What does '12-inch swing' mean for the size of bowl I can turn?

Swing is the maximum diameter of work that clears the lathe bed. A 12-inch swing means a 12-inch diameter piece is the largest that will spin without hitting the bed. In practice, bowl blanks need to clear with some margin, so a 12-inch swing lathe comfortably turns bowls up to about 10 to 11 inches in finished diameter. A rough, out-of-round blank at exactly 12 inches may not clear without preliminary shaping.

How much between-centers do I need for chair legs or table legs?

Standard chair rungs and short legs run 15 to 17 inches; they fit comfortably on any midi lathe with 18-inch or more between centers. Dining table legs typically run 27 to 29 inches; they require a full-size lathe with 36 to 42 inches between centers. If furniture legs are a regular part of your work, a midi lathe will frustrate you on that specific dimension even if it handles all your bowl work fine.

What is the difference between a fixed headstock and a sliding headstock?

A fixed headstock is bolted in place at one end of the bed. A sliding headstock repositions along the bed, which lets you swing large platters on the outboard end of the spindle without the tailstock in the way. The Powermatic 3520C has a sliding headstock. The Grizzly G0766 has a fixed headstock. For most turning including large bowls, a fixed headstock is not a limitation. For platters over 20 inches, a sliding headstock opens up work that a fixed one cannot do.

Is a midi lathe enough for a serious turner?

Yes, for most work. A midi lathe with 12-inch swing handles bowls, hollow forms, pens, spindles, and small vessels. The limitation is physical: anything over about 11 inches finished diameter exceeds its capacity, and anything over 18 to 20 inches of length exceeds its between-centers reach. Professional turners who specialize in large bowls or long furniture work need a full-size lathe. Turners who specialize in smaller work turn professionally on midi machines.

What size lathe should a beginner buy?

A midi lathe with 12-inch swing is the right starting point for most beginners. It runs on 115 volts, weighs under 140 lbs, fits on a bench, and handles the full range of beginner projects including bowls up to 10 inches. If you already know you will want 14-inch or larger bowls within a year or two, skipping the midi class and going to a full-size entry machine like the Jet JWL-1840EVS at roughly $2,500 avoids a second purchase.

Lathe Size Guide: What Swing and Between-Centers Actually Mean

Swing determines the largest diameter you can turn. Between-centers determines your maximum spindle length. Midi lathes swing 12 inches and reach 18 to 21 inches between centers. Full-size lathes swing 16 to 22 inches and reach 36 to 42. Most turners who overbuy regret the electrical and footprint costs before they regret the capacity.

These two numbers govern every machine in the class. Understanding them before choosing prevents the most common purchase mistake in the hobby.

What swing means

Swing is measured as the diameter of the largest piece that will clear the lathe bed. A 12-inch swing lathe can theoretically spin a 12-inch diameter piece. In practice, a fresh bowl blank that measures 12 inches across is often slightly out of round, and you need a few millimeters of clearance on each side, so the practical working diameter is closer to 11 to 11.5 inches.

Mounting a wooden blank between centers on a lathe — Between-centers length and swing over the bed are the two numbers that actually constrain what fits on the lathe. Credit: Jordanhill School D T Dept via Wikimedia Commons. CC BY 2.0.

The table below maps swing to practical finished bowl diameter:

Swing	Practical bowl diameter	Class
12 in	Up to 10-11 in	Midi
12.5 in	Up to 11 in	Midi
16 in	Up to 14 in	Midi/full
18 in	Up to 16 in	Full-size
20 in	Up to 18 in	Full-size
22 in	Up to 20 in	Full-size

A 10-inch finished bowl is a standard size for a serving or salad bowl. A 14-inch bowl is a centerpiece piece. A 20-inch bowl is a gallery piece that most turners never attempt. Buy for the work you will do, not the work you might theoretically attempt.

What between-centers means

Between-centers is the distance from the tip of the drive center (in the headstock) to the tip of the live center (in the tailstock) when the tailstock is fully extended. This is your maximum spindle blank length.

Common between-centers figures by class:

Machine	Between-centers
WEN 3424T	18 in
Jet JWL-1221VS	20.5 in
Laguna Revo 1216	16 in
Jet JWL-1840EVS	40 in
Powermatic 3520C	36 in
Grizzly G0766	42 in

A standard chair rung or short stretcher runs 15 to 17 inches and fits any of these machines. A chair leg at 22 inches fits the full-size machines but exceeds the midi class. A table leg at 28 to 30 inches requires a full-size lathe with at least 36 inches between centers.

A woodturner at a lathe in a workshop, shaping a piece mounted between centers on the spindle — Between-centers capacity determines maximum spindle length. Most furniture legs require 36 inches or more, which means a full-size lathe. Credit: Bertrand via Wikimedia Commons (CC BY 2.0).

The size classes in practice

Midi lathes (12 to 16-inch swing):

The WEN 3424T at $369 and the Jet JWL-1221VS at $990 both swing 12 inches. The Laguna Revo 1216 swings 16 inches at roughly $850. All run on 115 volts, weigh under 140 lbs, and fit on a bench. This is the right class for pens, small to mid-size bowls, ornaments, and short spindles.

Entry full-size (16 to 18-inch swing):

The Jet JWL-1840EVS at roughly $2,500 has an 18-inch swing and 40 inches between centers. It can be configured for 115 volts at reduced power. This is the natural step up from the midi class for turners who want larger bowls and longer spindle work without the footprint or cost of the premium machines.

Full-size floor lathes (20 to 22-inch swing):

The Powermatic 3520C at $5,999 has a 20-inch swing. The Grizzly G0766 at roughly $4,000 has a 22-inch swing. Both require 220-volt circuits and weigh 400 to 726 lbs. This class is for turners who regularly turn bowls over 14 inches or furniture work over 24 inches.

A woodturning workshop with tools organized on the wall and a floor lathe positioned in the center — Full-size floor lathes anchor a different kind of shop than a midi bench lathe. The footprint and electrical requirements both scale with the machine. Credit: Elliott Ledain via Unsplash (Unsplash License).

Fixed vs sliding headstock

Most midi lathes and full-size lathes have a fixed headstock. The headstock is bolted at one end of the bed and does not move.

The Powermatic 3520C has a sliding headstock, which repositions along the bed to allow outboard turning of large platters. You can swing a 35-inch platter off the outboard end of the spindle. The Grizzly G0766 has a fixed headstock, so its maximum outboard work is limited to whatever the 22-inch swing allows.

If you plan to turn platters over 20 inches regularly, the sliding headstock on the 3520C is a functional difference worth the premium. If you turn bowls and smaller face work, the fixed headstock is not a limitation.

How to decide

The clearest decision framework is project size. Work backward from the biggest piece you plan to turn regularly, not the biggest piece you might ever turn.

Regular 10-inch bowls: midi lathe. Regular 14-inch bowls: Laguna Revo 1216 or Jet 1840EVS. Regular 18-inch bowls: Powermatic 3520C or Grizzly G0766. Regular furniture legs: full-size lathe with 36+ inches between centers.

For the detailed comparison between size classes, the midi vs full-size guide covers electrical, footprint, and weight alongside the capacity numbers. For the speed settings that pair with each size class, the lathe speed guide covers the safe RPM formula by blank diameter.

A collection of finished turned wooden bowls in various sizes showing the range of project sizes possible on a lathe — Choosing the right size class means buying for the work you do most often. The upper range of any lathe's capacity is used rarely; the comfortable middle is used constantly. Credit: Puddin Tain via Flickr (CC BY-SA 2.0).