Grover Vintage Style F Professional Mandolin Machine Heads 4 per side Nickel w/ Pearloid Buttons

Grover V309FVN Vintage tuner set for F style mandolins. Worm is under gear. Die cast, with an 18:1 ratio for fine tuning.  4+4 on plate, 29/32" (23mm) spacing, nickel plated with pearloid buttons. Mounting hardware (screws and bushings) provided.

Grover F-Style 409 Series Mandolin Tuning Machines

Standard 29/32" (23mm) string post spacing.
11/32"-diameter (8.73mm) pegholes required.

Each set includes:
• Pair of 4-left, 4-right tuning machines
• Removable pearloid plastic knobs
• Press-fit peghead bushings
• Mounting screws

Installation Tips

Peghole spacing: Plate-mounted tuners can't work efficiently if the pegholes are improperly drilled. Our ensures precise 29/32" spacing for accurate alignment for these tuning machines.

Bushings: We recommend the (.328" diameter) to cut a clean, accurate counterbore for a professional job. Fit the press-fit tuner bushings correctly so your tuners will work smoothly.

Mounting screws: Pilot holes required. Installing delicate screws into hard wood requires great care and accuracy. We highly recommend the (3/32" bit) for the pilot hole before installing these screws. Lubricate the screw threads with cutting lubricant (also wax or a bar of soap) to reduce friction and help them thread properly.


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