These guitar machines are a triumph in engineering and styling. The housing provides a maximum bearing for worm, gear and string post. Gear ratio is 14:1. Worm and gear are precision-cut for perfect meshing. This eliminates backlash and slippage. Countersunk tension screw permits player to regulate turning tension to any degree. Gear box has a special lubricant for lifetime, trouble-free service. Includes ? in. washers, bushings and wood screws.

Please Note: Grover tuning machines produced prior 1985 use different specifications for threading and shaft sizing. Current production replacement parts are not interchangeable on vintage (pre-1985) Grover tuning machines.

• Button Type = Grover kidney shape
• Gear ratio = 14:1
• Post Height = 1 1/16 in. (27mm)
• Post Diameter = 15/64 in. (6mm)
• Peghole Requirement = 25/64 in. (10mm)
• Bushing O.D. = Hex head 9/32 in. (7.8mm)
• Bushing I.D. = 1/4 in. (6.3mm)
• Collar Height = 25/64 in (10mm)
• Collar width = 25/64 in. (10mm)