Schaller Guitar Machine Heads ST6K G-Series Deluxe KeyStone

Replacement machine head with 2-screw and banjo bolt as counterfort.

Schaller’s new and improved Keystone tuning buttons feature vintage original specs along with that classic look and feel. Designed to match contemporary as well as historic guitar styles. Available in single-ring and double-ring versions (SR + DR).

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.

All string posts are made of high-grade brass and fitted into the housing with utmost precision, ensuring the best possible tuning accuracy and wear resistance.

Instructions Toplocking screw:

• Unscrew the knurled screw on the adjusting axis anti-clockwise until the clamping ball comes off.
• Now press the strings against the clamping ball. Under pressure, it recedes. You can now put the guitar string through the adjusting axis.
• Screw the knurled screw clockwise until it is hand tight. The string is now secured by the clamping ball.
• Now you can tune your strings.
• Now featuring a metric thread and a specially developed screw locking device, so you don`t lose the screw anymore!
• When loosening the screws, turn them anticlockwise until the string is tightened into position.
• When removing the connecing screws completely  from the shafts, simply take the connecting screw out of the shaft at threshold resistance.
• The Schaller Toplocking with fine pitch thread and pull-off locking screw.
• Fine Pitch Thread for better locking adjustment.
• Our new Toplocking screw with fine pitch thread allows the screw to be turned more precisely and the locking torque to be adjusted more accurately.
• New pull-off mechanism that makes pulling off as easy as putting back on
• To prevent the toplocking screw from coming off and getting lost in the process of string changing we designed a new mechanism keeping the loosened screw in place even when it is completely unfastened.
• To remove the Toplocking screw entirely from the string post just pull it off firmly. To put the screw back on just turn clockwise and tighten lightly.

technical specification

gear ratio 1:16, weight 32g (DR/Toplocking), 31g (SR/Toplocking), 29g (DR, solid 21,7), 28g (SR/solid 21,7) per piece

scope of supply

6 threaded bushings, 6 step washers, 12 mounting screws

technical drawings (without engagement)

Our technical drawings show just a sample of buttons and posts. You`ll find the technical details of our posts by using the configurator chapter „posts“.