Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune combines vintage aesthetic styling with precise tuning response and smooth mechanical operation. Designed as an open-gear tuner with an exposed worm gear, it delivers an optimized 1:18 gear ratio for fine-tuning stability and longevity across acoustic, electric, and classical instruments.
Built without synthetic polymer coatings, the tuner provides pure metal-to-metal contact and uninhibited acoustic resonance. Permanently locked, sealed screw connections eliminate wear, maintaining tight tolerances and maintenance-free reliability over extended use.
Standard mounting dimensions ensure straightforward installation or direct retrofitting on production headstocks. Countersunk mounting screw holes optimize contact with the wood, promoting reliable mechanical coupling and effective string vibration transfer.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Single Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight per Single Tuner | 0.63 oz (Koa), 0.67 oz (Perloid), 0.71 oz (Galalith, Ebony), 0.74 oz (Snakewood), 0.88 oz (Butterbean) including bushing |
| Button Dimensions (WxHxD) | 0.8 x 0.54 x 0.41 in (Butterbean), 0.69 x 0.54 x 0.24 in (all other buttons) |
| Press-In Bushing Outer Diameter | 0.35 in |
| Press-In Bushing Inner Diameter | 0.24 in |
| Mounting Screws | 2x M2.2 x 11 mm (0.09 x 0.43 in) |
| Shipping Weight | 0.11 lb |
