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BIRT Repair Processes Glossary
RTC BIRT Glossary of Repair Processes 2011-2012
25
Other
Professional
09/12/2011

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Term
banding
Definition
The process of installing metal or carbon-fiber bands on wood body instruments to close and seal cracks.
Term
buffing
Definition
The act of producing a luster on musical instruments. This is accomplished by using layered cloth wheels and selected buffing compounds.
Term
burnishing
Definition
Process of removing small dents, scratches or other surface imperfections on metal and occasionally wood instruments. For thin walled tubing the metal is squeezed between a "burnisher" and a metal mandrel.
Term
chemical flush
Definition
A process for cleaning, preserving, and sanitizing metal instruments.
Term
corking
Definition
The act of installing cork for the purpose of regulating woodwind key mechanisms and the seal of assembly joints.
Term
counterbore
Definition
The process used to face a round hole, in order that a "bolt" (pivot) may set square with the hole; or to enlarge a hole to a given depth, as for shoulder pivot screws.
Term
countersink
Definition
The process used to enlarge the end of a hole to a cone shape, as for tapered pivot screws.
Term
degreasing
Definition
Any application of solvent to remove residue from instruments prior to lacquering or plating. Can also refer to the cleaning or buffing of dirt from keys and parts.
Term
lapping
Definition
Process of fitting two telescoping parts together using an abrasive compound to insure roundness and true fit.  // To work two surfaces together with an abrasive until a very close fit is produced. Usually used to fit piston valves when new or replated.
Term
overhaul
Definition
The complete reconditioning of a musical instrument.
Term
pickle
Definition
A strong acid solution used to remove scale, corrosion, lime, and silver solder flux from only non-ferrous metals. NOTE: Aluminum cannot be cleaned in this manner. The solution is usually muriatic acid and water (50%- 50%).
Term
plating (process)
Definition
The electrochemical process of depositing a film of a more durable or a more noble metal on a basemetal.
Term
playing condition (PC)
Definition
A term used to indicate only necessary repairs required to bring an instrument into good playing condition.
Term
polishing
Definition
A complete wipe-down of an instrument after final handling. Can involve the use of oil-cloths, abrasive polishes, and spray cleaners depending on material and finish.
Term
ragging
Definition
A hand buffing process used to reach inaccessible areas.
Term
repad
Definition
The operation of installing new pads on woodwinds.
Term
scratch brushing
Definition

Old Meaning: Restoring luster on satin silver plated instruments with soap bark and soft scratch brush wheel. //

Modern Uses: Removing surface imperfections from valve casings, rotary valves, and solder joints.

Term
soldering
Definition

1a. Soft _______: A tin/lead, low melting point solder used with a flux. Most commonly used to join the various parts of metal bodied wind instruments. (Regular) //

1b. Soft ______: A tin/silver, low melting point solder used with a flux. Most commonly used to join the various parts of metal bodied wind instruments. (Lead-free) //

2. Silver _______ or Brazing: A silver/brass high melting point solder used with a borax-based flux. Most commonly used where a strong bond is required, i.e. woodwind key, brass work & bells.

Term
spinning
Definition
An operation used in the manufacture of brass instruments whereby the metal is "spun" with a burnisher over a mandrel turning on a lathe.
Term
spot lacquering
Definition
Refers to the process of buffing, degreasing, and spraying of small worn areas or heat-damaged sections from soldering.
Term
spot plating
Definition
The process of applying selective plating to a small area with the use of equipment designed for this purpose.
Term
strapping
Definition

1. Process similar to ragging, except strips of emery cloth, 320 paper, 400 paper, or 600 paper can be used. //

2.Machine ______- Belt sanding machine used in high production shops.

Term
stripping
Definition
The operation by which old lacquer or epoxy is removed from an instrument. May be in the form of a hot strip (caustic) or cold strop (preferred). Also, plating can be stripped from base metal electrically or chemically.
Term
thread chasing
Definition
The repair of damaged threads on valve caps and casings of brass instruments and occasionally post threads of woodwind instruments with the use of dies and taps respectively.
Term
tinning (process)
Definition
The act of applying a film of solder to a part, before joining to another part. Most useful when dissimilar metals are to be joined.
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