|Review by dsb1829||posted 1990 days ago||2414 views||0 times favorited||7 comments|
I picked up a set of the K-body clamp extenders a couple months back from Woodcraft. I had a table project coming up and knew that clamping the long aprons would require clamps in excess of the 50 inchers that I had. I was initially impressed by the solid construction of these. Honestly I think you would get back near half of the price in scrap value on the billet. The bolts are massive. The extrusion is formed to match the contours of the steel rails of the K-body clamps.
Well last night I finally got a chance to put these to the test on the afore-mentioned table. Conversion was quick. Some rails fit the extenders tight while others were loose. Overall everything was stable and manageable once I had bolted my 50in and 24in clamps together. My dry fit was uneventful, but I did notice one leg needed a wedge to hold it at 90. A light should have gone off in my head at this point. Unfortunately I was at the end of about a 14hr marathon shop day and not firing on all cylinders. I glued, reclamped, and in all the fuss to get it all together I missed that my joints were not being held at 90. Close, but off. It wasn’t until a few minutes later when removing the excess glue that I discovered the problem.
I kicked myself and then assessed the damage. Fortunately the error is small. Unless the table is flipped upside down it will never be seen. The angular error is small enough that it is not detectable by eye.
But, be forewarned. The k-body extender does allow your parallel clamps to clamp outside of parallel. If you are going to use these keep a sharp eye on the joint and compensate with shim stock to maintain parallelism. Minus 2 stars for my grief. I will leave it above average because technically they do what they are said to do, combine 2 clamps. In my case I can have up to 100” of clamp length. If when needed again I will be much more careful in the dry fit so I don’t end up with any surprises after the glue is cleared.
-- Doug, woodworking in Alabama