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Woodworking Math

Woodturning for beginners

Woodturning shapes wood while a lathe spins it: spindle work between the two centers (chair legs, handles, pens) and faceplate or bowl work held at one end. This guide gathers what the lathe makers’ own manuals say to do every time, the speed to run, and which woods the USDA Wood Handbook says turn well.

Lathe safety, from the makers’ manuals

Grizzly, Shop Fox and JET each print a safety list for their wood lathes. The rules all three give come first; the others are rules two of them give. Your own lathe’s manual is the authority for your lathe.

  • Wear a face shield, or at least safety glasses, whenever the lathe runs.

    3 sources agree , sources [1, 2, 3]

  • Check every blank for knots, splits and cracks before mounting it, and don’t turn one that has them.

    3 sources agree , sources [1, 2, 3]

  • Turn the work by hand through a full turn to check it clears the tool rest before switching on.

    3 sources agree , sources [1, 2, 3]

  • Set the speed to suit the work, and let the lathe reach that speed before cutting.

    3 sources agree , sources [1, 2, 3]

  • Keep long hair, loose sleeves and jewellery away from the spinning work.

    3 sources agree , sources [1, 2, 3]

  • Never slow or stop the work with your hand; let it stop on its own.

    3 sources agree , sources [1, 2, 3]

  • Start a new setup at the lowest speed and bring it up.

    Two sources: Woodstock International (Shop Fox) and JET (JPW Industries) , sources [2, 3]

  • Don’t wear gloves at the lathe.

    Two sources: Woodstock International (Shop Fox) and JET (JPW Industries) , sources [2, 3]

  • Saw off corners and waste before mounting, so the blank runs without heavy wobble.

    Two sources: Woodstock International (Shop Fox) and JET (JPW Industries) , sources [2, 3]

  • Take the tool rest away before sanding or polishing the spinning work.

    Two sources: Grizzly Industrial and Woodstock International (Shop Fox) , sources [1, 2]

  • Keep turning tools sharp and hold them firmly on the tool rest.

    Two sources: Grizzly Industrial and Woodstock International (Shop Fox) , sources [1, 2]

Sources

  1. Grizzly Industrial, Model G0632 16" × 42" wood lathe owner’s manual: additional safety for wood lathes (p. 10), read 2026-11-07
  2. Woodstock International (Shop Fox), Model W1852 22" × 42" wood lathe owner’s manual: additional safety for wood lathes (p. 9), read 2026-11-07
  3. JET (JPW Industries), JWL-1221VS woodworking lathe operating instructions: safety, spindle and bowl turning (pp. 4–5, 15–18), read 2026-11-07

How fast to run the lathe

The right speed depends on the blank’s diameter and whether you are roughing or finishing. The lathe speed calculator gives the median of three lathe makers’ charts for any diameter. Federal workplace rules for wood lathes are on the woodworking machine safety page.

Woods the Wood Handbook says turn well

These are the species whose Wood Handbook descriptions say they turn well or go into turned goods and turnery, softest first. Each links to its page, with its weight, movement and the Handbook’s description.

Turning woods named in the Wood Handbook, softest first
WoodJanka hardness at 12% MC
Aspen350 lbf
Mahogany800 lbf
Paper birch910 lbf
Birch1,260 lbf
Beech1,300 lbf
Ramin1,300 lbf
Peroba rosa1,730 lbf
Purpleheart1,860 lbf
Goncalo alves2,160 lbf
Mora2,300 lbf
Jatoba2,350 lbf
Bubinga2,690 lbf
Brazilian rosewood2,720 lbf
Indian rosewood3,170 lbf
Ipe3,680 lbf
Lignum vitae4,500 lbf
MerbauNot given at 12%
OvangkolNot given at 12%