Even on a treadle lathe, the roughing gouge throws off tons of thick shavings
Roughing out is the first thing you do on a lathe project, when you take a square piece of wood and turn it round. You want to do this fast. Surface finish is not that important, although you don't want a disaster. Since the wood is square, you are at least starting with interrupted cuts.
I have three tools that I can use for roughing out (above).
A continental gouge. If you look at early catalogs, you'll see that essentially they offered two kinds of tools: what we now call the continental gouge, and a typical spindle gouge. Mine is a 1" continental gouge.
A roughing gouge. This is the standard tool people use for roughing nowadays. I have a forged 3/4-in roughing gouge. I also have a much larger one that is really overkill and too big for a machine of this power. This tool is forged because of its size. Ashley Iles and other companies also make machined roughing gouges in smaller sizes.
Insert tooling carbide square edge scraper tools that can be used for roughing as well. Many people prefer the insert tooling carbide scrapers because the learning curve is easier. I bought this tool and a few other carbide insert tools because I've gotten a lot of questions about whether they could be used on a treadle lathe.
In truth, I have a fourth tool that can be used. If I wanted to, I could use a regular spindle gouge and it would work fine - though slower. I left the spindle gouge out of the demo because I would use it only if it were my only option.
A roughing gouge is the most popular tool for this purpose but the question is: for a treadle lathe for which makes the most sense.
l-r: scraper, continental gouge, roughing gouge
In the picture above, you can see the results of all three tools with the tool used underneath it. All this work was done with each tool in under a minute - maybe even under 30 seconds. I developed a sense of how fast they cut - and we can see the quality of surface they leave behind. I used all tools with about the same amount of pressure and force. But not enough to overwhelm the machine. The wood is soft maple.
From left to right:
The carbide scraper. My least favorite tool of the three, because it leaves such a rough surface. But it was dead easy to use. You take the tool, you hold it horizontally, and just feed it with moderate pressure, and it wastes away the material. It's exactly what a roughing tool is supposed to do. My only complaint is that there are splinters on the edges of the cut. On harder materials, I would guess it works better; on softer materials you would have a worse, rougher surface.
The continental gouge is historically the oldest design of the group. It is basically a wide, shallow gouge with a slight curvature to the face of the gauge. This particular one is one inch wide and a joy to use. The tools roughs out well and is very easy to control. While not as fast cutting as a roughing gouge, it allowed me plenty of control. The final surface was pretty good. It's also a versatile tool because you can do a lot of finishing cuts with it.
The three quarter inch roughing gouge on the right differs from both a spindle gouge and the continental gouge in that its front is sharpened straight across and the sides go up high and vertical, so they can slice interrupted grain cleanly. The tool profile is more of a "U" than a gentle curve. What you get is a tool that produces very thick shavings very quickly, and makes short work of turning a square billet round. It also is a very reliable tool in that you don't have a sense that you're about to fall off the edge of the Earth or anything like that. It certainly cuts faster than the continental gouge. As you can see, it leaves a reasonably clean surface.
I think the Continental gouge is a very versatile tool. Even when you're not roughing, it takes nice wide shallow cuts. But in terms of actual roughing, the roughing gouge is the winner. I just didn't like the square scraper: the surface it left is rough. I didn't feel the need to use a scraper since I didn't have trouble with the gouges.
If I were a more experienced turner than I am, I would follow the roughing gouges work with a skew chisel to create a perfect cylinder with a perfect surface. Neither the continental or roughing gauges really chew up your surface, so there's not much material to remove to get something perfect. Since I'm less than experienced turner, I find having a fairly decent cylinder from the Continental gouge to be actually quite nice.
If I were doing smaller work, my guess is a less aggressive Continental gouge might be a better choice, although all of these tools come lots of sizes, including pretty small tools meant for pen turning. If I only had one roughing gouge, I wouldn't want one too much smaller.
The most important takeaway from this experiment is that - as in most areas of woodworking - many different options work, provided that the tool is sharp. While there are cases in turning where something won't work well - for example, using a spindle gouge inside a bowl - overall you could do an awful lot of turning with just a spindle gouge and either a roughing gouge or continental gouge (just make to it easier). The most important thing I did during this test wasn't learning some secret technique handed down by turners since 1642. Rather it was making sure my tools were sharp and of the correct geometry when I sharpened them. I am spending time at the lathe nearly every day and as my experience grows and my technique gets better, my turning is naturally improving. I am going faster with far fewer catches and slip-ups.
The continental gouge on the left is ground with the nose sticking out slightly. The roughing gouge on the right is ground square
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02/11/2026 Dave Polaschek
On small pieces of tractable wood (fruit-woods, mostly, but also poplar, basswood, etc) I will sometimes rough right from the skew or bedan. They are my simplest turning tools to sharpen, so are often in the best condition and sharpest. And using the bedan as a skew took some practice, but by angling the cutting edge so its slicing rather than scraping, I can get to round enough to ride the bevel normally pretty quickly. And if the wood proves less tractable, I’ll straighten out the bedan and use it as a scraper.
I don’t have a continental gouge, so I may need to try grinding one of my other gouges with that profile, but my suspicion is that it’ll be a little less friendly on a motorized lathe. Since I can’t reliably walk and chew gum at the same time, and last time I tried a treadle-lathe I fell over, I’m pretty sure I’ll be sticking with burning electrons.
02/11/2026 Scott
Please continue with these turning tutorials. They are very useful for us novices. Thank you!
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I don’t have a continental gouge, so I may need to try grinding one of my other gouges with that profile, but my suspicion is that it’ll be a little less friendly on a motorized lathe. Since I can’t reliably walk and chew gum at the same time, and last time I tried a treadle-lathe I fell over, I’m pretty sure I’ll be sticking with burning electrons.