Grover Super Rotomatics Machineheads ~ 3+3 ~ Black Chrome

3 treble and 3 bass, set of 6.

The 109-18 Series 3-step button gives these machine heads a distinctive look and sets them apart from other Rotomatics®. The housing provides a maximum bearing for worm, gear and string post. The 18:1 ratio provides for finer tuning and greater stability. The finer gears provide smoother tuning and a higher degree of backlash elimination. Countersunk tension screw permits player to regulate turning tension to any degree. Enclosed gear box with special lubricant for a lifetime of trouble-free service.

Sealed-in, lubricated gears
14:1 gear ratio
25/64” post hole
Post length to hole: 23mm
Overall post length: 28.2mm
Weight per pc/per set: 1.6oz/9.6oz
Max. string gauge: .074”
Hardware included (bushings, washers, screws)

Drop-in replacement for:
• 102-18 Series
• 102V Series
• 103 Series
• 106 Series
• 109 Series
• 135 Series (Top mounting hole will be visible)
• 136 Series (Top mounting hole will be visible)
• 502 Series
• 509 Series

For detailed specifications and/or fitting guides please locate this item on the Grover website where they offer more detailed information.