Detail 01
18:1 gear ratio
Provides more controlled, precise tuning adjustment.
Product detailSKU #1500000429756
GroverMid-Size Rotomatics 305 Series Tuning Machines Black Chrome Reverse 6-in-line
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Independent shopping perspective
The Korena take
Grover’s 305 Series tuning machines combine an 18:1 ratio with sealed, lubricated gearing for measured tuning adjustments that stay steady through a performance. Their compact mid-size footprint is designed for smaller guitar headstocks, helping avoid excess hardware weight at the end of the neck. The 22.4 mm posts accommodate most string gauges. This version is finished in Black Chrome and uses a reverse 6-in-line configuration.
Strong match
Who this is for
- Replacing hardware on a guitar with a smaller headstock and reverse 6-in-line tuner layout.
- Performance setups where steady tuning and finer adjustment control matter.
Consider the trade-offs
When to look elsewhere
- Guitars requiring a tuner arrangement other than reverse 6-in-line.
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
Sealed, lubricated gears
The geared mechanism is protected and lubricated to help prevent slipping.
Detail 03
22.4 mm post length
Accommodates most string gauges.
Final check
Know before you order
- 01Confirm that your guitar uses a reverse 6-in-line tuner configuration.
- 02Check that a 22.4 mm post length suits your string setup.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What tuning ratio do these machines use?
They use an 18:1 gear ratio for precise tuning adjustment.
02Are these intended for smaller headstocks?
Yes. Their compact design is made to mount on smaller headstocks.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Black
