Detail 01
18:1 gear ratio
Allows small, precise tuning adjustments.
Product detailSKU #1500000470785
Grover102SV Roto SB Guitar Tuning Machines Nickel
Independent shopping perspective
The Korena take
Grover’s 102SV Roto SB nickel tuning machines combine visible clear gear caps with sealed, oil-filled gearing. The 18:1 ratio is intended for fine tuning changes, and the tension screw lets you set how freely or firmly each machine turns. They are specified for guitars with 25/64-inch post holes and strings up to .074 inch. With the required mounting hardware included, this set is suited to replacing damaged tuners or updating an older guitar once those fit details are confirmed.
Strong match
Who this is for
- Replacing damaged guitar tuning machines after confirming the existing 25/64-inch post-hole size.
- Players who want to set tuner turning resistance with an adjustable tension screw.
- Guitars strung with gauges up to .074 inch.
Consider the trade-offs
When to look elsewhere
- Guitars whose post holes are not 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
Sealed gears with internal oil
The gears are enclosed and lubricated inside the tuning machines.
Detail 03
Clear caps
The gear mechanism remains visible through the cap.
Detail 04
Adjustable tension screw
Lets you alter how hard or easy the tuners turn.
Final check
Know before you order
- 01Confirm that your guitar has 25/64-inch post holes.
- 02Confirm your string gauge is no larger than .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 tuners feel when turning?
Yes. A tension screw lets you adjust the turning resistance.
03Is mounting hardware included?
Yes. The required hardware is included.
