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What size hex wrench for US Professional tuners?

tpaul

Supporting Member
Mar 19, 2011
4,671
10,323
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The title pretty much says it. I want to adjust the tension on my 2016 US Professional Precision tuning machines. I've tried every small hex wrench I own, nothing fits. I read online that it takes a 2mm wrench, ordered a mm set, nope, doesn't fit. I read some Fender specs that said it takes a 7/64" wrench, ordered one of those, not even close.

Does anyone have the right number? I can't be the only person who's ever wanted to adjust tuner tension on an Am. Pro.

Thanks!
 
The title pretty much says it. I want to adjust the tension on my 2016 US Professional Precision tuning machines. I've tried every small hex wrench I own, nothing fits. I read online that it takes a 2mm wrench, ordered a mm set, nope, doesn't fit. I read some Fender specs that said it takes a 7/64" wrench, ordered one of those, not even close.

Does anyone have the right number? I can't be the only person who's ever wanted to adjust tuner tension on an Am. Pro.

Thanks!
What's too big / too small in the metric kit? We'll figure it out.

Riis
 
What's too big / too small in the metric kit? We'll figure it out.

Riis

2.5 mm is too big. 2 mm fits just a little loosely. I don't know, maybe some previous owner did strip them a bit.

What seems crazy to me is the trial and error approach to something that should be easy to find out. It's an adjustment screw. Surely the size should be listed in the instrument specs?
 
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2.5 mm is too big. 2 mm fits just a little loosely. I don't know, maybe some previous owner did strip them a bit.

What seems crazy to me is the trial and error approach to something that should be easy to find out. It's an adjustment screw. Surely the size should be listed in the instrument specs?

Okay, I love a challenge. I found a 2.35mm / 3/32" hex key in my cast-off bin. Want it?

Riis