The Grover Rotomatics 102 Series Machine Heads are one of the most recognisable hardware designs in the guitar industry, having been a standard choice for professional instruments for decades.

Mechanical Precision, Custom Feel

The 102 Series uses a 14:1 gear ratio, offering a traditional feel that many players find strikes the right balance between speed and accuracy. 

The gears themselves are precision-cut to ensure they mesh perfectly, which helps to prevent the "slipping" or "play" often found in cheaper alternatives. 

One particularly useful feature is the tension screw on the tuner button; this allows you to adjust exactly how much resistance you feel when turning the peg, so you can set it to your personal preference. 

To keep things moving smoothly over the years, the gears are sealed in a lubricated housing that protects them from dust and grit.

Straightforward Installation

These tuners are designed to be a direct "drop-in" replacement for a wide range of Grover models, including the 102-18 and 502 series, which simplifies the upgrade process for most guitar owners. 

They have a solid, high-mass feel that many players believe helps with headstock stability and overall sustain. 

The set is built for a 3+3 headstock configuration and includes everything you need to get them fitted, such as the mounting screws, washers, and bushings.

Grover Rotomatics 102 Series Features & Specifications

• 14:1 gear ratio provides a classic balance of speed and tuning control

• Precision-cut internal gears eliminate backlash and prevent string slippage

• Adjustable tension screws allow the player to customise the turning resistance

• Sealed and permanently lubricated gear housing for lifetime maintenance-free use

• Fits standard 25/64 inch (approx. 10mm) diameter headstock holes

• Post length of 23mm to the string hole with a total post height of 28.2mm

• Solid construction with a total set weight of 9.6oz

• Compatible with heavy string sets up to a maximum .074 gauge

• Direct replacement for most Grover 102, 103, 106, 109, and 502 series models

• Full set of 3+3 tuners supplied with all necessary mounting hardware

• Available with Chrome or Nickel Finish