FULL-SIZE IMPERIAL™ (151 SERIES)

The Full-size Imperial (151 Series) is distinctive in styling and quality. The Imperial™ was first introduced in the 1970’s with its signature and futuristic Three-Step button, a fresh and funky design trademarked by Grover®. With 16:1 gear ratio.

The 151 Series is distinctive in styling and quality, the Imperial™ made its first appearance in the 1970’s. The most notable feature of this unique machine head is the futuristic Three-Step button, a fresh and funky design trademarked by Grover®.

  • Sealed-in, lubricated gears
  • 16:1 gear ratio
  • 25/64” post hole
  • Post length to hole: 22.2mm
  • Overall post length: 27.4mm
  • Weight per pc/per set: 1.8oz/10.8oz
  • Max. string gauge: .074”
  • Hardware included (bushings, screws)
  • Drop-in replacement for:
    • 152 Series

Available in:
For standard guitars, 3 Treble and 3 Bass, Set of 6
No. 151N Nickel
No. 151C Chrome
No. 151G Gold

Schematic Drawing

151 Series

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