The parting tool is one of the first tools that most turners get with their lathe. The obvious purpose is to help you “part” the turning off of the lathe. However the tool is much more useful than just getting the wood off of the lathe. So let’s take a look at two different parting tools then move on to ways you could use your parting tool.
Typical Parting Tools
I started with a 1/8” wide parting tool. That is fairly thin. The metal of the tool is nice and solid and comes to a point. You can flip the tool and still work with it. The other parting tool is only 1/16” wide. Because this is thinner the shape is changed to give the point more support.
This is the tool to use if you want to save on your wood or (as is more likely in my case) I’ve not left enough room to use the wider parting tool! Sometimes you have to part the wood a good distance from your tool rest. If you are turning a box that is 4” in diameter then you need a tool strong enough to reach that 2″ from your tool rest. Both of these tools can do that easily. If you are parting in a good distance make the cut slightly larger than your parting tool, about 50% larger. So your 1/8” parting tool will need a cut about 3/16” wide. This will prevent the parting tool from binding and burning your turning while you are parting it off.
Cleaning up the ends of your spindle blank
Sometimes when you put rough wood on the lathe your ends are not square. They can be on an angle or just plain uneven. Using the parting tool to clean up the ends of your spindle helps keep your spindle balanced, your other cuts smooth, and a sharp or unexpected edge away from your fingers.
Parting wood off of the lathe between centers
Turning a fish bonker is a good spindle turning project with a good sized piece of wood. After shaping the bonker, sanding, and then finishing you are ready to part the project off of the lathe. As the drive spur and the live center are holding the wood securely you need to remove the wood at each end. So the goal is to make the nub of wood small enough to be easy to remove when it is off the lathe, but large enough to keep the wood spinning on the lathe as you part off the other end.
I make the tail stock end the smallest amount needed to keep the spindle turning. Then I work on the head stock side. (If you are nervous about your wood not being strong enough and you’re also not sure when it will actual part away then move between the two ends slowly making each end smaller.) Once you’ve made the tail stock as small as you feel comfortable with then complete the parting by cutting through at the head stock.
Use one hand to hold the parting tool. The other hand is ready to “catch” the turning as the wood separates and comes off of the lathe. This may still leave you with a small piece of wood to clean up at the head stock end and a slightly larger piece at the tail stock. This method lets you part your spindle projects safely off of the lathe.
Parting wood held in a multi-jawed chuck
A multi-jawed chuck can grip your spindle turning without the tail stock for support. For safety reasons use the tail stock if you can. Once you completed as much of the project with the support of the tail stock then you can remove it. This leaves the tail stock end of your turning unsupported. If this is a small spindle and not too long you can then take a skew chisel and finish off that end of your project.
The advantage is that you can then use your parting tool to part the turning project completely off of the lathe at the head stock end. This makes finishing the turning much easier. You only have one end to sand and wax with no extra nub on the end to deal with.
Making tenons with a parting tool
Tenons are very useful in turning. You can make tenons to fit into various sized chucks or you can turn tenons on projects that will fit together for the project. The 1/8” parting tool works best because you are making a wider cut with each use of the tool. For my multi-jawed chuck a 3/8” tenon gives me a good amount of wood to grab in my chuck and I know that three cuts of the parting tool give me that depth. When making a lidded box I turn a tenon on the bottom of the box.
Turning lidded boxes
Turning a lidded box is a great turning project. The trick to this is the parting tool. You turn your blank round between centers on the lathe. On the bottom end you make a tenon with your parting tool. Then turn your blank round and figure out where you want the joint on your box to go. The parting tool is going to be used to separate the lid from the bottom of the box. When actually separating the two pieces don’t make your parting cut flush with the bottom. Move your parting tool away from the bottom just a smidge so you can see a small ridge.
So the distance between the lid and the bottom has to include three things: the tenon on the lid, (So make that straight using your parting tool) a space for the parting tool to cut / part between the two pieces, and leave a smidge more to help you when you are hollowing out your bottom so the tenon on the lid can fit in. Parting between the lid and bottom is where I would use the 1/16” parting tool.
Parting off bowls and lids
When turning a bowl on the lathe and holding it by a tenon in a multi-jawed chuck the parting tool can be used to part the bowl from the lathe. Turn the outside of the bowl to your desired shape. Hollow the interior of the bowl and finish both sides of the bowl. When you are ready to separate the bowl off of the lathe take your parting tool and part it off. To make the bottom of the bowl flat, even with some wood movement, angle your parting tool towards the center of your bowl. Not a lot, you are not turning another bowl. Just a slight angle will give you a concave bottom that will allow your turning to rest steady on a table.
Another place the parting tool helps is with making shawl rings or jar lids on your lathe. In turning a Mason jar lid you have to part off each lid. A large blank on a face plate can give you several lids at one time. To prevent burning make sure that you cut a space that is slightly larger than your parting tool.
Decorative and functional use of the parting tool
This honey dipper has the slots on the dipper end made by a narrow parting tool. When turning the dipper you can shape the head and then use the parting tool or in the opposite order as well. These slots allow the dipper to hold more honey so in this case they are functional.
You can also use the parting tool to create interesting shapes by making slots for Christmas trees or vases. It is the same procedure as parting off the lathe just make sure you don’t go too far. I find that if I look down vertically over my turnings I can see the thickness of the center of the turning so that each slot goes for the right distance.
Accuracy and placement with the parting tool
The parting tool is a precise width. This allows you to use the parting tool as a measuring device on your lathe. A half inch tenon requires 4 cuts with the 1/8” parting tool. A suggestion that came from the woodturning Entrepreneur Facebook group was to turn the 1/8” parting tool on its side. This gives you a very sharp point.
Using the parting tool this way gives you a groove on your turning. This can be a measure of where you want to make your parting slots, or possibly a burn line on your turning. To make the groove move your tool rest away from your turning. Present the tool from the bottom side of your turning and slowly raise the tip to the spot you want to make your groove by lowering the handle. Don’t be too aggressive here you just want a mark on your turning. This is basically similar to using a scraper on your bowls. You want the cut / scrape to be made below center on the turning.
How have you used your parting tool? Some turners who are into miniature turnings will use the parting tool like a small skew chisel just in case you need more ideas!
Turning For Profit
A parting tool is one of the easier turning tools to use. As you saw above you can use it in a variety of ways. If you are just starting out turning wood have a look at my Woodturning Blueprint book. It introduces the tools you need to turn and suggests seven progressive projects to help you build your turning skills. There are also business information included for each project. Once the turning bug has bit you will have more products than you know what to do with. Turn to the Woodturning Blueprint for some business advice to get you started in the right direction.
I love wood turning and sharing with you. Thank you for letting me join you on your woodturning journey. Have fun and remember to always turn safely.