Ratio - Tuned Machine Heads are the first and only machine head to incorporate the different string gauges into the tuning equation. GraphTech balanced the individual gear ratios to each string dramatically simplified the tuning process. No more overshooting the G string or twisting away on the high E string.
With Ratio, each half key turn equals one semitone change on all strings! Quicker, more accurate tuning on every string.
The PRL-8731-C0 is a set of Ratio Locking Tuned Machine Heads for an electric guitar that uses six in line tuners. It has classic buttons and two pin casing and is finished in chrome.
Includes InvisoMatch Standard Mounting Plates for easy installation. Fits most headstocks.
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