Xem Studiomeasured geometry

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Oblique (swash) disc reciprocating a rod parallel to the shaft

How does a swash plate make a rod reciprocate? · Hardware · basis: Xem Studio design following Brown No. 95 (1868)

Also called: swash plate, wobble plate, oblique disc cam, plato oscilante, Taumelscheibe

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

sizes
3 in table

Notes

  • A disc fixed obliquely on a shaft: a rod parallel to the shaft, pressed against the disc's face, moves up and down once per turn — stroke 2 r tan θ at radius r (here 2 × 14 × tan 15° = 7.5 mm).
  • Catalog Ø40 × 15° swash plate and ball-ended follower; follower at 14 mm radius in a square guide, its Ø8 ball touching the face (centre 4.53 mm above the plate's hub centre).
  • Brown's No. 95 (oblique disc on an upright shaft giving reciprocating motion to a rod resting on it).
  • Parts (each has its own page): swash-plate, swash-follower-guide-sq8, linear-shafts-h6.
  • Brown's movement No. 95 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

Oblique (swash) disc reciprocating a rod parallel to the shaft size chart

parametervalue
plateØ40, 15°
follower radius14 mm
stroke7.5 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. 95: figure, his text and an animationwebPublisher'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

swash-plate-rod-mechanism-assemblyAssembled mechanism, all parts placed at one pose (STEP keeps each part separate)STEP · 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=swash-plate-rod-mechanism

Oblique (swash) disc reciprocating a rod parallel to the shaft, isometric render of a generated part
Render of swash-plate-rod-mechanism-assembly from the free STEP; not to scale.

Fits with

Swash (wobble) plates Ø40 at 10, 15 and 20°, isometric render of a generated part
Swash (wobble) plates Ø40 at 10, 15 and 20°3 sizes★ 3 files
Follower guide 20 × 20 × 10 with an 8 × 8 square hole, isometric render of a generated part
Follower guide 20 × 20 × 10 with an 8 × 8 square hole20.0×20.0×10.0 mm★ 1 file
Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long, isometric render of a generated part
Linear shafts Ø3 to Ø25 mm (h6), 100 to 1000 mm long10 sizes★ 70 files

Questions

How does a swash plate make a rod reciprocate?

A disc fixed obliquely on a shaft: a rod parallel to the shaft, pressed against the disc's face, moves up and down once per turn — stroke 2 r tan θ at radius r (here 2 × 14 × tan 15° = 7.5 mm).