Corbin Guitar Repair

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Corbin Guitar Repair[edit]

Problem[edit]

An acoustic guitar with a broken bridge. Bridge was cracked in half.

Repair Plan[edit]

  • Repair broken bridge
  • Sand/cleanup guitar top under bridge.
  • Re-Glue Bridge
  • Setup

Engineering Log[edit]

2020.0207[edit]

  • Belly Measurement - 5/32" on the sides. ~1/16" too tall (1/16" recommended). Potentially over-humidified.
  • Neck Relief (Capo at 1st fret, fretted at 14th fret, measured at 6th fret with feeler gauges. Looking for .010" relief)
  • Adjusted so low E is almost to .010. High E is lower. Indicates neck warpage. It's close as its going to get.
  • Saddle Height (capo at 1st fret, measure at 13th fret; aiming for .100" clearance for Low E, .075" at high E)
  • Had to lower saddle to its lowest possible setting. Then raised to avoid string buzzing. Belly needs to be reduced to achieve a normal saddle height.
  • Nut Height - Lowered nut slots. D and G were lowered too much, now those strings buzz when plucked open. Need to rebuild the height on those slots.

2020.0206[edit]

/ Dunlop Formula 65 Guitar Polish] to top, back, sides, headstock, and neck.

  • Installed D'Addario Phosphor Bronze [[1]] Light Gauge
* .012" / .3 mm / 23.36 lbs / 10.60 kg
* .016" / .024 mm / 23.31 lbs / 10.57 kg
* .024" / .61 mm / 30.06 lbs / 13.63 kg
* .032" / .81 mm / 29.93 lbs / 13.58 kg
* .042" / 1.07 mm / 28.93 lbs / 13.12 kg
* .053" / 1.35 mm / 24.95 lbs / 11.32 kg

{{ ::img_20200203_191539.jpg?400|}} Img 20200203 191547.jpg?400 Img 20200203 191539.jpg?direct&400

2020.0204[edit]

  • Glued bridge to body using wood glue. Golf tees were used to hold the bridge perfectly in place for clamping.
  • Applied clamping force using gobar.

Img 20200203 191539.jpg?400

2019.1012[edit]