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Ball-joint cap: Ø40 × 8 ring with an R15 spherical seat and 3 × Ø3.4 holes

What holds the ball in the socket? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: ball joint cap, gland ring, tapa de rótula, Kugelgelenk-Deckel

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

length
40.0 mm
width
40.0 mm
height
8.0 mm

Notes

  • Ø40 × 8 ring whose bore is the R15 sphere between z 0 and 8 (opening Ø25.38 at the top, smaller than the Ø30 ball), so screwed down on the socket it holds the ball in; three Ø3.4 holes for M3 screws.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Ball-joint cap: Ø40 × 8 ring with an R15 spherical seat and 3 × Ø3.4… size chart

dimensionvalue
ringØ40 × 8
seatR15 sphere
openingØ25.38
holes3 × Ø3.4 on Ø32

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. 249: 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

ball-joint-cap-d40-r15cap, sphere centre at the origin, z 0..8STEP · 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=ball-joint-cap-d40-r15

Ball-joint cap: Ø40 × 8 ring with an R15 spherical seat and 3 × Ø3.4 holes, isometric render of a generated part
Render of ball-joint-cap-d40-r15 from the free STEP; not to scale.

Fits with

Ball-and-socket joint for tubing, isometric render of a generated part
Ball-and-socket joint for tubing4 sizes★ 1 file

Questions

What holds the ball in the socket?

Ø40 × 8 ring whose bore is the R15 sphere between z 0 and 8 (opening Ø25.38 at the top, smaller than the Ø30 ball), so screwed down on the socket it holds the ball in; three Ø3.4 holes for M3 screws.