String Spacing Rule

  • 122 Reviews
  • Write a review

Get accurate string spacing without calipers, calculators or shop rulers.

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String Spacing Rule

Item # 0673
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Quantity: 20


String Spacing Rule

Dan Erlewine shows how to use the String Spacing Rule to quickly locate the strings on a guitar nut. He also explains the problem with using equal spacing.

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Get accurate string spacing without calipers, calculators or shop rulers.

Our laser-etched stainless steel String Spacing Rule quickly finds the right spacing for just about any stringed instrument. It does all the math for you: proportional slot spacing automatically compensates for string diameters, from treble to bass, so the thicker strings won't seem crowded to the player.

The problem is: if you space the strings equally, they don't feel equally spaced. The thicker bass strings seem crowded together. Each gap between strings has to be slightly different to feel right to the player. How do you calculate this? The String Spacing Rule takes care of it, for guitars, basses, mandolins, and banjos.

Fast. The String Spacing Rule is slotted so you can quickly mark the string positions onto the nut. Use a scribe instead of a pencil, and it creates extremely accurate starter grooves for your nut slotting files.

Easy to use. Mark the two outer string positions onto the nut. Slide the rule over the nut to find a set of slots that matches your two marks. Now just scribe or pencil the string positions onto the nut! No measuring, dividing or calculating — the rule does the math for you.

Accurate. The rule's slots are laser-cut in a continuous scale that wraps around both edges of the rule (our thanks to luthier Kevin Ryan for creating this tool). Proportional slot spacing subtly compensates for the diameters of the individual strings, from treble to bass, to give the right feel and playability.

Not just for nut slotting. You can use the String Spacing Rule to notch Tune-o-matic bridge saddles, to lay out bridge pin holes, and when notching archtop guitar, banjo, mandolin and violin bridges.

The String Spacing Rule is made of laser-etched flexible stainless steel that conforms to flat or arched surfaces. Instructions are included.

The String Spacing Rule is included in the Essential Nut Making Tool Kit, which has all the basic tools you'll need for shaping, string-spacing, slotting and fitting string nuts like a pro.

Trade Secrets! Newsletter

Using the String Spacing Rule for guitars and mandolins

Erick Coleman uses Kevin Ryan's proportional string spacing rule for more jobs than Kevin ever expected: 12-strings, mandolins, bridge saddles... Plus: an explanation of the difference between equal spacing and proportional spacing.

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.

Product Instructions

String Spacing Rule Instructions

The String Spacing Rule locates string positions so that heavier strings get the wider spacing they need.

Ratings & Reviews

String Spacing Rule

  • Based on 122 Reviews
Displaying 7 of 13 1 2 3 4 5 6 7 8 9 10 11 12 13
Write a review

Very helpful tool

By JHW from Lexington, KY
(Customer's Reviews) Friday, March 09, 2012

This is a great tool. It makes string spacing pretty easy. Flip it over so it is upside down and it can be used to make left handed nuts too!

String Spacing Rule

By M. Rauchfuss from Germany
(Customer's Reviews) Thursday, March 01, 2012

A great time saving tool. Thanks.

Great Tool!

By Bill0294 from Clearwater, FL
(Customer's Reviews) Thursday, February 02, 2012

I had a Yamaha electric that was missing the nut so I didn't even have a starting template. The spacing rule made the very odd ball-sized guitar nut job painless. Thanks!

A Must Have!

By Randy, Head Guitar Tech CrossTouche from Shelbyville, TN
(Customer's Reviews) Tuesday, January 31, 2012

Hands Down, the best tool I have ever used for marking string spacing. Fast, easy, durable and a real time saver!

Finest Tool For Marking Strings Spacing!

By Kelvin Tay from Singapore
(Customer's Reviews) Friday, January 06, 2012

Wonder how I would be able to do the job untill I came across this tool in! Just completed my first elephant ivory nut for my acoustic guitar! GO GET IT!!!


By Martin Fuerstenau from Unterfoehring
(Customer's Reviews) Friday, January 06, 2012

This is a real timesaver when it comes to nut making. Better than calculating. You can't be wrong with this tool.

makes string spacing a breeze

By Owensby's Custom Woodworks from Northwest Indiana, USA
(Customer's Reviews) Wednesday, December 21, 2011

this ruler makes spacing strings on a new nut a breeze. Provides consistent spacing from the bass side to the treble side.

Essential Tool!

By Wilmer Gingerich from Jamesport MO
(Customer's Reviews) Saturday, December 17, 2011

Great Quality!

String Spacing Ruler

By rnspowell from Kingsville, MD
(Customer's Reviews) Friday, December 02, 2011

A good item when slotting necks, but you need to have the neck nut size that this rule is set up for. Did no good for me this time around but I know it will in the future.

Time Saved = Money Earned

By Joey S. from Escondido, Ca
(Customer's Reviews) Saturday, November 19, 2011

This tool is a no brainer: Easy to use, AMAZING results. And the time you save is money in your pocket. Such an easy to use, and affordable, tool should be mandatory in every shop! Thanks guys for making life my life easier and my customers happier!

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