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 2 of 13 1 2 3 4 5 6 7 8 9 10 11 12 13
Write a review

A real time saver.

By Highline Guitars from Denver, Colorado
(Customer's Reviews) Friday, March 21, 2014

I get perfectly spaced slots every time with this handy tool.

Excellent Handy Tool! I love it!

By Rockin' Mike Burton from Canada
(Customer's Reviews) Thursday, February 13, 2014

This was a great tool! It saved me time and gave really accurate spacing results! I was very impressed!

String Spacing Rule

By Red Fox Guitars from Albert Lea, MN
(Customer's Reviews) Sunday, February 02, 2014

I love this thing. I added a piece of tape down the middle, so I can easily mark with pencil and see the marks. This is a must for anyone working at home or in a shop.

Easy peasy

By Mark Tiongco from Coppell, Tx
(Customer's Reviews) Saturday, February 01, 2014

Worked perfectly on marking the slots on my brass saddled Nashville bridge.

Worth every penny!

By justinarts from West Texas, USA
(Customer's Reviews) Monday, January 20, 2014

I bought this a couple of years ago and have used it almost daily. It is a great quality tool and is a tremendous time saver!

What a time saver!

By Patrick A. from Ottawa, Ontario
(Customer's Reviews) Sunday, January 19, 2014

Wow, what a time saver! I'm very pleased with the quality; totally worth the price.

String Spacing Rule

By Mr. R from Cincinnati, OH
(Customer's Reviews) Sunday, December 22, 2013

If you space strings on centers, not worth the money. However if you plan to make more than one nut with equal spacing between strings it's worth every penny. Manual calculations are cumbersome and prone to error. This is extremely quick and deadly accurate.

should have found this a long time ago...

By JeeWee Donkers from Ede, the Netherlands
(Customer's Reviews) Sunday, December 15, 2013

brilliant time saver! I really should have had one like 15 years ago, it would have saved me tons!

handy dandy tool

By Craig007 from Phelps, NY
(Customer's Reviews) Saturday, November 30, 2013

What more can you say other then this tool is awesome! Talk about a time saver. I wish I'd thought of it! Best of all it is accurate and well priced, two top considerations for any tool purchase.

Easy to use

By Chriztian from Norway
(Customer's Reviews) Wednesday, November 27, 2013

Perfect tool for the job. You can not get it wrong with this tool.

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