The Veritas Power Tenon Cutters are incredible tools. They are based on the old hollow auger tools, but they are easier to set, maintain and use. They make perfect round tenons, and you don’t have to use a drill to power them. I have used a brace, and my right hand at times, to make tenons.
The tools have a bit of a learning curve. Many people end up with tenons that are slightly off-center. Or worse, wildly off-axis.
I first started using these tenons cutters when I was in my “willow furniture phase” in about 2000, so I have thought about these tools a lot and used them a lot. The following video shows my tips for how to get the tenon centered on your stock.
If you like this sort of hard-won information, you’ll find more of it in my three chairmaking products:
For the last year I’ve been building chairs using slabs of bog oak that are 2,000 years old (according to a carbon dating test) and was harvested in Poland.
Furniture maker Andy Brownell is responsible for starting me down this path. He offered me some scraps of bog oak from one of his commission pieces. After experimenting with it and building a chair using the scraps, I was sold.
Together we bought a large chunk of a bog oak tree. It was the most I have ever spent on a single load of wood. However, don’t be freaked by that statement. Because I work almost entirely with common domestic woods that aren’t highly figured, my lumber bill has always been minimal.
This entry is about my experiences with the wood – good and bad. I’ve worked before with some older bog oak from Denmark, so I have a little perspective. But I am not an expert. Trees, like people, are individuals and are weird.
The hammer test I perform with chair parts.
Strength
My biggest concern with the bog oak was that it wasn’t strong enough to use for a chair. This is oak that has been in a peat bog for 2,000 years and is on its way to becoming petrified. After wallowing in an anaerobic environment filled with turtle poop, is it too weak?
The good news is that the tree we bought was fast-grown oak. Some of the annular rings are 3/8” apart. Fast-grown oak is typically stronger than slow-grown oak. Also, the grain was incredibly straight, except at the butt of the tree. I have never worked with wood that is this rod-straight.
I made some sample chair-sized parts – legs, stretchers, sticks and arms. Then I propped the test pieces up on 4×4 blocks and smacked them with our lump hammer. Hard. They all survived just fine. No cracking, though they dented a little more easily than modern European oak.
Because the parts passed the test, I made some chairs using the bog oak.
Working Properties
The bog oak feels a bit like plowing dirt at times, instead of slicing wood. The wood requires more effort to saw, chisel and shape than modern European oak (which I have a lot of experience with). I also feel like it is more difficult to get a finished surface, but it’s not because of tear-out. It’s because the stuff is dense and resists you.
It smells quite a bit when you cut it with electric machines. And the smell it makes is: bottomland. Mud, dirt and cod poo. But it’s not awful. The worst-smelling wood I ever used was mahogany that had been sunk in the Amazon for 200 years. When you cut it, it smelled like rotten, burning fish that had been injected right into your nose.
The smell goes away quickly. And the finished pieces have zero smell (just like normal wood).
A slab of bog oak that shows the color variation.
Color
Bog oak gets darker as it percolates in the bog. I’ve worked with 4,000-year-old stuff that is almost black. This 2,000-year-old stuff has lots of variation. The wood by the bark is nearly black. The majority of the heartwood is a chocolate brown. And some parts are tan or khaki. And you see that variation all in one board from one tree.
So you have to think about color the entire time, even though the wood comes from the same damn tree. A stick from the bark part of the tree can look radically different from a stick 3″ away.
Downsides and Defects
Wood that has been under ground/water for a long time can have some faults. I find far more structural faults with bog oak than standard European oak. Some of these splits and cracks look like the result of the wood being dried. Other cracks look much older (something killed this tree and sent it into the bog).
When ripping up the stuff, you absolutely have to pay close attention to the end grain and look for splits. Most of the splits I have found are near the pith of the tree, but I have also found some out by the bark.
I reject anything with a split for structural parts (basically all my chair parts). These pieces are fine for boxes or stuff that doesn’t support a human body, but shakes and chair parts don’t go together.
The other odd quality of the wood is that it’s not good for making wedges. I made many bog oak wedges to secure the legs and sticks of the chair. It was poor wedge material. When struck on its end grain, the bog oak was mushy and split easily. (Even though it was strong when struck 90° to the end grain – weird.)
Here you can see the color variation.
The Upside
The stuff is beautiful, even with simple finishes. I use linseed oil and beeswax, and the range of color is extraordinary, from coal black to an olive green. Plus, after five or six chairs, I have found ways to use this color shift to my advantage in the design.
All in all, the stuff is worth working with. The prices I fetch for bog oak chairs make it worth the effort. However, I wouldn’t want to work with it exclusively. It is recalcitrant. And I am always happy to start saddling a chair in modern red oak or white oak after working the boggy stuff for a couple weeks.
Where to get it? There are vendors who specialize in the stuff. I don’t have experience buying from them, so do your research. Andy and I bought our bog oak from M. Bohlke, a long-time local supplier of amazing woods.
An early 18th century English Windsor. No stretchers.
After 20 years of studying vernacular chairs in Western cultures, I am happy to state – again and again – something that some people refuse to believe.
Chairs do not need stretchers to be strong or to last hundreds of years.
The furniture record is clear. Chairs without stretchers survive just fine. They survive for the same reasons that any chair makes it for a few hundred years. The wood selection and joinery are excellent.
An 18th century Welsh Cardiganshire chair. Beat to heck. Still strong. No stretchers.
You might say: People weighed less and were smaller back then. While not universally true, it doesn’t really matter because chairs without stretchers continue to be made and sat upon by well-fed Westerners today.
So why do some chairs have stretchers and some do not?
Chairs without stretchers are easier to build and easier to repair. If a leg becomes loose, re-glue it and drive in a new wedge to return the chair to sound.
An Irish chair – likely 19th century. Doing just fine without stretchers, thank you.
Chairs with stretchers are more difficult to build and more difficult to repair. However, they can go longer between repairs. If a leg becomes loose, the stretchers will hold it in place for a good long while. You can use the chair just fine – until the stretchers come loose.
Stretchers are decorative – this is important for chairs that are sold in stores. It’s one more place to put a fancy turning or some wooden brooch below the seat.
Chairs without stretchers look odd to people who aren’t used to seeing them, which might be why we get so many comments from people when we post a photo of a stretcher-less chair (“Sitting on that chair will kill someone” is a typical comment.) The first Welsh stick chair I built in 2003 doesn’t have stretchers, and it’s still going strong. (Meanwhile my sister-in-law has burned through three sets of store-bought chairs during that same time.)
One of my favorite Welsh chairs. Look at how spindly those legs are. And yet, no stretchers. This chair used to have them.
I build both kinds of chairs, it depends on my mood, the effect I am going for and the wood on hand. If I have some dead-straight 2” oak chunks for legs, I see no reason to add stretchers, unless the customer insists. But if I have some 1-5/8” walnut for legs, you can bet I’m going to add stretchers to shore up the undercarriage – both structurally and visually.
Stick Chair Merit Badge Update
In other stick chair business, we are down to 70 merit badges. And when they are gone, this little promotion is over. What the Sam Hill am I talking about? Read this. Build a chair, follow the rules (please!) and get one of the last ones.
A Scottish Darvel chair. A classic vernacular form.
The following short story was passed to me by a guy at the John C. Campbell Folk School, and it is well worth reading, especially if you are a vernacular chair nerd.
Published in the Christian Science Monitor in 1986 (the year I graduated high school), the short story “I’d Like to Make You a Chair” by Pippa Stuart begins with a couple’s home being burgled. It ends with a chair and complex thoughts about forgiveness.
As I read this story, I tried to envision the chair the Scotsman was building. I concluded that it had to be a stick chair.
With the Star-M bits and many other similar bits in short supply (in the chairmaking sizes), I had to switch back to spade bits for all my chairmaking activities.
This is not a horrible thing. In many ways I prefer the spade bits. They’re cheaper, they are easier for beginners to steer (because there are no side flutes that cut) and they are more readily available.
I’m still not a fan of the new Irwin Speedbor spades. They removed the bit’s rim cutters so now they cut slowly. Too slowly in hardwoods. Why is slow-cutting bad? They cut so slowly that they heat up and soften in no time. You can cook a bit in just a couple holes in oak.
So I’ve been looking for alternatives to recommend. The WoodOwl spades are good, as I’ve mentioned before. But they are sometimes in short supply. So I’ve been buying a lot of bits from various suppliers and testing them. Most are quite poor. They cut slowly and lose their edge quickly.
I am happy to report that the spade bits from Benchmark Abrasives are very good. The 5/8″ spade is made in the USA (I don’t know who makes it). It cuts as fast as the old Irwins and seem to hold a good edge. And the price is right: $2.59 per.
Please don’t be a Greedy Gus and order 20 or 30 bits. I get about four or five chairs out of a spade bit (when it’s treated properly).
