Schaller GrandTune User manual

hypertech tuning
vintage design
GrandTune
®
Installation:
Please align and drill perpendicularly from the back
of the headstock assuring a perfect 90º angle of the
drill hole.
The peghole should have a diameter of 6 mm.
Do not drill perpendicularly from the top down as
you may be working on a slightly tapered headstock.
On a tapered headstock drilling from the top down
may result in your tuner’s backplate to be tilted and
having to be forced into place by the fi xation screws
subsequently bending the tuner’s stringpost out of
line. See page 3 vs. page 4
Do not bend the base plate, the worm gear will be
irretrievably destroyed.
Thank you for choosing GrandTune tuners -
the most advanced and musical
machine heads ever built.
– 2 – – 3 –

– 5 –– 4 –
Use original Schaller GrandTune bushings only!
Do not use bushings of other or unknown origin.
Only genuine Schaller GrandTune bushings provide
the specs and performance to ensure the velvet-like
feel and fl awless performance GrandTune tuners
are known for.
Please be aware that only GrandTune bushings
feature a precision inner diameter of 6.10 mm.
Bushings diff ering from this spec can degrade or
even damage your GrandTune tuner’s performance.
Note:
Old bushings should not be left in the guitar’s
headstock when upgrading to Schaller GrandTune
tuners.
GrandTune bushings require counterbore holes
concentric to the pegholes with a minimum
diameter of 8.33 mm and a depth of 6.10 mm.
*
When correctly installed the bushing will conceive
the stringpost eff ortlessly with the backplate of the
tuner fi tting fl at against the back of the peghead.
*
We recommend using Stewart-MacDonald’s (www.stewmac.com)
peghead bushing reamer (#2061) and tuner drill jig (#4858).
GrandTune featuring 18:1 Velvet-Tec technology.
Available as single or 3-on-plate, for solid or
slotted headstock steelstring guitar as well as
classical guitar, ukulele and mandolin.
Combine 8 exceptional fi nishes with more than
10 exquisite tuning buttons.
© 2021 Schaller GmbH
www.schaller.info
GrandTune
®