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Sun-and-planet arm, 30 mm centres, Ø10 holes

What does the arm in a sun-and-planet gear do? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: sun and planet arm, planet arm, brazo de sol y planeta, Sonnen-und-Planeten-Arm

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

length
48.0 mm
width
18.0 mm
height
5.0 mm

Notes

  • 18 × 5 mm arm with two Ø10 holes 30 mm apart: it turns on the sun's Ø10 shaft and on the planet's boss and only keeps the two gears in mesh (centre distance 30 mm for two module 1, 30-tooth gears).
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Sun-and-planet arm, 30 mm centres, Ø10 holes size chart

dimensionvalue
centres30 mm
holes2 × Ø10
section18 × 5 mm

Where the files are

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

Henry T. Brown (1868, public domain)Five Hundred and Seven Mechanical Movements — scan on archive.orgwebPublisher's page; dimensions are facts
507movements.comBrown's movement No. 39: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

sun-and-planet-arm-30arm, z 0..5STEP · 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=sun-and-planet-arm-30

Sun-and-planet arm, 30 mm centres, Ø10 holes, isometric render of a generated part
Render of sun-and-planet-arm-30 from the free STEP; not to scale.

Fits with

Sun-and-planet gear (Watt's crank substitute), 30 : 30, isometric render of a generated part
Sun-and-planet gear (Watt's crank substitute), 30 : 304 sizes★ 1 file

Questions

What does the arm in a sun-and-planet gear do?

18 × 5 mm arm with two Ø10 holes 30 mm apart: it turns on the sun's Ø10 shaft and on the planet's boss and only keeps the two gears in mesh (centre distance 30 mm for two module 1, 30-tooth gears).