With shop life resuming some vague semblance of normal after late winter and the presence of Li’l T on the scene, I’ve been able to return to working on the Ultimate Portable Workbench. I’ve now reached the stage where I need to layout the holes for the vise screws, and for the holdfasts as well. You see, I’ve decided that even though this is a portable workbench where low weight is among the highest goals, a set of holdfasts can be a much-valued addition. Hence, my exploration of wooden holdfasts. More about that next Wednesday.
For now my main objective was to locate the holdfast holes so that I could add some backing blocks to the insides of the top and bottom plywood skins. This started by just arbitrarily selecting the locations and marking out the centers of grid boxes and drilling 3/4″ holes.
I then clamped the second skin to the underside of the half-constructed torsion box in order to simply use the holes in the first skin to drill the holes in the second skin.
With that step accomplished I marked the grid pattern on the underside of the second skin so I knew where to put the backing blocks. Once again I used T3 adhesive, in part because I had a lot on hand and because I could not always be sure of the environment for the bench.
Once the blocks were secured I just used the holes in the skin to guide the drilling of the holes through the block. This process allowed me to get perfectly aligned upper and lower collars in place so that holdfasts could be used in this feather weight bench.
Once that was finished I set the second skin aside and moved on to the threaded holes for the vises. I had already glued backing blocks in those locations.
I drilled the holes through the apron and the grid using a combination of drill bits to accomplish the desired ends. The hole in the apron was 7/8″, in the grid web the holes were 1″ to accommodate the 1″ vise screws.
Fortunately I have a set of extra large taps and dies, rescued from the trash eons ago, so making the matching threaded openings was a snap.
While at my daughter and son-in-law’s house recently knocking off a ton of piddling little jobs I took the opportunity to use and revise my cypress planing board/bench top from a couple years ago.
One thing I did to the board was add another planing stop to the bare end of the bench. It was just a simple thing, an oak board with a couple slots cut into it and a tightening screw for each slot so the board could be raised or lowered as needed.
Along the long sides I moved one of the shooting shelves up and skewed a bit towards the flat top so that it would serve me needs more satisfactorily. I’m doing almost all of my work with either a block plane or a small jack plane so there was no need for a really deep shelf distance from the top. The other shelf was removed altogether and turned into a really low-tech Moxon vise using bolts and handles from the local hardware store. Not robust enough for hard daily use but certainly enough for my needs, or so I thought.
After a few days of using it I decided to step it up a tad. I replaced the old narrow shelf/jaw with a new piece of 5/4 x 1-3/4″ cherry, affixed to the top with two 1./2″ NC bolts embedded with epoxy into two “T” handles. Sure, it is not as functional as a full-blown Moxon but more than sufficient for light duty on-site work. The jaw is purposefully off-set 1/4″ below the bench top to provide another shooting shelf.
As I mentioned earlier I was able to use a small Woodcraft holdfast on the bench top with great success. I ordered some more of them but they were beefier than the previous ones and I thought they were too much for this little work station. It was then that I heard the sound of my palm smacking my forehead with the recollection of the first minute of Mike Siemsen’s fabulous video on woodworking without vises.
So I asked myself, “Self, could a useful holdfast be made from, you know, wood?” So, in keeping with the unofficial title of the barn, The Proof of Concept Place (h/t my pal John H) I gave it a try. Using a piece of 2x literally from the kindling barrel and a piece of dowel from the scrap box I drilled and glued them together, then shaped the assembly with the band saw and a rasp.
In action it was astounding! To be sure I need to reorient the grain of the arm to eliminate as much of the short grain as possible, but the performance of the scrap wood holdfast had me gobsmacked. I will blog about step-by-step making the real one in a couple weeks.
PS my new best buddy “Li’l T” made it home last night after nine harrowing days in the Neonatal Intensive Care Unit. Prayers of rejoicing abound coast-to-coast in thanks for God’s providence and the medical magickery. He is home and in the loving arms of his parents but is more than a little fussy; I think he might have heard me comment on the true inflation rate (~17% if calculated with the same formula as 45 years ago) and his share of the national debt his predecessors have hung around his neck. That would crank up anyone. Gotta be careful what I say within earshot of the little guy.
During a recent visit to keep our daughter company (read: fuss and spoil) while her husband is away on travel as she approaches her “due date,” Mrs. Barn and I undertook a number of little projects around the house, things they have just been too busy to address while renovating their “fixer upper.” In order to provide myself the maximum capability given the circumstances (being military and spending every available minute on house renovations my son-in-law is not able to have a dedicated workbench. Yet. But I have plans…) I grabbed my bench-top raised planing board to use on top of his garage work table, along with my “traveling kit.” about which I will post soon.
To this point back at the barn I have used the planing board as little more than an elevated work surface, not insignificant but certainly not exploiting its capacity to the maximum. I was recently inspired by a video from Tamar over at 3X3. This is perhaps the most elegant and high-function solution to the problem of auxiliary/bench-top work station I’ve seen. Ever since seeing the unit built by my friend WilliamD at an SAPFM event several years ago I’ve been a complete fan of the concept, and a couple years ago Adrian Preda’s version lit a fire under me.
With my planing board sitting on the garage worktable I made a number of modifications to enhance its capabilities at being a productive shop accessory, especially in a setting that was not outfitted as completely as my own shop.
My first action was to attach skids underneath the “legs” for two reasons; first I wanted it raised about an inch for my use in the barn (it may be only an inch, but sometimes an inch makes all the difference in the world when doing hours of work at the station), and second I needed a means to clamp it down to the work table in the garage. I used some cherry I had and simply screwed it to the bottoms of the legs, making it effortless to remove or revise in the future.
My next modification was drilling a series of dog/holdfast holes through the top. With the accessories I already possessed this enhanced the performance immensely.
The center row of holes is 5/8″ matching the small Woodcraft holdfast while the other holes are 3/4″ to accommodate the Lee Valley devices. At some point in the future I am going to experiment with making home-made holdfasts.
Next week I’ll discuss the remaining modifications.
This is the rare occasion where Workbench Wednesday features someone else’s workbench.
In my years of serious woodworking I have seen three fundamentally new workbench forms come on to the scene.
First is the torsion box which, to my knowledge, was popularized by Ian Kirby. I have employed that technology in my first and still favorite workbench, and in another larger bench built for my friend Tom, and is the basis for my ultimate portable benches, now entering their fourth generation. The torsion box is an elegant high-performance idea, and I am glad I know of it. It has certainly served me well.
But the focus of this post is the idea I find the most exquisite and innovative of all, Shannon Rogers’ “apartment” or “joinery” workbench. I saw an early prototype in 2009(?) and was immediately captivated by the concept. The final version is downright seductive in its genius and capability. Ever since seeing it in its final glory at a regional SAPFM meeting in 2011, making it has been on my “to do” list.
I’m not sure exactly when I will get to making one, but you can be assured that the day is coming in the not-too-distant future.
Thank you, Shannon, for unfurling your creative power and unleashing this brilliant design on the rest of the world. I simply cannot think of a better solution to full-spectrum woodworking in such a small footprint. The video is an excellent tutorial of the set-up’s capabilities.
No, I have not forgotten the Ultimate Portable Workbench and will return to it very soon, but last week I spent a day resolving one of my frustrations with the massive oak Roubo bench. Until now I have just had open storge underneath it, and even though I put contents in boxes and milk crates it was not a particularly useful setup. Given my intention to reorient priorities in the shop and gather all my marquetry tools into one place, now was the time to make a change.
Way back in time I acquired a large number of drawers from surplused (read: thrown away) museum collection storage cabinets and have used them variously as cabinets themselves with a piano hinge, parts trays, etc. In this instance I tossed together a cabinet box into which I could place five 24″ deep x 36″ wide drawers to hold marquetry and parquetry tools and jigs. It was nothing special, just Baltic birch sheet stock and aluminum angle drawer supports.
I am pleased with the new accessory for the bench and shop and await my own decision on drawer pulls to complete the project. Sometimes I am a fussy client.
I’m thinking much of this topic and most of these projects, with one or two exceptions, fall clearly into the “…and well beyond,” territory.
I’ve got plenty of workbenches scattered around the barn (16!), but I cannot seem to stop myself from planning on building even more. It is apparently one of my dysfunctional psychopathologies. Perhaps I was deprived of a workspace/bench when I was a toddler. In short, I may have to start recruiting more family and friends to take some behemoths off my hands.
At this point I have several ideas in the works, some innovative, some self indulgent, and almost none of them “necessary.”
First, I need to finish up my Ultimate Portable Workbench, which I have already been chronicling here.
Second, two years ago I built a bench-top planing board from cypress and I would like to replicate that project using a slab of vintage black walnut, which I would resaw and actually build two.
Third, I would dearly love to build a version of Renaissance Woodworker Shannon Rogers’ truly innovative “apartment” workbench, with its joinery tower and detachable planing beam. Simply genius, probably the most inventive workbench design in my lifetime.
Fourth, I’ve got a massive slab of ancient mahogany from the Cincinnati area lumber yard that Chris Schwarz obtained for me, it is roughly 4″ x 22″ x 7′. To go with this, I have some 6″ x 6″ ancient black walnut for legs. This would yield a truly remarkable Roubo bench, but then I already have a truly remarkable ancient wood Roubo bench in place. Sounds like a pure vanity/self-indulgence project for me. Maybe I should just sell the lumber to someone else who needs/wants a bench even more than I do. If this is you, let me know.
Fifth, I’ve got a slabbed-up hunk of birds-eye maple ready to be turned into a bench, with vintage oak 6″ x 6″ legs. Like the one in the previous paragraph, this would result in a truly eye-popping Roubo bench. But also like the previous one, I do not need it and should find someone else who really does.
Finally, I’ve got a pile of oak 10″ x 15″ timbers airing out in the yard next to the barn, and with a little chainsaw work they could be rendered into usable bench slabs. Maybe I can use them for chainsaw practice.
Oh, and I’ve got a stash of 7″ x 14″ Douglas Fir timbers from a building dismantling from around 1945 or so. They would also make superb bench tops and legs.
My ongoing project to complete “The Ultimate Portable Workbench” takes a back seat to my revisiting a existing workstation in the shop this week.
A recent learning experience led me to re-think my salvaged Sjoberg bench that serves as my “fine work” station for almost everything un-woodworking-ish, like engraving, checkering, fine metalwork, etc. During Thanksgiving week my son-in-law and I had the opportunity to attend a workshop on reloading ammunition, which involves a lot of press work. The Sjoberg was simply inadequate for those particular tasks even though I do a lot of other gun work there. But, could it be modified to work for reloading?
I am happy to report that the answer was, “Yes.”
At issue was the shallowness of the workbench top and the difficulty, read: impossibility, of attaching some presses to the edge of said top as required by the processes involved. A simple add-on solved both problems in one swell foop.
I had a scrap of butcher block benchtop material that fit the cutaway configuration of the bench top almost perfectly. All I needed was to create a way to affix it solidly to the existing bench yet make it removable for more routine work.
I accomplished this through the addition of a couple simple elements to the underside of the slab so that one end could be captured by the face vise and the other end by the end vise.
Putting the new appendage in place and tightening the vise screws and viola’, the new feature is darned near perfect for the tasks. It suits me so well I may wind up leaving it in place most of the time.
Installing it and de-installing takes upwards of seven seconds per operation.
Gluing the internal ribs was no big deal; first I dry-fit all the ribs then marked their locations, so that I would know where to put the bead of glue. I used PVA mostly because I have a lot of it left over from another project and just wanted to use it up.
Once the glue lines were down and the grid re-placed on top of them I simply “clamped” them in place with a couple hundred pounds of bricks. Everything stayed put over night and in the morning all was well.
I moved on to the backing blocks needed for the threaded screw holes and a couple of other features. For the threaded vise holes I just held them in place with spring clamps.
For the backing blocks on the top and bottom faces I uses more of the same ‘brick as clamps” strategy.
One of the major evolutions of this final version versus the first one was the overall length of the unit, from 48″ to 60″. There was no a priori reason for this change from a functionality perspective, there is precious little conservation work you can do on a 5-foot long bench that you cannot do with a 4-foot long bench. The proof of this is my beloved 4-foot torsion-box-with-Emmert bench that has served my everyday needs for more than thirty years, with a little help from a movable deadman.
In the earliest versions the only way I could fit in 30″ legs was to install them offset. For reasons I can never really articulate, I found this feature offensive.
When it comes down to it, the real reason for the extended length is that it allowed me to have folding legs that did not have to overlap when the bench was folded up. Splitting the length distance in half, I can have folding legs of 30″, which when added to the 3-inch bench thickness proved me with a 33″ working height; lower than I prefer but adequate for on-site work even for an extended period. Given that the bench was designed for on-site conservation tasks, much of which would be executed while sitting, this was more than acceptable.
As an incidental benefit, the length also allowed me to make full advantage of a 60″ x 60″ piece of Baltic Birch plywood. I began by cutting the whole piece of 6mm Baltic Birch into two 24″ x 60″ face skins and one piece of 12″ x 60″ to use towards the internal torsion-box grid.
With a perimeter of 12mm Baltic Birch I set to cutting and gluing the pieces in place.
I ripped the 6mm plywood into the necessary ribs on the table saw, then ganged them together to edge plane the whole lot of them to enhance the overall flatness.
I cut all the ribs to length and notched them for the egg-crate construction.
This is us test-fitting the internal grid on the previous version. Somehow I did not take pictures of this step on the current model.
Over the next several Wednesdays I will be chronicling the construction of a new, 4.0 version of a portable workbench I first designed and built more than twenty years ago. This version began its gestation more than seven years when I reflected on version 3.0 and imparted several additional modifications to improve its utility immensely as I am finishing the project only now.
The entire concept rests on the twin features of an ultra-high slab strength and ultra-low slab weight. The only obvious resolution of this seeming paradox was to fashion the slab in the form of a torsion box, a concept I first learned from Ian Kirby. My historical trek is as follows.
Version 1.0 was really just a proof-of-concept prototype, although it is still in use more than twenty years later, albeit as a table next to the barbecue grill. The 24″ x 48″ top was indeed lightweight and very strong, but that was countermanded by using folding steel legs heavier than the top.
Version 2.0 was a marked improvement in many respects, and is still in use on the fourth floor as a work table. The top dimensions remained at 24″ x 48″.
Version 3.0 was a demo project from a Groopshop eight(?) years ago for/with my friend BillR, who needed a bench to use in a museum gallery, which happened to be identical to the original purpose concept for the bench project. Make a large, strong, lightweight collapsible bench that one man could easily carry into a work environment, set it up and take it down. One of the major changes to this version was to make the top 24″ x 60″ which increased the overall weight around 4 pounds but added some important improvements to the undercarriage layout and construction.
Version 4.0 builds on the earlier improvement and takes the bench many steps farther.
Recent Comments