Gotoh SG301 MGT Locking Tuning Keys — 3 a Side, Grover Rotomatic Replacement, Gold (SG301-MGT-GOLD)

The Gotoh SG301 MGT (SG301-MGT-GOLD) is a set of six locking tuning keys in a 3-a-side configuration with gold finish — and a direct drop-in replacement for Grover 102 Series Rotomatic tuners. Built in Japan to Gotoh's precision engineering standards, the SG301 MGT features an 18:1 gear ratio, traditional thumbwheel Magnum Lock mechanism, Gotoh 01 button, XL long posts accommodating headstock thickness up to 17mm, and a 10mm shaft hole requirement matching the Grover 102 Rotomatic footprint exactly. Includes screw-in bushings, washers and fixing screws. Gold is the correct finish for Les Paul Standard, Custom, Traditional and other Gibson instruments with gold bridge, tailpiece, pickup rings and hardware throughout — matching the warm gold hardware specification that defines the premium Les Paul aesthetic. Before ordering, verify your headstock's existing bushing hole diameter (must be 10mm) and confirm base plate dimensions against the technical diagram provided.

Finish Selection — All Three SG301 MGT Variants

Direct Grover 102 Rotomatic Replacement — No Drilling Required

The SG301 MGT matches the Grover 102 Series Rotomatic's 10mm bushing hole and base plate screw spacing exactly — a direct drop-in replacement on any headstock currently fitted with Grover 102 Rotomatics. Remove the Grovers, install the Gotoh, no modification to the headstock required. For Les Paul players replacing the factory-fitted gold Grover 102 Rotomatics, the SG301-MGT-GOLD installs in the same holes with the same hardware, adding locking capability and Gotoh's 18:1 precision mechanism without touching the headstock.

MGT Thumbwheel Locking — Invisible from the Front

The MGT thumbwheel locking mechanism operates from the back of the tuner — invisible from the playing position and from the front of the instrument. Wind the string on normally, tune to pitch, tighten the thumbwheel to lock. No change to stringing technique, no strings cut short, no visual change to the headstock. For players on premium instruments where aesthetics are as important as performance, the MGT's invisible locking mechanism preserves the instrument's visual character completely while adding the practical benefits of locking performance.

XL Long Posts and 18:1 Ratio

XL extended posts accommodate headstock thicknesses up to 17mm — important for heavily lacquered Les Paul headstocks where finish buildup can push thickness beyond standard-length post capacity. The 18:1 gear ratio provides finer tuning increments and better stability under string tension than the ratios on standard Grover 102 Rotomatics.

Who Is the SG301-MGT-GOLD For?

• Les Paul Standard, Custom and Traditional players with gold hardware replacing factory-fitted gold Grover 102 Rotomatics with locking performance
• Players on any 3-a-side guitar with 10mm bushing holes and gold hardware wanting locking tuners without headstock modification
• Players who want locking performance while maintaining complete gold hardware consistency across the instrument
• Players on thick or heavily lacquered Les Paul headstocks where XL posts ensure correct tuner seating
• Players with chrome hardware should choose SG301-MGT-CHROME — players with black hardware should choose SG301MGT-003

Specifications

Expert Advice and Installation at Angkor Music

At Angkor Music Melbourne we stock the Gotoh SG301 MGT in gold, chrome and pure black. For Les Paul players with gold hardware, the SG301-MGT-GOLD is the correct product — contact us to confirm before ordering if you are unsure which finish your instrument has. Professional installation is available through our guitar technician.

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Frequently Asked Questions

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