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Centre-hole link, 80 mm (three Ø3 holes: −40, 0, +40)

What is a centre-hole link? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: scissor link, lazy tongs bar, three hole link, eslabón de tres agujeros, Dreilochlasche

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

length
90.0 mm
width
10.0 mm
height
5.0 mm

Notes

  • 10 × 5 mm flat link, 80 mm between its end holes, with a third Ø3 hole in the middle: the bar of lazy tongs, parallel rulers, the Scott Russell linkage and the elliptic trammel.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Centre-hole link, 80 mm size chart

dimensionvalue
end hole centres80 mm
holes3 × Ø3 at −40, 0, +40 mm
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. 144: 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

centre-hole-link-80link, 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.
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Plain text: sheet.txt · JSON: /api/geometry?object=centre-hole-link-80

Centre-hole link, 80 mm (three Ø3 holes: −40, 0, +40), isometric render of a generated part
Render of centre-hole-link-80 from the free STEP; not to scale.

Fits with

Lazy tongs (three-cell scissor linkage), isometric render of a generated part
Lazy tongs (three-cell scissor linkage)4 sizes★ 1 file
Scott Russell straight-line linkage (half-scissor), isometric render of a generated part
Scott Russell straight-line linkage (half-scissor)4 sizes★ 1 file
Elliptic trammel (trammel of Archimedes, ellipsograph), isometric render of a generated part
Elliptic trammel (trammel of Archimedes, ellipsograph)4 sizes★ 1 file
Parallel ruler with crossed arms and slots, isometric render of a generated part
Parallel ruler with crossed arms and slots3 sizes★ 1 file

Questions

What is a centre-hole link?

10 × 5 mm flat link, 80 mm between its end holes, with a third Ø3 hole in the middle: the bar of lazy tongs, parallel rulers, the Scott Russell linkage and the elliptic trammel.