Schaller M6 90 Guitar Tuning Machine
The Schaller M6 90 tuning machine combines legendary design with modern engineering, featuring an advanced 1:18 gear ratio for exceptionally precise and smooth tuning stability. Built with high-precision CNC-machined components and surface-finished parts, it provides an even, sensitive, and reliable operation. High-grade brass posts are precisely fitted into the housing to guarantee wear-free performance and optimal durability.
Equipped with Schaller's innovative stepped flanged washer, this tuner allows straightforward mounting without the need for a stepped headstock hole. The 0.4 in (10 mm) base step centers the string post through the banjonut, eliminating tilting moments and relieving stress from both the post and the rear mounting screws. Each enclosed unit is lubricated for life with specialized grease for completely maintenance-free service.
Designed with identical installation dimensions to its predecessor, the M6 90 serves as a direct drop-in replacement that requires no headstock modifications. This versatile tuning machine accommodates solid or slotted headstocks and offers multiple locking and post configurations to fit demanding professional setups.
| Gear Ratio | 1:18 |
| Weight per Single Tuner with Button (Small/Large) | Metal (1.27 oz / 1.34 oz), Perloid (1.06 oz / 1.09 oz), Ebony (1.06 oz / 1.09 oz) including banjonut |
| Button Borehole | Diameter 0.17 in (4.2 mm) with 0.14 in (3.6 mm) driving surface |
| Brand | Schaller |
| Product Type | Guitar Tuning Machine |
| Post Material | Brass |
| Lubrication | Schaller Special Grease (Permanently Lubricated) |
| Stepped Flanged Washer Diameter | 0.4 in (10 mm) |
| Item Weight | 0.79 lb |
