Graph Tech Ratio Machine Heads – Ultimate Control & Precision

The open backs
are a right handed set of open back Ratio Calibrated Machine Heads
for Acoustic guitars that use three per side tuners. Classic skeleton
button.

 A right
handed set of Ratio Tuned Machine Heads for acoustic guitar that use
three per side tuners. It has a two pin casing that can be used as is, or with Graph Tech s InvisoMatch mounting plates.

THE SIMPLE GENIUS
BEHIND RATIO® SYNCHRONIZED  MACHINE HEADS

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, 14:1, 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.

PREDICTABLE, PRECISE
TUNING, RETUNING AND OPEN TUNINGS.

Ratio® tuning feels natural. You don t have to think about
which string you are tuning because they all feel and respond the same. No more
overshooting the Low E or plain G. No more twisting away on the High E or D
string. Open tunings have never been easier. String gauges such as light top,
heavy bottom are no problem with Ratio®; they still do the same precision
tuning.

Gear ratio: unique for each string position – one turn-one tone
Peg holes diameter required: 0.346 (8.8mm)
String post diameter: 0.236 (6mm)
String post length to string hole: 0.827” (21mm)
Weight per single machine head: 0.056lbs (25.5g)
Weight per set of six: 0.338lbs (153g)
String diameter up to 72 gauge
Includes 6 machine heads, mounting screws and bushings

 

v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}

Normal
0
false

false
false
false

EN-US
X-NONE
X-NONE

* Style Definitions *
table.MsoNormalTable
{mso-style-name: Table Normal ;
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-priority:99;
mso-style-parent: ;
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin-top:0in;
mso-para-margin-right:0in;
mso-para-margin-bottom:8.0pt;
mso-para-margin-left:0in;
line-height:107%;
mso-pagination:widow-orphan;
font-size:11.0pt;
font-family: Calibri ,sans-serif;
mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;
mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin;
mso-bidi-font-family: Times New Roman ;
mso-bidi-theme-font:minor-bidi;}