This weekend saw another major milestone reached for the Roubo bench build. The benchtop is completely flattened, and I’ve applied a finish to the bench (more on that later). While there is plenty left to do before the bench is complete, it is now functional as a workbench, which means that I can use the bench to finish the last elements of the build.
As predicted in my last post, jointing the bench top did not take too long, and the top is (for now at least) flat to 0.005″ over 24″ in any direction. Which is plenty flat enough for my work, and gives me a good basis for flattening the top when it moves in six months or so. After jointing the top I smoothed it with my No.3 smoothing plane. Keeping track of which elements you have worked on such a large surface area can be challenging, and so I hatched across the entire bench top with a lumber crayon. Overlaping strokes with the smoothing plane removed the crayon, and so I knew at any time where I still needed to plane. For each complete pass with the plane, I re-hatched the top, and worked the whole surface again.
Te middle of the slab contains some pith, and the grain direction changes on each side of the pith. I therefore found it necessary to work in opposite directions from each side. The purpose in smoothing was mainly to remove the tool marks from the previous flattening operations – you could potentially skip this step if you wanted. While I wanted to remove most of the tearout, I’ve been pragmatic and not worried about removing every last spot as that would require taking a vast amount of material off the top and risks taking it out of flat. And after all, it is a workbench which will take a lot of abuse over the coming decades.
Once the top was flat and smooth, I prepared it for applying the finish. This consisted of a number of small tasks. First I chamfered the top corners of the slab with my Philly Planes boxwood chamfer plane. Secondly, I taped up the two areas I do not want to get finish on – the top of the leg vise, as I will be gluing crubber to the vise jaws, and the recess where the plaque engraved by Jenny Bower will be glued. I also vacuumed any debris lodged in the splits in the top, so that these did not absorb finish. As a final step, I did a sweep around the undercarriage joinery to remove any squeeze out that had survived gluing up the bench last month. The Benchcrafted Skraper is perfect for removing dried glue without damaging the underlying surface.
With the bench prepared, I ragged on a coat of Boiled Linseed Oil. This is a good solution for finishing benches, as it is dirt simple to apply, does not create a slick surface (I want my workpieces to stay still, thank you very much), is easily applied and maintained, and will prevent glue from sticking to the benchtop. Thirty minutes later I wiped off the excess, and now the bench will sit over the Christmas break while the oil cures. The only jobs left to do before the new year are to fit the plaque and also install the Benchcrafted Swing Away seat.