IntroductionI purchased my Leigh 1258-24 dovetail jig about 15 years ago and have upgraded it to function identical to a Leigh D4. The key feature of the Leigh 1258/D4 dovetail jig is its ability to machine variable or equal-spaced, symmetrical and asymmetrical joints. Also, the Leigh offers very fine control of joint fit. I use our Leigh primarily for through dovetail joints. I have used the Leigh for half-blind dovetails, but I generally use our dedicated half-blind jig (PC 7116 Omnijig) or the AKEDA DC-16 for machining drawers and other "boxes" requiring the half-blind dovetail joint. The Leigh dovetail jig has gone through some incremental changes over the years including adding the cam-action handles for the clamp bars, improved template holders, and perhaps the most important change, the new support edge guides. The original guide blocks, (used to align the sides of workpieces in the jig) were small and made of plastic. They were a problem to align perfectly and did not always provide satisfactory support. The new Leigh D4 edge guides are cast metal with adjustable edge pads. They provide a large support area and are much easier to adjust. Thanks to Leigh's modular design, you can retrofit older jigs with these new components as I have done. If you have the older jig and make the retrofits, make sure you purchase the new "D4" manual as well as the original manual will be obsolete. I have received many emails that border on hate mail because I have not declared the Leigh dovetail jig as the best, the king, the jig without peers. I doubt few if any of my "detractors" have used their Leigh as much as I have used mine. I like the Leigh a lot. I have used it for many years. And yes, machining through dovetails is very easy with the jig. However, there are other jigs that compete with and, in some areas, beat the Leigh jig. My advice in regards to choosing a dovetail jig is ask to yourself what features you require/want--then find the jig that best matches those requirements. I have compiled a comparison article that weighs the features of the AKEDA, Leigh, Keller, and PC 7116 Omnijig dovetail jigs. A few readers have responded that I have sleighted one or the other. Judge for yourself. You can produce excellent results using any of these jigs (AKEDA, PC 7116 Omnijig, Leigh, and the Keller). Which one is right for you? It depends on how often you plan on using the jig, what style of joints you plan to machine, what amount of setup time are you willing to spend for each project, what dovetail layout do you want to employ, etc. Luckily, I am in a position to choose the best jig for the project at hand.
What I Like About the Leigh Dovetail JigEasy to Install and Setup Infinite and Variable Spacing (Layout)
Through Dovetails Are A Piece of Cake Machine 1/4" Box Joints One Template Does It All Hairline Cursors on Template Ends Handles a Wide Range of Work Piece Widths and Thicknesses Great Manual and Support Inexpensive Router Bits D4 Features are Retrofittable What I Don't Like About the Leigh Dovetail JigTear-out The Leigh instructions and dozens of users have suggested ways to eliminate tear-out. Most suggestions don't work. Suggestions that don't work include applying packing tape and pre-cuttting the wood fibers with a marking knife. Methods that help include making a left to right incise cut (this reduces front tear-out), using a backer and fronter board, proper technique, and sharp cutters. Woods like pine and oak tear-out more than walnut, poplar, and maple. Forget plywoods other than Baltic-birch and Apple-Ply for through dovetails. I have many hours on the jig and I still get tear-out. For awhile I was so upset with the tear-out, I began machining through dovetail joints on the bandsaw. I also do them by hand for simplier projects (thanks to Frank Klausz.) But you can't beat a dovetail jig for speed. It's One Work Piece at a Time Half-Blind Dovetail Setup Infinite Spacing is Great, but... You'll Need the Manual Guide Bushings The Bottom LineThe Leigh is an excellent dovetail jig. An excellent woodworking investment. I like the Leigh dovetail jig for machining through dovetail joints. I don't like it for machining half-blind joints. In fairness, many Leigh users have no problem machining either type of joint with the jig. For my money, it was worth it to purchase a dedicated half-blind dovetail jig like the PC4112 and the PC 7116 Omnijig. For through dovetail joints, the Leigh offers advantages over the Keller and other similar jigs--primarily because of its infinite variable spacing capability. The trade-off is the Leigh is slightly more difficult to setup and use, and it is restricted in width capacity (24" maximum). And this is where the Keller shines as it could not be easier to use, does not require test cuts, and has no practical width limits. So what is the bottom line? In the past I always said that if you wanted the absolutely most versatile dovetail jig, purchase the Leigh. If you want the easiest jig to setup and use, purchase a dedicated half-blind dovetail jig and the Keller through dovetail jig. But with the arrival of the AKEDA DC 16 dovetail jig, things are a bit more muddled. I have used the AKEDA DC 16 dovetail jig extensively. Like the Leigh, it produces through and half-blind dovetails, variable-spaced, symmetrical, or asymmetrical. However, its design makes dovetail layouts simpler than the Leigh, and has added features such as dust collection, one handed clamping, and so forth. I came up with a comparison chart of features and a weighted rating scale that might help decide between all of these excellent jigs.
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A Few Suggestions - Notes
Template Guide BushingsGuide bushings (also known as collars or a guide bush) are extremely versatile and indispensible for many router operations. However, I have learned the hard way that guide bushings can be a source of fit problems when used with dovetail jigs, especially combination jigs like the Leigh and the AKEDA. I have found two common problems with guide bushings:
To determine whether your bit is centered in the guide bushing, simply lower the bit into the bushing, rotate the bit, and look to see whether the tips of the bit are centered within the bushing for an entire rotation. Since a dovetail bit is angled, you can lower it into the guide bushing until it barely touches--just make sure to rotate it backwards. Or, better yet, perform the following:
Machining Through DovetailsMachining through dovetails using the Leigh or Keller is a piece of cake. The procedure is as follows:
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Alternatives and Other JigsDon't discount making through dovetail joints by hand or the hybrid method employing both the bandsaw and hand. If you're not doing a ton of through dovetail joints, doing them by hand makes sense. If you're a novice at making through dovetail joints by hand, buy or rent the Dovetail a Drawer video by Frank Klausz. Actually, this video teaches alot more than just dovetails. I found his general woodworking techniques to be very enlightening. I came up with a chart comparing the Keller, Leigh, AKEDA, and PC Omnijig dovetail jigs. Click here to view it. Here is a run down of Dovetail jigs you might consider:
QuestionsIf you have any questions, E-Mail Us! |