JBM27 owners? - Jemsite
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post #1 of 28 (permalink) Old 11-02-2018, 03:24 PM Thread Starter
 
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JBM27 owners?

I recently got a JBM27 and the locking nut was way too high. Measurement at the first fret was almost a full millimeter after trying to get a good overall action setup with an almost totally flat neck. And the neck sat in the pocket a little crooked.

Anyone else have issues with theirs? Just ordered an exchange, so hopefully this one wonít be a dud. Otherwise, nice axe!
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post #2 of 28 (permalink) Old 11-02-2018, 03:39 PM
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Re: JBM27 owners?

I've been toying with the idea for ages, but haven't actually gone through with it yet. sorry to hear yours wasn't as good as it should have been.
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post #3 of 28 (permalink) Old 11-02-2018, 03:43 PM
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Re: JBM27 owners?

You are typically going to find these barless nuts far too high, I can't remember the last time I didn't have to grind one considerably to get the first fret action right. You may get one a little lower but I don't think you're going to get one that I'd consider "good".
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post #4 of 28 (permalink) Old 11-02-2018, 09:09 PM
 
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I've always found the nuts are too high out of the factory. A couple times I found shims under them, removed them & voila proper nut height.
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post #5 of 28 (permalink) Old 11-02-2018, 11:58 PM Thread Starter
 
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Re: JBM27 owners?

No shims on this one, unfortunately. I think Iím gonna cancel the exchange and go with a non-trem 7 string.
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post #6 of 28 (permalink) Old 11-03-2018, 01:18 PM Thread Starter
 
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Re: JBM27 owners?

If anyone has one that had a playable nut height I might be interested in trying another. Otherwise, might try an RGDIR7M even though that blue finish isnít my cup of tea.

Though, I guess I could file the base of the locking nut.
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post #7 of 28 (permalink) Old 11-03-2018, 01:35 PM
 
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Of all the Ibanez I've owned, locking nut height was the only real issue I've ever had. Easy fix though.
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post #8 of 28 (permalink) Old 11-03-2018, 04:23 PM Thread Starter
 
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Re: JBM27 owners?

Do they offer replacements in different heights?

Also, is it easy to file down the base of a locking nut?
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post #9 of 28 (permalink) Old 11-03-2018, 04:39 PM
 
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Don't file it, use abrasive paper laid on a flat surface, keep taking meat off it until it's the right height.
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post #10 of 28 (permalink) Old 11-03-2018, 05:02 PM
 
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Here's my method for correcting a high locking nut. Leave the strings attached. Loosen them enough so you can slide the nut in & out. Sand the bottom on a flat surface. When you think you have the height correct, slide it back in retune & check it. You don't need to refasten as yo you check, strings will hold it in place. Repeat as necessary. Remember to clean it off every time you sand, to get accurate measurements & to ensure you don't get stray metal into your pup magnets.
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post #11 of 28 (permalink) Old 11-03-2018, 05:39 PM
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Re: JBM27 owners?

Off the nut, grinder, unless you have a couple hours to sand metal. If you're sanding take it off the nut rout with 100, carefully and using a true flat anything to keep the rout true. But taking .6/.7mm off a locking nut is a job for a grinder. And you must relieve the treble edge with a file or as soon as you burn thru the cosmo with will start lifting off the treble side [or bass side, depending on which way you hold the nut on the grinder].
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post #12 of 28 (permalink) Old 11-03-2018, 05:51 PM
 
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I suspect most guitar owners don't have grinder, which is what I normally use. I use the side of the wheel as it is smoother. Flat sandpaper may be all some have to work with.
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post #13 of 28 (permalink) Old 11-03-2018, 05:59 PM
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Re: JBM27 owners?

Most guitar owner should know somebody that has a grinder. You don't need an awesome tool chest, you just need to know somebody else that has the basics
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post #14 of 28 (permalink) Old 11-03-2018, 05:59 PM Thread Starter
 
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Re: JBM27 owners?

Thanks for the tips!

The height on the one I returned was around .036Ē on the low E at first fret, which was way too high for me. Iím guessing Iíd want around .023Ē? Hopefully if I get another it will be fine or at least better. I didnít think the treble side was too bad, but didnít take a measurement to be sure.

I have a fret sander that I made from a straightedge and planed piece of poplar to lightly take down rough fret ends, and metal files as well.
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post #15 of 28 (permalink) Old 11-12-2018, 07:27 PM
 
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Re: JBM27 owners?

Get some double stick sandpaper and attach it to a flat surface. Then slowly sand off material until the nut is the right height. If one side needs it more than the other, you can sand unevenly by placing more pressure on one side.

You could also file down the nut seat in the neck or try to file down the nut slots themselves, but I think the first option is the easiest.
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