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Banjo B4 D-Tuner

Banjo B4 D-Tuner
From €99.90 *

Prices incl. 19% VAT (only European Union) plus shipping costs

Delivery time approx. 10 days

Please configure your desired product in the order, starting from the top with the color.



We hereby declare that cancellation law shall not apply to contracts pertaining to the delivery of goods which are not ready-made like these, nor shall it apply to products which are manufactured according to the customers express wishes or specially adapted to the personal needs of the consumer and single tuners.
I have read and understood the information/ links in red and I know what a left and a right machine head/tuner is and I know that the length of the post is measured according to the pictures shown here from the bottom of the housing to the center of the hole for the strings.
  • 10420100.75.72
Banjo tuning peg with D-Tuner-function The Schaller Banjo B4 D-Tuner is a tuning machine... more

Banjo tuning peg with D-Tuner-function

The Schaller Banjo B4 D-Tuner is a tuning machine with inbuilt stops, that allows banjo players to preset two different tunings while playing. They are delivered as a set with two different string axes. The pitch of the string can be changed by half a tone on the thin post, and by a whole tone on the thick post. By means of knurled screws, the up- or down-tuned notes can be fixed to the tuning machines housing.

Installation and use explained on a 5-string banjo 

5-String Banjo Peghead Open-G Bluegrass Tuning

The most common 5-String banjo tuning in bluegrass music is open G (5th: G, 4th: D, 3rd: g, 2nd: B, 1st: d). Of course, there are further banjo tunings.
Exchange your standard banjo tuners on the second and third string position against our B4 D-Tuner set. The D-Tuner with the thick string post (whole tone detuning), is mounted at 2nd position and tuned in B. The tuner with the thin post (half tone detuning), is mounted at 3rd position and tuned in g. If the peghole is too small, it is recommended to enlarge the diameter to 3/8″ (9.9 mm). Use as peghole reamer to avoid splinters on the surface of the wood, or have the machine heads installed by an experienced luthier. Attach the tuner with the hexagon nut and washer that the two side knurling screws can conveniently be reached when tuning.

Regular tuning mode

First loosen the tight thumbscrews (Nickel, BlackChrome) counterclockwise a half turn. The D-tuners now work in standard tuning mode and can be tuned regularly. Once the banjo is tuned (G/D/g/B/d), and the thumbscrews are loosened, the bending stops can be adjusted.

D-tune mode: setting the high and low stops

Tighten the g-string (3rd) with the nickel thumbscrew (lightly with feeling). Then tune down to F# with the peghead, exactly on F#. If the tuning is too low, go back to g, tune exactly to F# again and fix the black thumbscrew. Now you can detune with the tuner knob, to bend between g and F#.
Tighten the B-string (2nd) with the nickel thumbscrew, lightly with feeling. Then tune down to A with the peghead, exactly on A. If the tuning is too low, go back to B, tune to A again and fix the black thumbscrew. Now you can detune with the tuner knob to bend between B and A.

Two player settings: Return to starting position or remain down tuned

If you want to return from the down-tuned position back to the starting position immediately while playing the banjo, then loosen (if locked) the tuner button screw counterclockwise a whole turn around. The spring in the tuning mechanism returns to the initial position, once it's released again.
If you don't want the action to return to its original position from the down-tuned position, and you want to reset the bending by hand, you can hand-tighten the tuner button screw. The spring mechanism it locked, and the tuning peg remains in the selected position.

Please note

  • For accurate tuning, always set the high tone on the nickel thumbscrew first, then the low tone on the BlackChome screw.
  • If you want to disable the detune function, just loosen the two thumbscrews of each tuner, and they will work like regular tuning machine head. 
  • Never force the tuning machine heads beyond the tightened stops of the knurled screws, otherwise they will be irreparably damaged.
  • To minimize friction against the strings when tuning up and down, the nut slots must be free and passable, the strings must not jam. The slots can be lubricated with the tip of a soft pencil.
  • D-Tuners can be installed on other headstock positions, as well on electric or acoustic guitars with a solid headstock. Please consider the technical details when installing. Maximum string gauge of the thin and thick post is 0.039″/1.0 mm.
  • The thumbscrews on banjo D-tuners from other manufacturers, may be arranged differently in the color code.

Technical specifications

  • Gear ratio: 1:4
  • Weight: approx. 60 Gram
  • Finishes: Nickel, BlackChrome and Gold
  • Tuner buttons: Perloid, Galalith, Perloid Black
  • Maximum string gauge: thick and thin string post (axis, spool), each 0.039″ (1.0 mm)
  • Peghole diameter: 3/8″ (9.9 mm) required, if necessary, the pegholes should be reamed to the proper size by a luthier
  • Peghead thickness: suitable for 1/2″-3/4″ (13-19 mm)

Scope of supply

  • 2 × banjo machine heads with different posts 
  • 2 × threaded bushings
  • 2 × washers

All sealed tuners are permanently lubricated with Schaller special grease and are therefore absolutely maintenance-free.
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.
We supply 2 pieces with two different string posts to choose from. One of them allows you to alter the pitch by a half a tone (thin post) and the other means you can alter it by a whole tone (thick post).

Technical drawings (without engagement)

PDF file download » technical drawing Schaller Banjo B4 D-Tuner