You might possibly find such bolts at Ace Hardware of one of the big box stores. I was surprised to see the selection of bolts at Ace the other day, not on the shelves or hanging in bags, but in the specialty fastener drawers. If you already looked there, then I'm wrong. Next time I'm there, I'm going to check it again.
Paul McCloud
San Diego
Hello all,
My customer has a Hobart Cable grand piano made in China. The movers lost the lyre bolts. They are the same thread as the leg bolts but different lengths. I measured the leg bolts and they are: M12 2.0 That is, they are 12.5mm thread diameter and a 2mm thread pitch. That does not match known fastener standards. A 12mm should have a 1.75 pitch and a 14mm has a 2mm pitch. The company making the piano is out of business as far as I could find. The question is, has anyone else encountered this problem and where could I find a replacement? They are the bolts that have the hex head. I have wondered if a custom 3D printed bolt would work if made of a hard plastic. Many thanks!
Cary
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Cary Thrift
Marietta GA
770-517-9871
Original Message:
Sent: 3/21/2021 12:20:00 PM
From: Roger Gable
Subject: RE: Missing lyre bolts
Cary,
No,no,no don't tap new threads over a different thread profile. You will get an extended cross threading that will fail after several on-and-off applications.
These "strange" threads are unique to the Asian piano manufacturers. They're British Standard Whitworth threads. You can get replacement bolts from Samick.
Roger
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Roger Gable
Gable Piano
Everett WA
425-252-5000
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Original Message:
Sent: 03-21-2021 08:52
From: Cary Thrift
Subject: Missing lyre bolts
Great idea! Why didn't I think of that?
Thanks! I'll try that and let you know how it turns out.
Cary Thrift Jr
770-517-9871
Original Message:
Sent: 3/21/2021 3:44:00 AM
From: Alexander Brusilovsky
Subject: RE: Missing lyre bolts
Tap M14 *2 in the holes and use M14 bolts.
Alexander Brusilovsky
Original Message:
Sent: 3/20/2021 10:14:00 PM
From: Cary Thrift
Subject: Missing lyre bolts
Hello all,
My customer has a Hobart Cable grand piano made in China. The movers lost the lyre bolts. They are the same thread as the leg bolts but different lengths. I measured the leg bolts and they are: M12 2.0 That is, they are 12.5mm thread diameter and a 2mm thread pitch. That does not match known fastener standards. A 12mm should have a 1.75 pitch and a 14mm has a 2mm pitch. The company making the piano is out of business as far as I could find. The question is, has anyone else encountered this problem and where could I find a replacement? They are the bolts that have the hex head. I have wondered if a custom 3D printed bolt would work if made of a hard plastic. Many thanks!
Cary
------------------------------
Cary Thrift
Marietta GA
770-517-9871
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