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
Graph Tech has tuned the gear ratios to each string position
so that every string responds the same to any tuning adjustment. You get fine
tuning on the thicker core strings and coarser tuning on the thinner core;
anywhere from 12:1 to 39:1 gear ratio. With Ratio®, one turn is about one tone
change on all strings, making tuning, retuning and open tunings easier, quicker
and more intuitive.
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.
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.
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
