Pictured: Chrome
Pictured: Chrome
Pictured: Black Chrome
Pictured: Gold
Click to zoom in
Customer Images:
No Images yet! Submit a product image below!
Tuners - Grover, Rotomatic Roto-Grip locking, 3 per side
The newest addition to the Grover family, these locking machine heads utilize the famous 18:1 Rotomatic® design with a “thumb screw” mechanism which locks the string into place. Insert the string through the post hole, wrap around once, then lock by tightening with the thumb screw. Perfect replacement for the most standard machine heads. Includes all mounting hardware.
Includes 3 treble and 3 bass.
SKU:
P-GRV-502X
Item ID:
002155
Brand:
Grover
Button Finish:
Button Shape:
Gear Ratio:
Locking:
Mounting Type:
Sold By:
Tuning Machines:
Type:
RoHS Compliant
| Color | Our Part Number | UPC/EAN | Grover Part Number |
|---|---|---|---|
| Black Chrome | P-GRV-502BC | 082562082960 | 502BC |
| Chrome | P-GRV-502C | 082562082977 | 502C |
| Gold | P-GRV-502G | 082562082984 | 502G |
| Body Depth | 8.4 mm | |
| Body Length | 30 mm | |
| Body Width | 41.8 mm | |
| Gear Ratio | 1:18 | |
| Knob Depth | 8.4 mm | |
| Knob Length | 23.85 mm | |
| Knob Width | 17 mm | |
| String Post Diameter | 6 mm |
| Packaging Dimensions | 9.3 in. × 4.8 in. × 1.9 in. | |
| Weight (Packaging) | 0.67 lbs. |
| P-GRV-502C - Chrome version | Body Depth | 8.4 mm |
| Body Length | 30 mm | |
| Body Width | 41.8 mm | |
| Gear Ratio | 1:18 | |
| Knob Depth | 8.4 mm | |
| Knob Length | 23.85 mm | |
| Knob Width | 17 mm | |
| String Post Diameter | 6 mm | |
| P-GRV-502G - Gold version | Body Depth | 8.4 mm |
| Body Length | 30 mm | |
| Body Width | 41.8 mm | |
| Gear Ratio | 1:18 | |
| Knob Depth | 8.4 mm | |
| Knob Length | 23.85 mm | |
| Knob Width | 17 mm | |
| String Post Diameter | 6 mm | |
| P-GRV-502BC - Black Chrome version | Body Depth | 8.4 mm |
| Body Length | 30 mm | |
| Body Width | 41.8 mm | |
| Gear Ratio | 1:18 | |
| Knob Depth | 8.4 mm | |
| Knob Length | 23.85 mm | |
| Knob Width | 17 mm | |
| String Post Diameter | 6 mm |
 Installation Instructions | All Models |
 Specification Sheet | All Models |
My Project Lists
Specifications, Files, and Documents
Specification Sheet Questions and Answers
Click each question to see its answers.
2 answers
Why does it say to wrap string around post before tightening thumbscrew? Shouldn't they work like any other locking tuner?
Asked by Anonymous on October 13th, 2016.
In order for you to get the most out of these tuners, you need to get one full wrap around the tuning post and then tighten the thumbscrew. This is how Grover designed these to work.
It doesn't say wrap string before tightening. It says put string through the hole and leave enough slack in string for approx 1 wrap. Tighten thumb screw and then tune to pitch.
So, in other words you tighten thumb screw first then wrap the slackened string to pitch.
1 answers
I have Grover tuners on my Epiphone ej200. I would like to replace them with these locking tuners. will they fit?
Asked by Anonymous on October 14th, 2016.
Yes they should fit. The shaft of these tuners are 10mm in diameter. Please measure your existing tuners to insure a proper fit.
1 answers
Will this fit an epiphone dot?
Asked by Anonymous on February 16th, 2017.
These tuners have a shaft diameter of 10mm and you will want to make sure your headstock is reamed for 10mm. Also, the setscrew that holds the tuner in place is perpendicular to the tuner key. You will want to make sure your tuners have the same orientation to prevent permanent modifications.
1 answers
Will these fit an electrical guitar company guitar? aluminum. Currently with Gotoh standard tuners.
Asked by Anonymous on March 17th, 2017.
These tuners have a shaft diameter of 10mm and you will want to make sure your headstock is reamed for 10mm. Also, the setscrew that holds the tuner in place is perpendicular to the tuner key. You will want to make sure your tuners have the same orientation to prevent permanent modifications.
1 answers
Will these fit on my gibson 2013 lpj without having to drill new holes?
Asked by Anonymous on April 18th, 2017.
If the LPJ is reamed for a 10mm tuner shaft these should work. Also, if you are replacing Kluson style tuners you will have one unoccupied hole per tuner on the back of your headstock.
1 answers
Will these fit a Schecter Tempest Standard without mod?
Asked by Anonymous on June 1st, 2017.
These tuners have a shaft diameter of 10mm and you will want to make sure your headstock is reamed for 10mm. Also, the setscrew that holds the tuner in place is perpendicular to the tuner key. You will want to make sure your tuners have the same orientation to prevent permanent modifications.
Product Reviews
Fast service and the tuners work great
I bought these tuners because I was having tuning stability issues with my Les Paul Custom. The guitar already had standard Grover Rotomatics (the non-locking kind), but just wasn't staying in tune. I couldn't really make it through a whole song end to end without the guitar going out of tune and wasn't sure whether it was the nut, tuners, or something else. I eventually decided to try things 1 by 1 until the problem was fixed and started with the tuners.
I'm not a guitar tech nor am I particularly handy at fixing stuff and so I specifically bought these tuners because are were a direct drop-in replacement for the original rotomatics tha came with the guitar. Since it was already fitted for Grovers, they were easy to install with no drilling required. All told, it probably took me about an hour to swap out the tuners and restring. I also widened the tuner side slot openings on the nut for the G & D strings. It's only been a few days, but tuning stability appears to be much improved and I'm quite happy with my purchase.
The locking tuners were easy to install and work great! Thanks again.
Drop in replacement for cheap probably Gotohs on a 90's AS80 Ibanez project. Not as good as comparable Schallers but that's another $40+. They get the job done.
Replaced my original Epi LP Custom Pro gold Grover tuners with these black Grover locking tuners. Love them. Really like the look on the guitar and ease of changing strings. These replacements fit perfectly and no issues. Highly recommend.
This is my second set,these are a must for Les Paul's with non locking grovers!!!and amplified parts offer the best price period!!!
These are great tuners, perfect for any guitar with stock Grovers. Upgrade in tuning stability and countless hours saved changing strings. My favorite from Grover, and the best price is right here.
I ordered these for my les paul, and another set for my V. Easy to install, Easy to change strings, hold tuning well. Best tuners, and best price from amplified parts. Gold looks great on cherrybursts