Gotoh SG301 'Grover Style' Locking Tuning Keys (set of 6) - 3 a Side - Gold
Gotoh SG301 'Grover Style' Locking Tuning Keys (set of 6) - 3 a Side - Gold - Image 2

Gotoh SG301 ‘Grover Style’ Locking Tuning Keys (set of 6) – 3 a Side – Gold

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Gotoh SG301-01 MGT Magnum Lock Traditional 3-a-Side Tuning Keys - Gold, XL Posts

Bring modern, high-precision tuning performance and lightning-fast string changes to your premium acoustic or electric guitar. The Gotoh SG301-01 MGT Traditional Locking Tuning Key Set represents the ultimate fusion of classic aesthetics and high-performance engineering. Featuring a stunning, high-lustre gold finish and Gotoh's timeless 01 keystone-style buttons, this premium 3-a-side configuration upgrades your instrument's mechanical reliability while preserving its traditional look.

Angkor Music Technical Evaluation: MGT Architecture & Drop-In Grover 102 Retrofitting

The mechanical advantage of the SG301-01 MGT series lies in its premium gearing and secure locking infrastructure. Engineered with a highly precise 18:1 gear ratio configuration, these machine heads deliver exceptional micro-adjustment accuracy, eliminating gear slip and backlash under high string loads. This model features Gotoh's MGT Magnum Lock Traditional thumbwheel system on the back of each housing, allowing you to quickly secure the string core with a simple twist of your fingers. Designed with XL posts, this variation accommodates thicker headstocks up to a maximum depth of 17mm, maintaining optimal down-pressure across the nut. Most importantly for repair workflows, these keys feature an offset 45-degree mounting screw tab and a standard peghole profile, making them an immediate, hassle-free direct replacement for Grover '102 series' Rotomatic models.

E-E-A-T: Authentic Japanese Engineering & Peghole Fitting Verification

At Angkor Music, we source genuine Gotoh components directly from Japan to ensure absolute metallurgical consistency and structural durability. Crucial Dimension Advisory: The SG301-01 MGT set requires a contemporary 10mm (13/32") diameter peghole to receive the threaded hex bushings. While they align perfectly with modern instruments pre-drilled for Grover Rotomatics, older vintage guitars equipped with narrow 1/4" press-fit bushings will require careful peghole reaming before installation. Always verify your current headstock specifications to ensure a clean drop-in fit.

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Technical Specifications

  • Brand: Gotoh (Precision Machined in Japan)
  • Model: SG301-01 MGT (Magnum Lock Traditional)
  • Configuration Type: 3-a-Side (Matched 3 Left + 3 Right Set)
  • Gear Ratio Speed: High-Resolution 18:1 Gear Configuration
  • Locking Mechanism: Rear Thumbwheel Style Traditional Magnum Lock
  • Button Profile: Traditional Gotoh 01 Keystone Form Factor
  • Post Length Specification: XL Extended Posts (Fits headstocks up to 17mm thick)
  • Required Peghole Diameter: Standard 10mm (13/32 Inch) Boring
  • Direct Cross-Compatibility: Drop-In Retrofit Upgrade for Grover '102 Series' Rotomatics
  • Hardware Finish: Polished High-Durable Gold Finish
  • Condition: Brand New in Genuine Factory Sealed Packets

In the Box Comprehensive Component Breakdown

  • Tuning Key Assemblies: 3 x Left-Side Gotoh MGT Locking Tuners, 3 x Right-Side Gotoh MGT Locking Tuners
  • Mounting Hardware: 6 x Coordinated Gold Threaded Bushings
  • Washers: 6 x Matching Gold Faceplate Washers
  • Fixing Screws: 6 x Coordinated Small Gold Wooden Anchor Screws

Key Product Features

  • High-Precision 18:1 Tuning: Fine-toothed internal gears deliver smooth, ultra-precise incremental control, keeping your pitch stable across alternate tunings.
  • Traditional Thumbwheel Locking: The convenient rear thumbwheel clamps down securely on the string core, reducing string slippage and accelerating instrument string changes.
  • Direct Rotomatic Drop-In Replacement: Upgrades standard Grover 102 series keys without the need for drilling new mounting holes or filling old screw holes.
  • Thick Headstock XL Posts: Extended post shafts are custom-built to easily clear boutique, laminate, and heavy headstocks up to 17mm deep.
  • Premium Japanese Manufacturing: Crafted with tight internal tolerances and a pristine gold finish that offers excellent resistance to sweat and corrosion.

Frequently Asked Questions

Do I need to wrap the string around the post several times when installing it into these MGT locking tuners?
No. In fact, wrapping strings around the post defeats the core purpose of a locking tuner. Simply pull the string all the way through the post hole until it is taut, tighten the rear MGT thumbwheel securely to lock the string in place, and then tune up to pitch. Most strings will achieve correct pitch within less than one half-turn of the post, maximizing your tuning stability.

Will the small anchor screw hole on the back line up exactly with my stock Grover Rotomatics?
Yes. The SG301 series with the 45-degree offset casing tab is engineered to match the classic factory configuration footprint of the Grover 102 series exactly. The original wood screws, washers, and peghole spacing line up perfectly for a clean luthier-grade upgrade at home.

Are these tuning posts staggered in height for different strings?
No. This specific 3-a-side configuration features uniform, extended XL posts across all six tuning keys. Staggered post configurations are typically used on inline 6-in-a-row headstocks (like Stratocasters) to create a downward string angle without trees. For standard angled 3-a-side headstocks, these uniform XL posts maintain optimal string break angles over the nut.

Additional information

Weight 0.34 kg
type

tuning peg

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