotta go practice

#2132196 - 08/13/13 09:53 AM Re: JB weld to fix a pedal? [Re: Hans747]
anrpiano Offline
Full Member

Registered: 05/05/04
Posts: 189
Loc: Chicago
I have torn down many dozens of old pianos. If the pedals are salvageable I usually save them for just such an occasion. Why don't you post a picture, maybe a pac-rat like me or someone else may have just what you need.
Andrew Remillard
Downers Grove, IL 60515

#2132298 - 08/13/13 01:59 PM Re: JB weld to fix a pedal? [Re: Hans747]
Hans747 Offline
Junior Member

Registered: 02/09/13
Posts: 10
Here are some pics:

#2132359 - 08/13/13 03:27 PM Re: JB weld to fix a pedal? [Re: Hans747]
Hans747 Offline
Junior Member

Registered: 02/09/13
Posts: 10
If you look closely at the bottom pic, you will see the crack right next to the spot where the gold paint ends.

So far, after an hour and a half of calling, I've found two people who are willing to weld it. One is not cheap, and the other will not quote me a price till I bring it to his shop which is 1.5 hours round trip. I'm already looking at selling this piano at a loss, so this stings even more!

Edited by Hans747 (08/13/13 06:28 PM)

#2132435 - 08/13/13 06:27 PM Re: JB weld to fix a pedal? [Re: Hans747]
Hans747 Offline
Junior Member

Registered: 02/09/13
Posts: 10
Any suggestions on where I could find a replacement would be much appreciated.

#2132463 - 08/13/13 07:59 PM Re: JB weld to fix a pedal? [Re: Hans747]
BDB Offline
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 23772
Loc: Oakland
Schaff 1576 for brass, 1578 for nickel. You may need to adjust the mounts, but they should be a reasonable match. Replace all three pedals.
Semipro Tech


Moderator:  Piano World 
What's Hot!!
Why It's Impossible to Tune a Piano!
aka, why you should be nice to your tuner.
Posting Pictures on the Forums
Forums Rules & Help
on Piano World

Piano Classified Ads
Piano Acc. & Gift Items in
Piano World's Online Store
In PianoSupplies.com ,(a division of Piano World) our online store for piano and music gifts and accessories, party goods, tuning equipment, piano moving equipment, benches, lamps Caster Cups and more.

Free Shipping on Jansen Artist Piano Benches
Hammond A100 for Sale!
(Think B3)
Hammond A100 for sale!
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
(ad 125)
Sweetwater $55,000 Giveaway
Sweetwater $55,000 Mic Locker Giveaway
New Topics - Multiple Forums
Problem of Kawai mp11
by Knario
Today at 05:07 AM
Yamaha Montage
by Bachus
Today at 03:49 AM
Pianist singer or duo required.
by Anthony Johns
Today at 03:40 AM
by SiFi
Today at 01:05 AM
Zeitter and Winkelmann appraisal
by sol123
Yesterday at 10:16 PM
Forum Stats
83,787 Registered Members
44 Forums
172,980 Topics
2,528,488 Posts

Most users ever online: 15,252 @ 03/21/10 11:39 PM
Sheet Music Plus (125)
Sheet Music Plus Featured Sale

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 - 2016 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission