Detail 01
14:1 gear ratio
Provides the fine tuning control described for the 102 series.
Product detailSKU #1500000429380
GroverRotomatics 102 Series Keystone Button Tuning Machines Chrome
Independent shopping perspective
The Korena take
Grover’s 102 keystone-button tuning machines pair a 14:1 ratio with sealed, lubricated gears for fine tuning adjustment. The oversize housing provides bearing surface for the worm, gear, and string post, and the countersunk screw lets you tailor tuner tension. They are presented for classical guitars, steel-string acoustics, and archtop jazz guitars, giving those setups an adjustable, precision-focused tuner option in chrome.
Strong match
Who this is for
- Classical-guitar setups using keystone-button 102 series tuning machines.
- Steel-string acoustic or archtop jazz guitar hardware updates requiring adjustable tuner tension.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Countersunk tension screw
Lets you adjust the tuning-machine tension to your own setting.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can I adjust the tension on these tuners?
Yes. The countersunk tension screw allows tension adjustment.
02Which guitar types are named for these machines?
They are described for classical guitar, steel-string acoustic, and archtop jazz guitar.
