Rotomatic with 18:1 Gear Ratio(102-18 Series)

The original Rotomatic with an improved higher ratio gearing. The 18:1 ratio provides for finer tuning and greater stability. The finer gears provide smoother tuning and a higher degree of backlash elimination. This new version of the Rotomatics uses the exact housing as the original. Only the gearing has changed. Includes 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 = 18:1
• 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)

The original Rotomatic with an improved higher
ratio gearing. The 18:1 ratio provides for finer tuning and greater
stability. The finer gears provide smoother tuning and a higher degree
of backlash elimination. This new version of the Rotomatics uses the
exact housing as the original. Only the gearing has changed. Includes
washers, bushings, and wood screws.