Schaller GrandTune Single Guitar Tuning Machine
The Schaller GrandTune Single Guitar Tuning Machine combines classic vintage design with precise tuning stability and ultra-smooth performance. Built with an open-gear architecture and precision worm gear, it delivers an exact 1:18 gear ratio for refined accuracy and long-term durability on your instrument.
Constructed without synthetic polymer coatings, this tuning machine features ultra-precise contact surfaces that provide flawless stick-slip performance while maximizing acoustic resonance. The permanently locked, sealed screw joints ensure completely maintenance-free and wear-free operation over extended use.
Engineered to standard instrument dimensions for effortless retrofitting and installation, it features countersunk screw holes for secure mounting and optimal acoustic coupling between the tuner and headstock.
| Brand | Schaller |
| Model | GrandTune Single (GT-Single) |
| Product Type | Single Guitar Tuning Machine |
| Gear Ratio | 1:18 |
| Weight per Single Tuner | 0.6 oz (Koa), 0.7 oz (Pearloid), 0.7 oz (Galalith, Ebony), 0.7 oz (Snakewood), 0.9 oz (Butterbean) including press-in bushing |
| Button Dimensions (WxHxD) | 0.8 x 0.5 x 0.4 in (Butterbean), 0.7 x 0.5 x 0.2 in (all other buttons) |
| Mounting Hardware Included | 2 countersunk mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (for solid headstock versions) |
| Press-in Bushing Dimensions | 0.35 in outer diameter, 0.24 in inner diameter (fits 0.24 in post) |
