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3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, Select Finish and Button Style)

3+3 Ratio Electric Locking Machine Heads (PRL-8311, 8322, 8331, 8341, Select Finish and Button Style)

PRL-8311-C0

702725245901

Regular price $160.94 USD
Regular price Sale price $160.94 USD
Sale Sold out
Select Finish
Select Button Style

RATIO® patented gear technology
RATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.

From Low E to High E 39:1, 24:1, 20:1, 35:1, 20:1, 12:1.

We balanced the gear ratios to each string simplifying the tuning process.

With RATIO®, a half turn is a semi-tone!

Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string.

RATIO Machine Heads explanation video

 

The PRL-8311, 8322, 8331, 8341 are a right-handed sets of Locking RATIO® Calibrated Machine Heads for electric guitar that use 3 x 3 tuners, such as Gibson style and PRS style guitars.

A great upgrade over a single gear machine heads, such as Grover, Schaller, Sperzel, Kluson, etc.

 

It has a two pin casing that can be used as is, or with our Patented InvisoMatch Mounting Plates [opens in new tab].

4 different sets of InvisoMatch mounting plates in brushed aluminum are included to make installation on most guitars fast and accurate by using your existing screw mounting holes.

 

Ratio Tuned Machine Heads: The New Standard In Tuning Technology

 

Gear ratio: unique for each string position - one turn-one tone
Peg holes diameter required: 13/32" (10mm)
String post diameter: 0.236" (6mm)
String post length to string hole: 0.910” (23mm)
Weight per single machine head: 0.083lbs (38g)
Weight per set of six: 0.496lbs (225g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings
Includes complimentary 4 sets of aluminum mounting plates

Staggered Ratio Measurements.pdfRatio Installation Guide.pdfRatio Installation Guide Video

 

UPGRADE TO PREMIUM PLATED INVISOMATCH View full details
4.9
Rated 4.9 stars
Based on 8 reviews
Total 5 star reviews: 7 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
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8 reviews
  • KF
    Kevin F.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    5 days ago
    A+++++

    Excellent guitar tuners, easy installation, no drilling!

  • CM
    Clay M.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    2 weeks ago
    3+3 locking tuners!

    Easy to install, restringing is faster and seems to hold in tune longer. Each string seems to be smoother to adjust and get in pitch.

  • DA
    David A.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    3 weeks ago
    awesoem, love them! on a Epiphone SG 60's

    such nice smooth motion and they look great

  • AH
    Art H.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    3 weeks ago
    3x3 Locking tuners

    Just put a set on my new Gibson SG Standard, as always (I've used these before) the fit was perfect and so much easier change out strings and stay in tune so much longer. I put these on all my guitars, don't understand why guitars don't come with some level of locking tuner to begin with, these are the best I've used. When I buy a set of locking tuners Graphtech is the only place I go. They may cost more than others but they're also much better than the rest. If you have a Guitar that you consider a keeper you can't go wrong.

  • JR
    James R.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    1 month ago
    AFFORDABLE UPGRADE

    These tuners will elevate any guitar's overall sound and tuning stability above that provided by any manufacturer's make and model of stock tuners.

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