Detail 01
18:1 gear ratio
Supports precise tuning adjustments.
Product detailSKU #1500000429849
GroverProfessional Mandolin Vintage F Style 409 Series Pearloid Button Tuning Machines Nickel
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Independent shopping perspective
The Korena take
Grover’s nickel 409 Series Vintage F Style tuning machines combine an 18:1 ratio with adjustable worm gears for precise mandolin tuning. Their die-cast mounting plate keeps the gear assembly aligned, while open gears and bell-top pearloid buttons provide the vintage appearance. They are designed to drop into most mandolins, and mounting screws are included for the installation.
Strong match
Who this is for
- Replacing mandolin tuners where the 409 Series drop-in arrangement is appropriate.
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
Adjustable worm gears and die-cast mounting plate
Keeps the gears aligned for tuning accuracy.
Final check
Know before you order
- 01Confirm that your mandolin accepts this drop-in tuner arrangement; it is described as fitting most mandolins.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Are mounting screws included?
Yes. Screws are included.
02What is the gear ratio?
These tuning machines use an 18:1 gear ratio.
