Instructions for Bass Machine
Installation
Read through all instructions before beginning work.
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1a)
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Make templates out of plastic or cardboard of the outline of the machines.
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b)
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Lay out templates on the scroll cheeks and mark center holes (two on each side).
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c)
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Drill marked holes with a 5-7mm bit.
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2a)
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Make a wood Center Punch by taking a 90mm long dowel and shaving one end to a point.
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b)
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Make a Drill Guide. (This is made out of two pieces of wood glued together.)
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c)
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Diameter of the Center Punch or Drill Guide for use with standard bits is 11mm.
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3a)
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Place Drill Guide on top of the scroll cheek with the Center Punch in it to center the Guide on to
the already-drilled hole.
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b)
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Clamp the (now centered) Drill Guide on to the scroll cheek.
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c)
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If using the K.C. Strings Special Bit, then drill through the first cheek and keep drilling 5-6mm
into the side of the second cheek. The holes are now complete.
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d)
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Using standard drill bits, drill through the first cheek with an 11mm diameter bit, and keep
drilling 5-6 mm into the side of the second cheek. Then take a 15.2mm bit and drill the outside hole
bigger. The holes are now complete.
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4a)
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Bevel the outside of the 15.2mm diameter hole.
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5)
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Repeat this operation for all four holes.
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6)
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Cut the length of the brass machine shank just a little shorter than the depth of the small hole. (So
that the end of the shank is not rubbing against the pegbox hole.)
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7a)
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Install machine shank into the hole with machine faceplate resting on the scroll cheek.
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b)
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Align hole in gear with the smaller hole in the machine plate.
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c)
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Drill 2mm diameter hole 11mm deep (through the holes in gear and plate) into scroll cheek.
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d)
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Repeat steps b and c for all other machine holes.
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e)
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Screw in all screws to attach plates.
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8)
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Spray machines with a little WD-40 and turn handle until machines work smoothly.
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