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I have been using LMII as my main wood/parts supplier for almost 5 years now. LMII not only provides excellent products, but has been a link for me to gain access to a tremendous amount of expert knowledge and instruction on acoustic guitar building. Thanks for striving so hard to connect the dots for newer luthiers like myself to be able to benefit from the hard earned experience of the pros. I am now starting on my tenth guitar and have sold 6 of them. With each build, I strive to venture to new personal ground and it comforts me to know that LMII is always there and I can depend upon you guys for whatever I need, every step of the way."

- m.o. (Praus Guitars)

Plate Joining Jig

JoiningJigPJJNaZOOMOur “New and Improved” Plate Joining Jig (PJJN) has some slick new features you will enjoy. The unit is self-contained and does not need to be bench mounted. There are holes machined into the base so it can be temporarily clamped to your bench while joining your back or top. Once your plates are glued up, you can create space setting the jig aside while your glue dries. The PJJN is a simple, robust, bolt-together design which can be easily dissambled for storage. The base of the jig is now constructed from non-stick HDPE (high density polyethylene) and the top is protected by high-tech Kapton® tape.

We have used these jigs in our shop for year to join backs and soundboards. The process is simple. Just joint or plane the edge of the board to be joined. Sand it for a perfect fit. Place it in the jig and put the lattice over the top making sure the joint is flat. (1) Lace the lattice and base together and insert triangular tighteners. (2) Gently hammer in till the fit is tight. (3) Allow glue to dry and voila, a professionally joined top or back. We use our LMI FGX glue exclusively for this purpose with great results.

HomepageVIDEOtipsRed75This video by
luthier and instructor Robert O'Brien
demonstrates how to use the LMI Plate Joining Jig.


SKU Product Name In Stock Each  
PJJN Plate Joining Jig for tops and backs Yes $145.74