Xem Studiomeasured geometry

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Swing arm / link 30 mm, Ø3 hole one end, Ø6 the other

What is this 30 mm arm? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: swing arm, link 30 mm, brazo oscilante de 30 mm, Schwingarm 30 mm

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

length
40.0 mm
width
10.0 mm
height
5.0 mm

Notes

  • 10 × 5 mm bar with a Ø3 hole and, 30 mm away, a Ø6 hole: used twice in the eccentric gear drive, as the arm that swings the pinion's Ø6 axle about a fixed Ø3 pin and as the link from the gear's Ø3 centre stud to that axle.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Swing arm / link 30 mm, Ø3 hole one end, Ø6 the other size chart

dimensionvalue
centres30 mm
holesØ3 and Ø6
section10 × 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. 222: figure, his text and an animationwebPublisher's page; dimensions are facts
Xem StudiodrawingwebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

swing-arm-30-holes-3-6Ø3 at (−15, 0), Ø6 at (15, 0), 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=swing-arm-30-holes-3-and-6

Swing arm / link 30 mm, Ø3 hole one end, Ø6 the other, isometric render of a generated part
Render of swing-arm-30-holes-3-6 from the free STEP; not to scale.

Fits with

Eccentric spur gear and pinion on a swinging arm (variable speed), isometric render of a generated part
Eccentric spur gear and pinion on a swinging arm (variable speed)4 sizes★ 1 file

Questions

What is this 30 mm arm?

10 × 5 mm bar with a Ø3 hole and, 30 mm away, a Ø6 hole: used twice in the eccentric gear drive, as the arm that swings the pinion's Ø6 axle about a fixed Ø3 pin and as the link from the gear's Ø3 centre stud to that axle.