We research products independently. When you buy through links on this page, we may earn a commission from Amazon at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. Read our affiliate disclosure.
A lathe is a machine that spins a workpiece around a fixed axis while a cutting tool removes material from it. Because the work rotates against the tool, a lathe makes shapes that are round in cross-section: bowls, table legs, pens, shafts, bolts and pulleys. It is one of the oldest machine tools, and the same basic idea runs from a woodturner's benchtop lathe to a factory CNC turning center.
What separates one lathe from another is what it cuts (wood or metal), how the tool is held (by hand or in a mechanical tool post) and how big a piece it can spin. This guide explains how a lathe machine works, the main types, the parts you will see on any lathe, and what each kind is used for.
How a lathe works
Every lathe does three things:
- Holds the work. The piece is gripped at one end by a chuck or faceplate, or supported at both ends between centers.
- Spins it. A motor turns the headstock spindle, usually through belts or pulleys, at a speed you set.
- Presents a tool. A cutting edge meets the spinning surface and peels material away, leaving a round profile.
On a wood lathe you hold the tool in your hands and support it on a tool rest. On a metal lathe the tool is clamped in a tool post on a sliding carriage and moved with handwheels or an automatic feed. That one difference explains most of the others: speed, precision, price and the way each machine is used.
Types of lathes
| Type | What it cuts | How the tool is held | Typical use | Amazon |
|---|---|---|---|---|
| Wood lathe | Wood, some soft plastics | By hand on a tool rest | Bowls, spindles, pens, ornaments | See options |
| Mini or benchtop wood lathe | Small wood work | By hand | Pens, small bowls, ornaments | See options |
| Metal (engine) lathe | Steel, aluminum, brass, plastic | Tool post on a carriage | Shafts, threads, bushings, precision parts | See options |
| Mini metal lathe | Small metal parts | Tool post on a carriage | Hobby machining, model engineering | See options |
| CNC lathe (turning center) | Metal, plastic | Turret, computer controlled | Production parts | |
| Specialty lathes | Glass, stone, ornamental work | Varies | Scientific glass, ornamental turning |
Wood lathes
A wood lathe is built for speed and freedom of movement. There is no carriage in the way, just a tool rest you slide along the bed and lock where you need it, so you can shape curves freehand. Sizes run from mini lathes with about an 8- or 10-inch swing to floor lathes that swing 24 inches or more. If that is the kind you want, our guide to the best wood lathe compares current models.
Metal lathes and the engine lathe
A metal lathe is heavier and more rigid, with a carriage that carries a cross slide and compound rest. A lead screw geared to the spindle can feed the tool along the work automatically and cut threads. The traditional name for this general-purpose machine is the engine lathe, from the era when shop machines were driven by belts from a central engine. Our wood lathe vs metal lathe comparison goes deeper.
Mini and benchtop lathes
"Mini" and "benchtop" describe size, not material. There are mini wood lathes and mini metal lathes, and they are very different machines. For the woodturning side, see benchtop vs floor lathes.
CNC lathes
A CNC (computer numerical control) lathe moves its tools under program control. In industry these are usually called turning centers. They are production machines, not the subject of this site, but they work on exactly the same principle.
The main parts of a lathe
Most lathes share the same core layout:
- Headstock. The powered end. It holds the spindle in bearings, plus the drive belts or gears.
- Spindle. The rotating shaft. Its threaded nose takes chucks and faceplates, and its hollow taper holds centers.
- Tailstock. The opposite end. It slides along the bed and supports long work with a center in its quill.
- Bed (ways). The rails that connect headstock and tailstock and keep everything aligned.
- Tool support. A tool rest and banjo on a wood lathe; a carriage, cross slide and tool post on a metal lathe.
- Motor and speed control. From step pulleys to electronic variable speed.
Woodturners should read our labeled guide to the parts of a wood lathe, which covers spindle threads, Morse tapers and the banjo in detail.
How lathe size is measured
Lathe size is given as two numbers. Swing is the largest diameter that clears the bed, twice the distance from the spindle center to the bed. Distance between centers is the longest piece you can mount between the headstock and tailstock. A "12 x 21" wood lathe swings about 12 inches and holds about 21 inches between centers.
What is a lathe used for?
In woodworking
- Bowls, platters and hollow vessels
- Spindles: table and chair legs, balusters, tool handles, rolling pins
- Pens, bottle stoppers, ornaments and other small gifts
- Boxes with fitted lids
If you are curious where to start, our list of wood lathe projects runs from a first spindle to a first bowl.
In metalworking
- Shafts, axles and pins turned to precise diameters
- Internal and external threads
- Bushings and sleeves bored to size
- Facing the ends of bar stock flat and square
Other materials
Specialty lathes turn glass for laboratory equipment, and some turners work acrylic, resin blanks and soft stone. On a wood lathe, stick to materials the manufacturer allows in its manual.
What a lathe cannot do
A lathe makes round things. It does not cut flat panels, rectangular pockets or straight slots on its own; that is the job of a mill, router or saw. Woodturners can add indexing (locking the spindle at set positions) to flute or drill around a turning, but the core of the machine is rotation.
Lathe safety basics
Any lathe concentrates a lot of energy in a spinning workpiece. For wood lathes, the American Association of Woodturners (AAW) recommends a full face shield whenever the lathe is on, starting at a low speed, keeping the tool rest close to the work, and standing out of the "firing zone" in line with the spinning piece when you switch on. Loose sleeves, gloves, jewelry and long hair must stay clear of rotating parts on every type of lathe. Our woodturning for beginners guide walks through the AAW's safety habits step by step.
Common misconceptions
- "A lathe is a metal-only machine." Wood lathes are the most common lathes in home shops.
- "Bigger swing means a better lathe." Swing is capacity. Low-speed control, mass and rigidity matter just as much.
- "Any lathe can cut any material." Wood and metal lathes are built for different forces and speeds. Use each for what its maker designed it for.
- "A lather is the same thing." A lather installs lath (strips behind plaster) in construction. Different trade, similar spelling.
FAQ
What is a lathe in simple terms?
A lathe is a machine that spins a piece of material on an axis while a cutting tool shapes it. Because the work rotates, everything a lathe makes is round in cross-section: table legs, bowls, pens, shafts, bolts and pulleys.
What is a lathe used for?
Wood lathes make bowls, spindles, pens, tool handles, furniture legs and ornaments. Metal lathes make shafts, bushings, threaded parts and precision round components. Other lathes turn glass, plastic and stone, and CNC lathes produce parts automatically from a program.
What is the difference between a lathe and a mill?
On a lathe the workpiece spins and the tool stays relatively still. On a milling machine the cutter spins and the workpiece moves under it. Lathes make round parts; mills make flat faces, slots and pockets.
What is an engine lathe?
Engine lathe is the traditional name for a general-purpose metal lathe with a carriage, cross slide and lead screw that can feed the tool automatically and cut threads. The name dates from when lathes were driven from a central engine by belts and line shafts.
What is a lathe dog?
A lathe dog is a clamp fastened to a workpiece turned between centers on a metal lathe. Its tail engages a drive plate on the spindle, so the spindle can turn the work without a chuck. Wood lathes use a spur drive center for the same job.
Where to go next
If you want to turn wood, start with our best wood lathe guide to compare sizes and features, then read woodturning for beginners before your first session. Deciding between wood and metal? Our wood lathe vs metal lathe comparison lays out the differences side by side.