Overview
The Mid-Size series is made with the same quality as the other Rotomatic® models. Slightly larger than the Mini Rotomatics®, the mid size series features an 18:1 gear ratio for smoother, more precise tuning. This compact machine head is perfect for use on smaller and in-line headpieces.
• Sealed-in, lubricated gears
• 18:1 gear ratio
• 25/64” post hole
• Post length to hole: 22.4mm
• Overall post length: 27.5mm
• Weight per pc/per set: 1.2oz/7.2oz
• Max. string gauge: .064”
• Hardware included (bushings, washers, screws)
• Drop-in replacement for: 406 Series
About Grover Musical Products
For over a century, Grover Musical Products has been equipping musicians of all levels - from beginners to professionals - with high-quality musical accessories and parts that deliver clarity, reliability, and performance.
Founded in Cleveland, Ohio in 1922, Grover's legacy includes iconic tuners, machine heads, and instrument accessories that generations of players trust to make great music. Grover's family-run company continues to innovate while honouring a tradition of excellence that spans decades.
Specification
| Commodity Code | 9209992000 |
|---|---|
| Manufacturer | Grover |
| Country of Origin | Korea |
| Barcode | 082562078819 |
| Master Carton | 12 |
| Instrument Type | Acoustic/Electric |
| Back, Neck, Ribs | Select European Maple (two-piece) (Aged >6 years) Grade 3 Flame |
Packaged Weight & Dimensions
| Height (CM) | 22.86 |
|---|---|
| Width (CM) | 3.81 |
| Depth (CM) | 12.7 |
| Weight (Kg) | 0.454 |


