Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 guitar tuning machine delivers precise tuning and long-lasting stability with an upgraded 1:18 gear ratio. CNC-machined components with refined surface treatments and a self-locking drive mechanism ensure a velvet-smooth feel during operation.
Crafted with premium brass posts fitted into the housing, this enclosed tuner maintains flawless alignment and wear-free performance. Permanent lubrication with Schaller special grease provides completely maintenance-free functionality over extended use.
Featuring the innovative stepped M6 flanged washer, it eliminates tilting moments and centers the string post without requiring stepped peghead drilling. Direct retrofit dimensions match legacy M6 models for effortless replacement.
| Brand | Schaller |
| Model | M6 90 |
| Gear Ratio | 1:18 |
| Post Material | Brass |
| Weight | 0.79 lb |
| Button Bore Hole Diameter | 0.17 in (4.2 mm) with 0.14 in (3.6 mm) drive flat |
| Single Tuner Weight with Button (Small/Large) | Metal: 1.27 oz / 1.34 oz (36 g / 38 g), Perloid: 1.06 oz / 1.09 oz (30 g / 31 g), Ebony: 1.06 oz / 1.09 oz (30 g / 31 g) |
| Lubrication | Schaller Special Grease (Maintenance-Free) |




















