Gibson Accessories ABR-1 Tune-o-matic Bridge – StewMac

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Gibson Accessories ABR-1 Tune-o-matic Bridge

The original Gibson bridge, right from the source!

The ABR-1 Tune-o-matic bridge was the brainchild of legendary Gibson president Ted McCarty in 1954, setting a standard for simplicity and functionality that has never been bettered.

The ABR-1 is installs directly into the body of the guitar using a separate stud and thumbwheel, providing a firm seating for the strings and allowing players the ability to adjust and fine tune intonation and string height in a matter of minutes. It also yields a great union between the strings and body, which results in excellent vintage tone and sustain.

Dimensions:

String Spread: 2-1/32″ (51.56mm)
Saddle Radius: 12″ (304.80mm)
Post Spacing: 2-29/32″ (73.66mm)
Post Threads: 6-32 x 1-1/16″
Genuine Gibson part

Gibson ABR-1 Tune-o-matic Bridge features:

Unnotched saddles
Closed-bottom construction
Includes posts and thumbwheels

About bridge & tailpiece measurements

Bridge and Tailpiece Measurements Snippet

String spread is the distance between the centers of the outer strings on a bridge or tailpiece.

Saddle radius determines the arc formed by all the individual saddle heights, and is similar to the measurement of a fretboard.

Stud/post spacing is the distance between the centers of the mounting posts of a bridge or ‘stop’ tailpiece.

Positioning the bridge
Find bridge placement for any scale with our free online tool fret position calculator.

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.