Detail 01
18:1 gear ratio
Supports accurate, precise tuning adjustments.
Product detailSKU #1500000429860
GroverProfessional Mandolin Vintage A Style 409 Series Black Button Tuning Machines Chrome
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Independent shopping perspective
The Korena take
The chrome-and-black Grover 409 Series Vintage A Style tuning machines are built for mandolin players who want precise adjustment in vintage-styled hardware. An 18:1 ratio supports accurate tuning for consistent intonation, while the open worm gears and die-cast plates provide the exposed mechanical look of the series. Bell-shaped button screws complete the detailing. They are described as dropping into most mandolins, making them a focused hardware upgrade for that application.
Strong match
Who this is for
- Fine 18:1-ratio tuning adjustments with chrome hardware and black buttons.
- Upgrading most mandolins with a drop-in 409 Series tuning-machine set.
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
Open worm gears with die-cast plates
Combines exposed gear styling with the series’ vintage appearance.
Final check
Know before you order
- 01These tuning machines are described as a drop-in fit for most mandolins; confirm your instrument accepts them.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What is the gear ratio?
The 409 Series uses an 18:1 gear ratio for precise tuning adjustments.
02What color is this version?
It has chrome hardware with black buttons.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Black
