Posted on July 7, 2024May 21, 2025 by Dale Phillips Nuts and Bolts for Bridge Gluing Nuts and Bolts for Bridge Gluing by Tim Olsen Originally published in Guild of American Luthiers Data Sheet #126, 1979 and Lutherie Woods and Steel String Guitars, 1998 The holes of a pin-style bridge provide a golden opportunity to apply some very convincing clamping pressure. I use 3 10×32 1" round-head bolts with washers, wing nuts, and pieces of drilled shoe sole leather to temporarily bolt the bridge on while gluing. This not only exerts a strong pressure to the back edge of the bridge, but the bolts ensure an accurate alignment of the bridge. All that remains is to set a deep-throated cam clamp on each end of the bridge. The leather washers will take up any slop that the bridge might have. This is a natural for repair work as well as construction. ◆
Posted on July 1, 2024May 22, 2025 by Dale Phillips Questions: Single Fretting Fixture Questions: Single Fretting Fixture by Tim Shaw Originally published in American Lutherie #101, 2010 Mark French from West Lafayette, Indiana asks: Do people ever make a single fretting fixture and just pick off whatever section they need for a specific type of instrument? I started with a 25.5" scale length and added some frets to bump it up to about 34.07". It looks like I can use this set of positions to find fret spacing for everything from a bass to a mandolin. Tim Shaw from Fender in Nashville, Tennessee responds: You could also use this for both medium-scale bass, which is usually 32", and short-scale bass, which is typically 30" or so. Since Leo Fender had the 25.5" scale first, I don’t know if he actually “added” frets to come up with 34", but that was certainly possible on the prototype. The shorter Fender scales were also probably started by lopping frets off a standard neck. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on July 1, 2024May 22, 2025 by Dale Phillips Letter: Thicknessing Router Article in AL#101 – Surfacing Bit Letter: Thicknessing Router Article in AL#101 - Surfacing Bit by John Park Originally published in American Lutherie #102, 2010 Tim, Since the thicknessing router article (AL#101, p. 58) was written, a friend has tried using a 1" surfacing bit. It has blades on the bottom, much like an auger, which seems to have the trait of lifting the wood. I think it has a propeller action that creates a suction problem. In my opinion, using a cutter like that defeats the purpose. A straight bit cuts the end grain and so can disregard runout and figure. There will always be a slight suction due to the velocity of the air over the top surface being higher than the air under the wood. This is Bernoulli’s Principle which is what gives wings lift. I use a 3/4" straight bit and I’ve yet to encounter enough lift to make a significant error at a dimension of about 2MM or .080". Using this device to give less thickness than that could cause problems because the span from the hold-down remains fixed while the stiffness drops as the cube of the thickness. In other words, making veneer would not be practical. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on June 30, 2024May 12, 2025 by Dale Phillips The Great White Sitka The Great White Sitka by Jeffrey R. Elliott Originally published in American Lutherie #32, 1992 and Big Red Book of American Lutherie Volume Three, 2004 In February 1992 friend and fellow luthier John Sullivan and I drove from Portland, Oregon to Elma, Washington to pay a hands-on visit to Steve McMinn’s Pacific Rim Tonewoods, Inc. (The business has since relocated in Bellingham, Washington.) We went for the experience. Steve suggested we bring some rugged clothing and a camera. We discovered why when we arrived to the incredible sight of a gigantic Sitka log 26' long by 11' across at the larger end. A great white whale came to mind. The photos tell the story. For the next couple days, my body reminded me I’d had a real workout. But it felt good because it reminded me of what a great time we had and how fortunate we were to have a hand in turning this huge spruce log into top wood. Steve’s whole operation is very well thought out, very organized, and a pleasant place to work. He’s obviously committed to producing high quality instrument woods and nothing is wasted. This experience also gave me an appreciation for how much work goes into producing one top and why “ideal” tops are so rare. ◆ Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 3 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
Posted on June 30, 2024May 14, 2025 by Dale Phillips Mechanical Compliance for Soundboard Optimization Mechanical Compliance for Soundboard Optimization by David Hurd from his 2006 GAL Convention workshop Originally published in American Lutherie #90, 2007 People say, “You’ve got to make fifty or a hundred guitars before you get it right.” That makes me crazy. I feel that if you can do the carpentry of putting an instrument together and have idea of what it should look like, you can get 80% or 90% of the way there in terms of top optimization with a mechanical compliance approach. I build many sizes of guitars and ukuleles using different top woods. I have developed an easy method of testing the compliance of a top, that is, how far it flexes under a given force, with a simple fixture. Being able to measure and compare the compliance values has proved to be a very useful thing in optimizing these soundboards for the best sound and stability when I graduate the edges of the tops and carve the braces. After building and measuring many instruments, I have developed a mathematical model that does a very good job of estimating what the target compliance measurements should be for a given instrument size and string tension. I have integrated the model into a spreadsheet which you can use by plugging in just a few simple measurements. Become A Member to Continue Reading This Article This article is part of the Articles Online featured on our website for Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 3 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. MEMBERS: login for access or contact us to setup your account.
