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Spur gears, module 3: 10 to 80 teeth (20° involute)

What is the pitch diameter of a module 3 spur gear? · Hardware · basis: ISO 53 basic rack: 20° pressure angle, addendum m, dedendum 1.25 m; pitch Ø = m × teeth, tip Ø = m × (teeth + 2), root Ø = m × (teeth − 2.5)

Exact dimensions. True size, with no printing tolerance added.

sizes
26 in table

Notes

  • Centre distance of two module 3 gears = m × (N1 + N2) / 2. Face width 24 mm, plain bore (add a hub, key or set screw to suit). Teeth below 17 are drawn without profile shift, so they undercut as real unshifted gears do.

Sizes

teethpitch_dia_mmtip_dia_mmroot_dia_mmface_mmbore_mm
1030.036.022.524.08
1236.042.028.524.010
1442.048.034.524.012
1545.051.037.524.013
1648.054.040.524.014
1854.060.046.524.016
2060.066.052.524.018
2266.072.058.524.020
2472.078.064.524.023
2575.081.067.524.024
2884.090.076.524.025
3090.096.082.524.025
3296.0102.088.524.025
35105.0111.097.524.025
36108.0114.0100.524.025
40120.0126.0112.524.025
42126.0132.0118.524.025
45135.0141.0127.524.025
48144.0150.0136.524.025
50150.0156.0142.524.025
56168.0174.0160.524.025
60180.0186.0172.524.025
64192.0198.0184.524.025
70210.0216.0202.524.025
72216.0222.0208.524.025
80240.0246.0232.524.025

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

ISOISO 53 standard basic rack (20° pressure angle, addendum 1 m, dedendum 1.25 m) and ISO 54 modulesstandardISO; dimensions are facts verify

Free files

★ Free files 26 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

gear-m3-10tmodule 3, 10 teeth: pitch Ø30, tip Ø36, root Ø22.5, face 24, bore Ø8STEP · STL
gear-m3-12tmodule 3, 12 teeth: pitch Ø36, tip Ø42, root Ø28.5, face 24, bore Ø10STEP · STL
gear-m3-14tmodule 3, 14 teeth: pitch Ø42, tip Ø48, root Ø34.5, face 24, bore Ø12STEP · STL
gear-m3-15tmodule 3, 15 teeth: pitch Ø45, tip Ø51, root Ø37.5, face 24, bore Ø13STEP · STL
gear-m3-16tmodule 3, 16 teeth: pitch Ø48, tip Ø54, root Ø40.5, face 24, bore Ø14STEP · STL
gear-m3-18tmodule 3, 18 teeth: pitch Ø54, tip Ø60, root Ø46.5, face 24, bore Ø16STEP · STL
gear-m3-20tmodule 3, 20 teeth: pitch Ø60, tip Ø66, root Ø52.5, face 24, bore Ø18STEP · STL
gear-m3-22tmodule 3, 22 teeth: pitch Ø66, tip Ø72, root Ø58.5, face 24, bore Ø20STEP · STL
gear-m3-24tmodule 3, 24 teeth: pitch Ø72, tip Ø78, root Ø64.5, face 24, bore Ø23STEP · STL
gear-m3-25tmodule 3, 25 teeth: pitch Ø75, tip Ø81, root Ø67.5, face 24, bore Ø24STEP · STL
gear-m3-28tmodule 3, 28 teeth: pitch Ø84, tip Ø90, root Ø76.5, face 24, bore Ø25STEP · STL
gear-m3-30tmodule 3, 30 teeth: pitch Ø90, tip Ø96, root Ø82.5, face 24, bore Ø25STEP · STL
gear-m3-32tmodule 3, 32 teeth: pitch Ø96, tip Ø102, root Ø88.5, face 24, bore Ø25STEP · STL
gear-m3-35tmodule 3, 35 teeth: pitch Ø105, tip Ø111, root Ø97.5, face 24, bore Ø25STEP · STL
gear-m3-36tmodule 3, 36 teeth: pitch Ø108, tip Ø114, root Ø100.5, face 24, bore Ø25STEP · STL
gear-m3-40tmodule 3, 40 teeth: pitch Ø120, tip Ø126, root Ø112.5, face 24, bore Ø25STEP · STL
gear-m3-42tmodule 3, 42 teeth: pitch Ø126, tip Ø132, root Ø118.5, face 24, bore Ø25STEP · STL
gear-m3-45tmodule 3, 45 teeth: pitch Ø135, tip Ø141, root Ø127.5, face 24, bore Ø25STEP · STL
gear-m3-48tmodule 3, 48 teeth: pitch Ø144, tip Ø150, root Ø136.5, face 24, bore Ø25STEP · STL
gear-m3-50tmodule 3, 50 teeth: pitch Ø150, tip Ø156, root Ø142.5, face 24, bore Ø25STEP · STL
gear-m3-56tmodule 3, 56 teeth: pitch Ø168, tip Ø174, root Ø160.5, face 24, bore Ø25STEP · STL
gear-m3-60tmodule 3, 60 teeth: pitch Ø180, tip Ø186, root Ø172.5, face 24, bore Ø25STEP · STL
gear-m3-64tmodule 3, 64 teeth: pitch Ø192, tip Ø198, root Ø184.5, face 24, bore Ø25STEP · STL
gear-m3-70tmodule 3, 70 teeth: pitch Ø210, tip Ø216, root Ø202.5, face 24, bore Ø25STEP · STL
gear-m3-72tmodule 3, 72 teeth: pitch Ø216, tip Ø222, root Ø208.5, face 24, bore Ø25STEP · STL
gear-m3-80tmodule 3, 80 teeth: pitch Ø240, tip Ø246, root Ø232.5, face 24, bore Ø25STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=spur-gears-module-3

Spur gears, module 3: 10 to 80 teeth (20° involute), isometric render of a generated part
Render of gear-m3-35t from the free STEP; not to scale.

Fits with

Spur gears, module 0.5: 10 to 80 teeth (20° involute), isometric render of a generated part
Spur gears, module 0.5: 10 to 80 teeth (20° involute)26 sizes★ 26 files
Spur gears, module 0.8: 10 to 80 teeth (20° involute), isometric render of a generated part
Spur gears, module 0.8: 10 to 80 teeth (20° involute)26 sizes★ 26 files
Spur gears, module 1: 10 to 80 teeth (20° involute), isometric render of a generated part
Spur gears, module 1: 10 to 80 teeth (20° involute)26 sizes★ 26 files
Spur gears, module 1.25: 10 to 80 teeth (20° involute), isometric render of a generated part
Spur gears, module 1.25: 10 to 80 teeth (20° involute)26 sizes★ 26 files
Spur gears, module 1.5: 10 to 80 teeth (20° involute), isometric render of a generated part
Spur gears, module 1.5: 10 to 80 teeth (20° involute)26 sizes★ 26 files
Spur gears, involute 20°: module 0.5, 1 and 2, 12–60 teeth, isometric render of a generated part
Spur gears, involute 20°: module 0.5, 1 and 2, 12–60 teeth21 sizes★ 21 files

Questions

Pitch diameter of a module 3, 20-tooth gear?

60 mm; tip 66 mm.

Centre distance?

m × (N1 + N2) / 2: a 20 and a 40 tooth module 3 pair sit 90 mm apart.