Detail 01
18:1 gear ratio
Provides the controlled tuning adjustment described for the 102-18 series.
Product detailSKU #1500000429375
GroverRotomatics With 18:1 Gear Ratio 102-18 Series Standard Button Tuning Machines Black Chrome
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Independent shopping perspective
The Korena take
Grover’s 102-18 tuners combine a sealed, lubricated 18:1 mechanism with a 28.2 mm post and 25/64-inch post hole. The result is controlled pitch adjustment with extra room for winding strings, including heavier gauges. An oversized housing supports the mechanism, while the countersunk screw lets you set tuner tension to your preference. They are a focused hardware choice for guitarists who want a more deliberate tuning adjustment.
Strong match
Who this is for
- Restrung guitars using heavier-gauge strings that need the stated 25/64-inch post hole.
- Players who want to set their tuning-machine tension with an adjustable screw.
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
28.2 mm post length
Gives additional winding room on the post.
Final check
Know before you order
- 01Confirm your guitar’s existing post-hole requirement before installation; these tuners use a 25/64-inch post hole.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can the tuner tension be adjusted?
Yes. A countersunk tension screw allows the tension to be adjusted to your preference.
02Are these intended for heavier-gauge strings?
The 25/64-inch post hole is described as accommodating heavier-gauge strings.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Black
