Xem Studiomeasured geometry

Library › Hardware › Motion ·

Spur gears, module 1.5: 10 to 80 teeth (20° involute)

What is the pitch diameter of a module 1.5 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 1.5 gears = m × (N1 + N2) / 2. Face width 12 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
1015.018.011.2512.04
1218.021.014.2512.05
1421.024.017.2512.06
1522.525.518.7512.07
1624.027.020.2512.07
1827.030.023.2512.08
2030.033.026.2512.09
2233.036.029.2512.010
2436.039.032.2512.011
2537.540.533.7512.012
2842.045.038.2512.013
3045.048.041.2512.014
3248.051.044.2512.015
3552.555.548.7512.017
3654.057.050.2512.018
4060.063.056.2512.020
4263.066.059.2512.021
4567.570.563.7512.022
4872.075.068.2512.024
5075.078.071.2512.025
5684.087.080.2512.025
6090.093.086.2512.025
6496.099.092.2512.025
70105.0108.0101.2512.025
72108.0111.0104.2512.025
80120.0123.0116.2512.025

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-m1-5-10tmodule 1.5, 10 teeth: pitch Ø15, tip Ø18, root Ø11.25, face 12, bore Ø4STEP · STL
gear-m1-5-12tmodule 1.5, 12 teeth: pitch Ø18, tip Ø21, root Ø14.25, face 12, bore Ø5STEP · STL
gear-m1-5-14tmodule 1.5, 14 teeth: pitch Ø21, tip Ø24, root Ø17.25, face 12, bore Ø6STEP · STL
gear-m1-5-15tmodule 1.5, 15 teeth: pitch Ø22.5, tip Ø25.5, root Ø18.75, face 12, bore Ø7STEP · STL
gear-m1-5-16tmodule 1.5, 16 teeth: pitch Ø24, tip Ø27, root Ø20.25, face 12, bore Ø7STEP · STL
gear-m1-5-18tmodule 1.5, 18 teeth: pitch Ø27, tip Ø30, root Ø23.25, face 12, bore Ø8STEP · STL
gear-m1-5-20tmodule 1.5, 20 teeth: pitch Ø30, tip Ø33, root Ø26.25, face 12, bore Ø9STEP · STL
gear-m1-5-22tmodule 1.5, 22 teeth: pitch Ø33, tip Ø36, root Ø29.25, face 12, bore Ø10STEP · STL
gear-m1-5-24tmodule 1.5, 24 teeth: pitch Ø36, tip Ø39, root Ø32.25, face 12, bore Ø11STEP · STL
gear-m1-5-25tmodule 1.5, 25 teeth: pitch Ø37.5, tip Ø40.5, root Ø33.75, face 12, bore Ø12STEP · STL
gear-m1-5-28tmodule 1.5, 28 teeth: pitch Ø42, tip Ø45, root Ø38.25, face 12, bore Ø13STEP · STL
gear-m1-5-30tmodule 1.5, 30 teeth: pitch Ø45, tip Ø48, root Ø41.25, face 12, bore Ø14STEP · STL
gear-m1-5-32tmodule 1.5, 32 teeth: pitch Ø48, tip Ø51, root Ø44.25, face 12, bore Ø15STEP · STL
gear-m1-5-35tmodule 1.5, 35 teeth: pitch Ø52.5, tip Ø55.5, root Ø48.75, face 12, bore Ø17STEP · STL
gear-m1-5-36tmodule 1.5, 36 teeth: pitch Ø54, tip Ø57, root Ø50.25, face 12, bore Ø18STEP · STL
gear-m1-5-40tmodule 1.5, 40 teeth: pitch Ø60, tip Ø63, root Ø56.25, face 12, bore Ø20STEP · STL
gear-m1-5-42tmodule 1.5, 42 teeth: pitch Ø63, tip Ø66, root Ø59.25, face 12, bore Ø21STEP · STL
gear-m1-5-45tmodule 1.5, 45 teeth: pitch Ø67.5, tip Ø70.5, root Ø63.75, face 12, bore Ø22STEP · STL
gear-m1-5-48tmodule 1.5, 48 teeth: pitch Ø72, tip Ø75, root Ø68.25, face 12, bore Ø24STEP · STL
gear-m1-5-50tmodule 1.5, 50 teeth: pitch Ø75, tip Ø78, root Ø71.25, face 12, bore Ø25STEP · STL
gear-m1-5-56tmodule 1.5, 56 teeth: pitch Ø84, tip Ø87, root Ø80.25, face 12, bore Ø25STEP · STL
gear-m1-5-60tmodule 1.5, 60 teeth: pitch Ø90, tip Ø93, root Ø86.25, face 12, bore Ø25STEP · STL
gear-m1-5-64tmodule 1.5, 64 teeth: pitch Ø96, tip Ø99, root Ø92.25, face 12, bore Ø25STEP · STL
gear-m1-5-70tmodule 1.5, 70 teeth: pitch Ø105, tip Ø108, root Ø101.25, face 12, bore Ø25STEP · STL
gear-m1-5-72tmodule 1.5, 72 teeth: pitch Ø108, tip Ø111, root Ø104.25, face 12, bore Ø25STEP · STL
gear-m1-5-80tmodule 1.5, 80 teeth: pitch Ø120, tip Ø123, root Ø116.25, face 12, bore Ø25STEP · STL
Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.
Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=spur-gears-module-1-5

Spur gears, module 1.5: 10 to 80 teeth (20° involute), isometric render of a generated part
Render of gear-m1-5-35t 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 2: 10 to 80 teeth (20° involute), isometric render of a generated part
Spur gears, module 2: 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 1.5, 20-tooth gear?

30 mm; tip 33 mm.

Centre distance?

m × (N1 + N2) / 2: a 20 and a 40 tooth module 1.5 pair sit 45 mm apart.