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
