#1
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Truss rod head between sizes?
Guys, one of my guitars (Brondel) has a truss rod hex head that seems to be between sizes. I don't think it was ever rounded out, as it was only ever adjusted by Laurent or me.
9/64" is too small but it will (dangerously) get the job done. 5/32" is too big. 3.5 mm and 4 mm are also too small and too big, respectively. Seems like either my hex wrench size isn't accurate, the truss rod head is rounded out, or I need a between size. Fortunately, I don't need to tighten it now. I just had to loosen it. But I wouldn't want to tighten that truss rod with a 9/64" for fear that I would round it out. What would one do in this case? Buy a 5/32" and start sanding it down until it fits?
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Circa OM-30/34 (Adi/Mad) | 000-12 (Ger/Maple) | OM-28 (Adi/Brz) | OM-18/21 (Adi/Hog) | OM-42 (Adi/Braz) Fairbanks SJ (Adi/Hog) | Schoenberg/Klepper 000-12c (Adi/Hog) | LeGeyt CLM (Swiss/Amzn) | LeGeyt CLM (Carp/Koa) Brondel A-2 (Carp/Mad) |
#2
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Contact the maker, and verify the correct size. It’s very unlikely to be a non standard size.
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#3
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4 mm. My 4 mm is too big. Weird.
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Circa OM-30/34 (Adi/Mad) | 000-12 (Ger/Maple) | OM-28 (Adi/Brz) | OM-18/21 (Adi/Hog) | OM-42 (Adi/Braz) Fairbanks SJ (Adi/Hog) | Schoenberg/Klepper 000-12c (Adi/Hog) | LeGeyt CLM (Swiss/Amzn) | LeGeyt CLM (Carp/Koa) Brondel A-2 (Carp/Mad) |
#4
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It isn’t uncommon on some inexpensive Allen keys to have a burr on the end of the key, making the key just too large. Sometimes just knocking the burr off with a file is all that is needed.
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#5
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I have a few sizes of these gripper wrenches. They are tapered on the end and designed for worn allen nuts.
https://www.stewmac.com/Luthier_Tool..._Wrenches.html
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Bryan |
#6
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Quote:
Quote:
__________________
Circa OM-30/34 (Adi/Mad) | 000-12 (Ger/Maple) | OM-28 (Adi/Brz) | OM-18/21 (Adi/Hog) | OM-42 (Adi/Braz) Fairbanks SJ (Adi/Hog) | Schoenberg/Klepper 000-12c (Adi/Hog) | LeGeyt CLM (Swiss/Amzn) | LeGeyt CLM (Carp/Koa) Brondel A-2 (Carp/Mad) |
#7
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I think they are called "socket head" allen wrenches. Try one of those.
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