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Home : Fretting supplies : Measuring : Understring Radius Gauges

Understring Radius Gauges

Read 150 Reviews   |   Write a Review

Fast, accurate bridge saddle adjustment.
Each of these unique gauges has an accurately radiused arc on both the top and bottom surfaces, and is shaped to fit easily under the strings.

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Understring Radius Gauges

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Item# Description In stock Price Quantity
0353 Set of 9 Yes

0352 17" gauge only Yes

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Use the bottom curvature to determine your fretboard radius, and the matching top curvature becomes a reference for setting string saddle heights for best playability.

Set of 9 now includes new 17" radius for Ibanez guitars!

Find your fretboard radius, and set your bridge saddles to match. They're handy for matching pickup polepiece heights to the arc of the strings, too. Precision laser-cut from .050" stainless steel.

The set of 9 gauges includes:
7-1/4", 9-1/2", 10", 12", 14", 15", 16", 17" and 20" radii.

They'll work for string spreads and fingerboards up to 2-5/8" (66.68mm) wide.

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 Ratings and reviews
Understring Radius Gauges
Understring Radius Gauges
5 out of 5 stars
Based on 150 ratings Write a Review
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Displaying 101 – 110 < 1  ...  10  11  12  ...  15 >
5 8-13-2011
Something I had to have

Being someone who likes to do his own set ups, this little set of gauges makes life so much easier when getting the correct radius on the strings. Highly recommended.

rolfm5  Joshua Tx Read my reviews (5)
5 8-08-2011
Excellent Tool

The Understring Radius Gauges are must have tools for guitar setup.

I also purchased the StewMac String Action Gauge, and the CruzTools GuitarTech Guitar kit, which I found on Amazon. The CruzTool kit has the wrenches needed to adjust neck truss rods, as well as a metal ruler, feeler gauges, and some other setup tools in a nice case.

These tools allowed me to setup my Tele and my Musicman bass so that they play much better!

I also bought the book How to Make Your Electric Guitar Play Great by Dan Erlewine. You can probably setup your guitar without it by using the Web and the instructions that come with the CruzTool kit, but the Erlewine book puts it all in one place, and gives some setup specs and problem solving suggestions as well.

One area that the book was a little weak on was the topic of Neck Angle. After adjusting my bass guitar's truss rod, I still needed to lower the bridge to get the right string height, but the bridge pieces were as low as they could go. So instead I adjusted the neck angle which solved the problem. Luckily, I found some good info on the web about this.

Slip'ry Dan Weisberg  San Jose, CA Read my reviews (6)
5 6-19-2011
Awesome tool

Who would've thought that a simple thing like matching the neck radius to the bridge radius would be a major improvement. This little adjustment made my guitar MUCH more playable! Goodbye fret-outs and dead notes! Thanks Stewmac!

Slash671  Guam Read my reviews (29)
5 6-16-2011
Understring Radius Gauges

Very helpful tool in setting up a guitar. Especially on a Strat or Tele. Very quick shipment. is a great place to start collecting tools and getting good information on how to do repairs and stuff. Thanks guys!

Andy A  Cincinnati Read my reviews (2)
5 5-27-2011
Great For Saddle Tops

This is a good tool to find the top radius on your saddles. Just match it to the end of your fretboard. I'd still use a 6" ruler to do individual string height, especially on boards that have been replaned. But this tool is much easier to handle than a radiused sanding block when top profiling a saddle.

Wimsatt Instruments  Nashville, TN Read my reviews (3)
5 5-15-2011

Good tool to own

BIGAL  CANADA Read my reviews (6)
5 5-12-2011

Pretty hard to pass up these beauties from stewmac's inventory. I could make them but why?! when they are right here at a fabulous bargain!

toneage  canada Read my reviews (6)
5 5-11-2011
Under String Guages

These are great!! They are easy to use and make setting string height a breeze. Used them first on my Telecaster and it now plays like a different guitar. My Strat is next.
Thanks Stewart-MacDonald for a great product.

rockn4Christ  St. Clair Shores, Mi
5 5-02-2011
Quick work

Used these on my Strat and three Telecasters and got the correct results quickly. A good quick tool.

TOMMYPLANET  Austin, Tx Read my reviews (3)
Customer supplied image for review
5 4-29-2011
They do the job well

This a handy little product. They are made well and percise from durable steel. These will last a lifetime with minimal care.

MoorMusic  Switzerland Read my reviews (44)
Displaying 101 – 110 < 1  ...  10  11  12  ...  15 > /\ Top of Reviews

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