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Cartwright crosshead bar, 30 mm pin spacing, centre rod hole

What is the crosshead in Cartwright's parallel motion? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: crosshead bar, cruceta, Kreuzkopfsteg

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

length
40.0 mm
width
10.0 mm
height
5.0 mm

Notes

  • 40 × 10 × 5 bar with Ø3 holes at −15, 0 and +15 mm: the two connecting rods pin to the outer holes, the guided rod to the centre one, which moves on a straight line.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Cartwright crosshead bar, 30 mm pin spacing, centre rod hole size chart

dimensionvalue
pin spacing30 mm
holes3 × Ø3
bar40 × 10 × 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. 328: 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

cartwright-crosshead-30crosshead bar, z 0..5STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=cartwright-crosshead-30

Cartwright crosshead bar, 30 mm pin spacing, centre rod hole, isometric render of a generated part
Render of cartwright-crosshead-30 from the free STEP; not to scale.

Fits with

Cartwright's parallel motion (twin gears and cranks), isometric render of a generated part
Cartwright's parallel motion (twin gears and cranks)4 sizes★ 1 file

Questions

What is the crosshead in Cartwright's parallel motion?

40 × 10 × 5 bar with Ø3 holes at −15, 0 and +15 mm: the two connecting rods pin to the outer holes, the guided rod to the centre one, which moves on a straight line.