Elegant and light machine head for electric basses: locking & non-locking

Experience the lighter side of heavy duty. M4 90 – legendary Schaller quality at a stunning 40% less weight. Its specs, looks and superior performance define this tuner as a true no-compromise when it comes to weight reduction.

Special features

• A special female screw guarantees precise positioning and fixing of the shaft.
• High gear ratio of 1:20 ensures a very precise tuning.
• All sealed tuners are lubricated with Schaller special grease for lifetime maintenance-free service.
• All parts are precision-crafted and surface-finished, the self-locking drive ensures an even, delicate and steady tuning.
• 2 different strings posts to choose from: non-locking (splitted) & locking (solid) - please select via the configurator.
• All string posts are made of high-grade Pure Sound Brass and fitted into the housing with utmost precision, ensuring the best possible tuning accuracy and wear resistance.

Technical specifications

• Gear ratio: 1:20
• Weight: 62 g per piece including threaded bushing
• Screw lug: at a 90° angle to the button

Scope of supply

• 4 x threaded bushings
• 4 x washers
• 4 x mounting screws: M2.2 x 9.5