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#2027375 - 02/05/13 11:13 AM Hitch Pin Replacement
M.O.P. Offline
500 Post Club Member

Registered: 03/14/09
Posts: 995
Loc: Ocala, Florida
Our tech is in the midst of a restoration on a Steinway M. Not a typical restoration, high level, show quality finish on the plate, etc.

Does anyone have any experience/procedures/tips/interference tolerances on removing and replacing all hitch pins (including blind hole hitch pins in base) on the plate? The old pins will be replaced with new chrome plated hitch pins, i.e., those supplied from Piano Tek. NOTE: The old hitch pins are perfectly fine, this change is being done purely for cosmetic reasons.

Thanks!
_________________________
Nancy Fanzlaw
Seamstress for the Band

www.FortePianoGallery.com
Forte' Blog - Technical Tuesdays
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"The piano was God's gift to music." Lou Mason


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#2027389 - 02/05/13 11:29 AM Re: Hitch Pin Replacement [Re: M.O.P.]
BDB Offline
Yikes! 10000 Post Club Member

Registered: 06/07/03
Posts: 24029
Loc: Oakland
Heat would help. If your tech does not feel comfortable doing it, I would suggest bringing in a machinist.
_________________________
Semipro Tech

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#2027391 - 02/05/13 11:31 AM Re: Hitch Pin Replacement [Re: M.O.P.]
M.O.P. Offline
500 Post Club Member

Registered: 03/14/09
Posts: 995
Loc: Ocala, Florida
Thanks, BDB, I'll pass this along.
_________________________
Nancy Fanzlaw
Seamstress for the Band

www.FortePianoGallery.com
Forte' Blog - Technical Tuesdays
Forte' on Facebook

"The piano was God's gift to music." Lou Mason


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#2027482 - 02/05/13 02:14 PM Re: Hitch Pin Replacement [Re: M.O.P.]
jim ialeggio Offline
500 Post Club Member

Registered: 06/03/05
Posts: 944
Loc: shirley, MA
I routinely replace bass hitches with vertical hitches, especially in short pianos like the M. The vertical hitch pins are either stainless split pins or stainless dowel pins.

Removing the blind hole bass pins never really works very well from above. I shear them off, grind everything flush,redrill the plate, moving the the hole back tangent to the the old pin if room.

I've also redrilled the existing holes if they were straight drilled to start with. In either case, for me, its drilled at the Bridgeport, drilled with 1 bit .10" shy of the final dimension, then reamed with a second pass to the final hole dim.

Just getting the existing pin out can also be done by carefully making a pattern and hand drilling from below, then punching the pin out from below...but your template has to be right on.

The longbridge pins should come out easily by punching out from the underside of the plate...assuming they are through drilled.


Jim Ialeggio
_________________________
Jim Ialeggio
www.grandpianosolutions.com
advanced soundboard and action redesigns
978 425-9026
Shirley Center, MA

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#2027506 - 02/05/13 02:53 PM Re: Hitch Pin Replacement [Re: M.O.P.]
M.O.P. Offline
500 Post Club Member

Registered: 03/14/09
Posts: 995
Loc: Ocala, Florida
Thanks, Jim. I'll pass this suggestion on to our tech.
_________________________
Nancy Fanzlaw
Seamstress for the Band

www.FortePianoGallery.com
Forte' Blog - Technical Tuesdays
Forte' on Facebook

"The piano was God's gift to music." Lou Mason


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#2027517 - 02/05/13 03:13 PM Re: Hitch Pin Replacement [Re: M.O.P.]
Ed Foote Offline
1000 Post Club Member

Registered: 05/03/03
Posts: 1581
Loc: Tennessee
Greetings,
Hmm, for the amount of trouble, effort, and risk being considered for purely cosmetic reasons, it seems like less trouble to polish the pins that are already in there.
Regards,

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#2027623 - 02/05/13 06:31 PM Re: Hitch Pin Replacement [Re: Ed Foote]
kpembrook Offline
1000 Post Club Member

Registered: 04/06/10
Posts: 1510
Loc: Michigan
Originally Posted By: Ed Foote
Greetings,
Hmm, for the amount of trouble, effort, and risk being considered for purely cosmetic reasons, it seems like less trouble to polish the pins that are already in there.
Regards,


Yeah, you can get 'em buffed to a real nice shine . . .
_________________________
Keith Akins, RPT
Editor, Piano Technicians Journal
USA Distributor for Isaac Cadenza hammers and Profundo Bass Strings
Supporting Piano Owners D-I-Y piano tuning and repair

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#2027647 - 02/05/13 07:04 PM Re: Hitch Pin Replacement [Re: jim ialeggio]
kpembrook Offline
1000 Post Club Member

Registered: 04/06/10
Posts: 1510
Loc: Michigan
Originally Posted By: jim ialeggio
I routinely replace bass hitches with vertical hitches, especially in short pianos like the M. The vertical hitch pins are either stainless split pins or stainless dowel pins.

Removing the blind hole bass pins never really works very well from above. I shear them off, grind everything flush,redrill the plate, moving the the hole back tangent to the the old pin if room.

I've also redrilled the existing holes if they were straight drilled to start with. In either case, for me, its drilled at the Bridgeport, drilled with 1 bit .10" shy of the final dimension, then reamed with a second pass to the final hole dim.

Just getting the existing pin out can also be done by carefully making a pattern and hand drilling from below, then punching the pin out from below...but your template has to be right on.

The longbridge pins should come out easily by punching out from the underside of the plate...assuming they are through drilled.
Jim Ialeggio


All good approaches. I would add that they don't always come out real easy. Also, make sure that you are using a high-quality cobalt bit -- probably better than what is available at your friendly local hardware.
_________________________
Keith Akins, RPT
Editor, Piano Technicians Journal
USA Distributor for Isaac Cadenza hammers and Profundo Bass Strings
Supporting Piano Owners D-I-Y piano tuning and repair

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#2027676 - 02/05/13 07:59 PM Re: Hitch Pin Replacement [Re: M.O.P.]
Supply Offline
3000 Post Club Member

Registered: 09/11/06
Posts: 3919
Loc: Vancouver Island, BC, Canada
Originally Posted By: M.O.P.
Our tech is in the midst of a restoration on a Steinway M. ...
I suggest your technician get in touch with colleagues and peers to discuss any questions he may have. PTG and MPT members are usually very helpful with advice. There are other strictly technician forums where the cumulative wealth of knowledge and experience is nothing short of astounding.
_________________________
Jurgen Goering
Piano Forte Supply
www.pianofortesupply.com

Piattino Caster Cups distributor

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