AUTO-TRIM LOCKING TUNING MACHINES

The D'Addario Auto-Trim Locking Tuning Machines are precision tuners that eliminate the need for multiple windings and automatically cut off the excess string during string changes. This eliminates the need for string clippers making string changes easy and fast. Simply insert sting, tighten clamp, and tune to pitch. The 18:1 ratio worm gear constructions ensures greater precision than standard tuners and ensure tuning stability even during the hardest playing. Includes 6 tuners and mounting hardware.

High quality precision tuners that automatically cut excess string during string changes
Individual string clamps securely hold the string in the tuning machine, avoiding the need for multiple wraps around the post
Precise 18:1 gearing ratio for smooth, exact tuning with minimal string slippage - diameter of tuning post 0.375"
6 In-line, chrome
A Ned Steinberger design

TUNING MACHINE INSTRUCTIONS

TOOLS NEEDED
• ½” (12.7mm) Nut Wrench
• 1.5mm Drill Bit and Drill
• Small Phillips Head Screwdriver

BEFORE STARTING
• Read the instructions in their entirety.
• Ensure that your instrument’s headstock has a 10mm hole
for the tuning post.
• Pilot holes are required for the small mounting screws.
We recommend a 1.5mm pilot hole with a 6mm-8mm depth.
• If you have any doubts about your ability to install the tuning
machines, please refer to a professional luthier for installation.

INSTALLATION
1. Remove existing tuning machines if present.
2. Insert the tuning machine though the hole in the headstock
and align to the desired position.
3. Mark position of mounting screw and drill 1.5mm pilot hole
with a 6mm-8mm depth if it does not align with existing hole.
4. Once tuning machine is in position, gently push with thumb on
the back of machine to make sure it is flush against headstock.
5. Apply washer and nut to tuning machine post and tighten by hand.
6. Further tighten nut using wrench or nut driver until secure.
DO NOT OVER TIGHTEN.
7. Place mounting screw through the tuners eyelet and tighten.
Screw should tighten with minimal effort. STOP TIGHTENING AT
ANY SIGN OF RESISTANCE AND RE-CHECK DIMENSIONS OF PILOT
HOLE. DO NOT FORCE SCREW AS IT COULD STRIP OR BREAK.

Back to my Product information