Detail 01
Adjustable worm gears
Work with the 18:1 ratio for accurate tuning adjustment.
Product detailSKU #1500000429798
GroverProfessional Mandolin Vintage F Style 409 Series Pearloid Button Tuning Machines Chrome
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Independent shopping perspective
The Korena take
Grover’s chrome Vintage F Style 409 Series pearloid-button machines bring an open-gear, bell-top look to a mandolin while focusing on precise adjustment. The 18:1 ratio and adjustable worm gears are paired with a die-cast mounting plate that keeps the gears aligned. They are described as dropping into most mandolins, and screws are included for installation.
Strong match
Who this is for
- Mandolin installations described as compatible with most instruments, with screws included for mounting.
- Players looking for pearloid bell-top buttons and vintage-style open gears.
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
Die-cast mounting plate
Keeps the gears properly aligned.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Are mounting screws included?
Yes. Hardware is included in the form of screws.
02Will these work on every mandolin?
They are described as dropping into most mandolins.
