Detail 01
14:1 gear ratio
Supports fine adjustments to each string’s pitch.
Product detailSKU #1500000429399
GroverSuper Rotomatics 109 Series Tuning Machines Nickel
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Independent shopping perspective
The Korena take
The nickel Grover Super Rotomatics 109 Series gives you 14:1 gearing for precise string-pitch adjustments. Its lubricated gears are enclosed, with the design described as eliminating backlash and slippage for smooth tuning movement. A countersunk tension screw lets you set the turning resistance to your preferred feel, making these a focused choice for players who want to tailor how the keys respond during tuning.
Strong match
Who this is for
- Setting tuner turning resistance to a personally preferred feel with the countersunk tension screw.
- Making controlled pitch adjustments with a 14:1 gear ratio.
Consider the trade-offs
When to look elsewhere
- Players who do not want adjustable turning tension at the tuning keys.
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 turning tension.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can I adjust how stiff the keys feel?
Yes. A countersunk tension screw allows the turning tension to be adjusted.
02What is the gear ratio?
The 109 Series uses a 14:1 gear ratio.
