As a violin is played over an extended period of time, the bow strings become worn, dirty and loose. When this happens, the bow will not be able to bite into the strings. This results in the bow sliding ineffectually over the strings, making very difficult for the musician. Rehairing your violin bow solves this problem. Violin bows should be rehaired at least once a year or whenever they need it.
Rehairing tools include bow rehairing jigs, hair gauges, pointed awls, wedge drivers, mortise chisels, straight chisels, putty knives, tablespoons, slip-joint pliers, diagonal pliers, scissors, fine-toothed combs, alcohol lamps, hardwood cutting blocks and rattail files.
Violin rehairing involves a large number of adjustments. A short list includes cleaning the bow stick, repairing a fractured tip wedge mortise, re-bushing a damaged frog mortise, replacing or refitting the ferrule and grafting a tip that has been separated from the stick.
The most important tool needed to rehair violin bow is a bow rehairing jig. This device steadies the bow for rehairing work. They typically work for all sizes of bows. As of March 2011, bow rehairing jigs typically cost between £39 and £45.
Bow rehairing takes considerable knowledge of rehairing tools, skills and practice. It is thus not recommended that amateurs attempt to rehair their own bows, doing so could result in severe bow damage. Take your violin to a professional for rehairing. This will save you time, effort and the cost of replacing a perfectly good violin bow.