Since I was able to do 57 of these and knowing my lack of skill in such matters there must be some leeway. Put it this way: if the geared peg diameter is too large by even the tiniest amount it will not work and if the Wittner protuberance or the Knilling/Peghed screw on the peg gets into the peg hole by more than 1 mm you maybe into the trouble region because you want as much of the pegbox wall engaged supporting the peg as possible. 0.02 mm might be a better guess still < 1 mm. That section is a protuberance on the Wittner that creates a small slot in the pegbox wall for the Peghed and Knilling it is screw that threads into the pegbox wall. I wrote "less than." I just did not want to calculate how much less, but it would be based on the angle slope of the peg shaft and the length of the "tolerant" section of the geared peg. The pegs for violas and violins are the same (at least they work in both instruments).Īndrew Victor Edited: July 21, 2019, 12:07 PM I've since installed a couple of sets of violin Wittners too. Pegs on a well-used instrument are unlikely to last 100 years nor are original peg holes likely to get much older than that without re-bushing (I had one experience of that too). I don't think anyone buys a fiddle like that for the pegs. The first tool you need before ordering geared pegs is a micrometer capable of measuring your current peg diameters AT THE HOLE! Or you can have a pro do the whole job and be away from your fiddle for a week or more.Ī friend of mine had Pegheds installed on his Enrico Rocca violin (a $150,000 fiddle) by the best-know San Francisco luthier a few years after I had installed Pegheds and Knillings in most of my (and family's) instruments (I would certainly not cut into such an instrument myself.) He was concerned that his original pegs could be replaced - especially now that he has stopped playing and will try to sell the violin. I've gear-pegged 14 instruments myself (57 pegs, one was a 5-string violin). I would guess that the chance of a pre-manufactured geared peg fitting a random peg hole at less than 10% no matter how well you can measure your peg holes (not all peg-hole diameters will be the same on an instrument that has significant use). I would estimate that the leeway in peg diameter for a utile fit is less than one millimeter (1mm) - much closer tolerance needed for a good fit. With a geared peg there is a very small region of the peg length that MUST be in contact with the pegbox wall. That's when rebushing of the pegbox is required. Wittner pegs obviate the adhesive by having a tooled shaft.Ī perfectly formed wooden peg can fit a range of peg-hole diameters - it just sticks out more with a smaller hole and sinks in further with a larger hole - until the peg's shoulder contacts the peg box. Both Knilling Perfection Pegs and PegHeds recommend a tiny drop of urethane adhesive. Wittner FineTune pegs are a good choice because they do not require any adhesive. One bum twist with that nice brand-new razor-sharp reamer and your pegbox will require far more than $100 worth of work. Luthier fee for installing these pegs will be typically less than $100. Most importantly, do NOT do this yourself. I mean, can you really imagine yourself doing that, knowing how well your gear pegs work? He further claims that not a single customer has ever asked him to put the old pegs back in. In that case you would just get a new set of traditional pegs.Ĭhuck Herin, the proprietor of PegHeds, claims to have installed hundreds of sets of his pegs at his shop in Columbia, South Carolina (USA). Still, it's enough that your original pegs may not fit properly again. However often the amount of material removed is extremely small. It's rare that the luthier would not use the reamer at all to fit your gear pegs.
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