Detail 01
18:1 gear ratio
Allows smaller tuning changes.
Product detailSKU #1500000470786
Grover102SV Roto SB Guitar Tuning Machines Black Chrome
Independent shopping perspective
The Korena take
Grover’s 102SV Roto SB set combines a black chrome finish with clear caps that leave the gear mechanism in view. Its sealed, oil-filled gears and 18:1 ratio support small tuning adjustments, while the tension screw lets you set how freely each key turns. The set is made for guitars with 25/64-inch post holes and accommodates string gauges through .074 inch. Required installation hardware is supplied.
Strong match
Who this is for
- Replacing guitar tuners on an instrument with 25/64-inch post holes.
- Making fine tuning adjustments with an 18:1 gear ratio.
- Guitars strung with gauges up to .074 inch.
Consider the trade-offs
When to look elsewhere
- Guitars with post holes other than 25/64 inch.
- String gauges above .074 inch.
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 tension screw
Lets you change the resistance when turning the tuning keys.
Detail 03
Clear caps
The internal gears remain visible.
Final check
Know before you order
- 01Confirm that your guitar has 25/64-inch post holes.
- 02Confirm that your string gauge does not exceed .074 inch.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What post-hole size do these tuning machines require?
They fit guitars with 25/64-inch post holes.
02Can I adjust how the keys turn?
Yes. A tension screw adjusts how firm or free the tuning machines feel.
03Is installation hardware included?
Yes, the required hardware is included.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
1 detailsBody & build
- Color
- Black
