Gauged Nut Slotting Files

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Gauged Nut Slotting Files

Our tempered edge-cut nut files produce round-bottom slots for nuts and saddles. Ensure your strings seat properly in the nut without buzzing!

Each chrome-alloy steel file has twin 4" cutting edges. Among our most popular tools, these professional files help you get the job done quickly and correctly.

What files do I need?
Choose nut slotting files that are the same size or no more that a few thousands larger than your individual string gauges. A smaller file can also be rocked side-to-side to widen a slot to the desired size. For example, you can cut a .043" slot with a .042" file by moving it around a bit.

Tip: Slotting Tune-o-matic style saddles
Nut slotting files work great for metal saddles. Choose your file size as you would when slotting a nut: use the same gauge as the string, or a few thousandths larger. After filing to the desired depth, we suggest polishing the slot with Mitchell's Abrasive Cord to remove file marks and burrs.


Trade Secrets!

Are you supposed to slot Tune-o-matic bridge saddles?

Customers often ask how and why they should put slots in the saddles of their new Tune-o-matic bridge. Erick Coleman provides the answers in this issue of Trade Secrets.

Product Instructions

Making a Nut, Step-by-Step

Dan Erlewine, of Stewart-MacDonald's R&D Team, walks you through making and installing a new nut.

Customer Reviews

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5.0
  • 4.77 average rating from 178 reviews
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5.0

Gauged nut files

By
(Customer's Reviews)


I have ten guitars and love to experiment, i own just about every profile of mini files, they have all been shelved since i got the right tool for the right job. Could've saved allot of heartaches, and now i love showing them off.

4.0

Essential tools, but wear down quickly

By
(Customer's Reviews)


I have made about 5 bone nuts in the past few months. It now takes me only two hours to make one, and another half hour to screw it up. These files are essential and work well. However, I find that the edges wear quickly. So use lesser tools for the rough fit, and save these for the precision finish work.

5.0

The right tool for the job!

By
(Customer's Reviews)


I finally broke down and purchased the guaged files for bass guitar. These things are great! Does a pro job in half the time. There's nothing like the right tool for the job! Thanks Stewart-MacDonald!

5.0

fret files

By
(Customer's Reviews)


I've been using this style fret file from Stew Mac...the whole set for years....can't wear them out....the best.

5.0

Almost too Quick for Comfort!

By
(Customer's Reviews)


These are not your ordinary files. I'm not quite sure what I was expecting when I ordered these. For many years I have become quite accustomed to using bench files and rasps. I was kind of kicking around the idea that maybe these nut files were in some way similar to Swiss cut bench files.Was I surprised!

These are like diamond coated files. They also proved to be quite evenly coated which was also a surprise and real treat because they cut better than typical bench files.

I needed to cut a new bone nut I had installed on my '77 Electra X410. These files cut VERY quickly. Almost too quick for comfort! Probably should put a warning note on them.

Of course, I was well pleased with the finish. Much smoother than I expected. I had a small piece of polishing cloth handy to clean out the string slots and they felt quite smooth as they were so I strung up the guitar and it tunes easily and holds that tune very well.

Stew-Mac has a real winner here. If you don't have any of these files you would do well to start building your set now.

5.0

Nut files

By
(Customer's Reviews)


Great product! Definitely the right tool for the job.

5.0

Good slot cutter

By
(Customer's Reviews)


Love these nut files but in my opinion you also need some of the abrasive cord to smooth out the slots after filing. Also in my opinion, you have to do that with any slotting files. These cut fairly quick so that's a plus.

5.0

Gets the job done

By
(Customer's Reviews)


Pretty good. Pretty....pretty.... pretty good.

4.0

It's a Good Tool.

By
(Customer's Reviews)


These files also is good and really save time,but the end of the edges are flat in small sizes and little bit round at big sizes but have not good grip as the others !

So If they had the end edges perfectly round like a string, i do not have use the old strings to make the round cuts,all kn

5.0

brilliant

By
(Customer's Reviews)


very good product, easy to use and does the job just perfect

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Shown on page 4 of our latest catalog.