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Woodworking Math

Scroll saw blade chart: sizes, teeth per inch and speeds

What a scroll saw blade number means in teeth per inch, which stock each size suits, what the blade types do, and how fast saw makers say to run them.

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Blade numbers and teeth per inch

A blade number is not a standard: each maker sets its own teeth per inch (TPI) for a number. Olson’s #5 skip-tooth blade has 12.5 TPI, where Pegas’s has 16.9 and Flying Dutchman’s 16.5. So each maker is shown beside the median, or beside the mean of the two that print a number. A number only one maker prints is left out. The stock range is Pegas’s, for its own Skip blades.

Skip-tooth blades: TPI by blade number
BladeTPIOlsonPegasFlying DutchmanPegas stockSources
#2/028.22828.230.5.06"–1/4" (1.5–6 mm)

Median of 3 sources

#124.35—22.7261/10"–1/3" (2.5–8 mm)

Only two sources publish this: Pegas and Flying Dutchman (Mike’s Workshop)

#220.52021—1/8"–2/5" (3–10 mm)

Only two sources publish this: Olson Saw and Pegas

#320—19.520.51/6"–2/5" (4–10 mm)

Only two sources publish this: Pegas and Flying Dutchman (Mike’s Workshop)

#416.551518.1—1/5"–1/2" (5–12 mm)

Only two sources publish this: Olson Saw and Pegas

#516.512.516.916.51/3"–3/5" (8–15 mm)

Median of 3 sources

#71411.514.9142/5"–4/5" (10–20 mm)

Median of 3 sources

#913.411.513.4141/2"–1" (12–25 mm)

Median of 3 sources

#1211.59.511.5134/5"–2" (20–50 mm)

Median of 3 sources

Read 2026-11-08: Olson Saw, Scroll saw blade selection chart (2020): skip, double tooth, reverse, spiral and pin-end blades; Pegas, Scroll sawblade selection chart: Skip, Skip Reverse, Double Skip and Spiral, with stock thickness; Flying Dutchman (Mike’s Workshop), Polar scroll saw blades: TPI by blade number.

Blade types

Skip-tooth, double-tooth, reverse-tooth and spiral blades, and pin-end against plain-end. The makers disagree on double-tooth blades, so both sides are given.

  • Blade numbers run fine to coarse: a lower number is narrower with more teeth, for thin stock and tight turns; a higher number is for thicker stock.

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

  • Scroll saw blades are 5" (about 130 mm) long.

    4 sources agree , sources [1, 2, 4, 5]

  • Skip-tooth blades are the general-purpose blade.

    Two sources: Olson Saw and Pegas , sources [1, 2]

  • Blades with reverse teeth have a few teeth at the bottom pointing up; they cut on the upstroke and stop splintering on the underside of the work.

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

  • Olson sets its reverse-tooth blades so 1–2 reverse teeth show above the table on the upstroke.

    One source: Olson Saw, the maker of those blades , sources [1]

  • Flying Dutchman warns that too many reverse teeth can burn the wood.

    One source: Flying Dutchman (Mike’s Workshop), the maker of those blades , sources [3]

  • Double-tooth blades suit hard wood.

    Two sources: Olson Saw and Flying Dutchman (Mike’s Workshop) , sources [1, 3]

  • Pegas calls its double-skip blades excellent for soft woods, saying the wider gaps clear the chips and stop the wood burning.

    One source: Pegas, the maker of those blades , sources [2]

  • Spiral blades have teeth all the way round, so they cut in any direction without turning the work.

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

  • Pegas says its spiral blades leave a rough finish.

    One source: Pegas, the maker of those blades , sources [2]

  • Blades are pin-end (a cross pin at each end) or plain end (no pins); a saw takes the kind its blade holders are made for, or the other with adapters.

    3 sources agree , sources [1, 6, 5]

  • Fit the blade with its teeth pointing down, toward the table.

    Two sources: Grizzly Industrial and WEN , sources [6, 5]

  • Feed evenly and let the blade do the cutting rather than forcing it.

    3 sources agree , sources [1, 6, 5]

Sources

  1. Olson Saw, Scroll saw blade selection chart (2020): skip, double tooth, reverse, spiral and pin-end blades, read 2026-11-08
  2. Pegas, Scroll sawblade selection chart: Skip, Skip Reverse, Double Skip and Spiral, with stock thickness, read 2026-11-08
  3. Flying Dutchman (Mike’s Workshop), Choosing a blade, read 2026-11-08
  4. Flying Dutchman (Mike’s Workshop), Polar scroll saw blades: TPI by blade number, read 2026-11-08
  5. WEN, 3921 16" variable speed scroll saw manual (2023-12-15): blade selection, p. 12, read 2026-11-08
  6. Grizzly Industrial, Model G0734/G0735 16" scroll saw owner’s manual (mfd. since 12/15): blade speed and selection, pp. 22–24, read 2026-11-08

Blade speed

Saw makers give speed in strokes per minute (SPM) by blade, each for its own saw. Grizzly and Ryobi run finer blades and thinner stock slower. WEN runs its finer blades faster. They disagree, so no single speed is given: start from your own saw’s manual.

Grizzly G0734 (550–1,650 SPM)
Blade TPISPMFor
101,200–1,650General cutting, hard and soft woods 3/16"–2"
15700–1,200Thin wood and plastic 3/32"–1/2"
18550–700Tight turns in thin wood 3/32"–1/8"
Ryobi SC164VS (400–1,600 SPM)
Blade TPISPMFor
101,200–1,600Hard and soft woods 3/16"–2"
15600–1,200Very thin cuts in wood and plastic 3/32"–1/2"
18400–600Tight turns in thin material 3/32"–1/8"
WEN 3921 (550–1,600 SPM)
Blade TPISPMFor
10–15500–1,200Medium turns in 1/4"–1-3/4" wood
15–28800–1,700Small turns in 1/8"–1-1/2" wood

Read 2026-11-08, each maker for its own saw: Grizzly Industrial, Model G0734/G0735 16" scroll saw owner’s manual (mfd. since 12/15): blade speed and selection, pp. 22–24; Ryobi, SC164VS scroll saw operator’s manual: choice of blade and speed; WEN, 3921 16" variable speed scroll saw manual (2023-12-15): blade selection, p. 12.