Xem Studiomeasured geometry

Library › Mechanisms › Gears ·

Slotted guide bar 150 × 30 × 6, Ø8 pivot hole and 8 mm slot for a sliding pinion shaft

What does the slotted bar do? · Modern device · basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance

Also called: slotted bar, guide bar, barra ranurada, Schlitzführung

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

length
150.0 mm
width
30.0 mm
height
6.0 mm

Notes

  • Fixed bar with a Ø8 hole for the elliptical gear's shaft and, on the same line, an 8 mm slot from 32.53 to 48.2 mm along it: the pinion's Ø8 shaft slides in the slot so the pinion follows the gear's changing radius (its centre travels 36.53 – 44.2 mm from the gear's centre); a spring or weight keeps it in mesh.
  • Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

Slotted guide bar 150 × 30 × 6, Ø8 pivot hole and 8 mm slot for a… size chart

dimensionvalue
bar150 × 30 × 6 mm
pivotØ8 at 0
slot8 mm, centres 32.53 … 48.2 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. 35: 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

slotted-guide-bar-150-slot8-ellipticalbar, pivot at origin, slot along +X, z 0..6STEP · 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=slotted-guide-bar-150-slot8-elliptical

Slotted guide bar 150 × 30 × 6, Ø8 pivot hole and 8 mm slot for a sliding pinion shaft, isometric render of a generated part
Render of slotted-guide-bar-150-slot8-elliptical from the free STEP; not to scale.

Fits with

Elliptical gear driving a pinion whose shaft slides in a slotted bar, isometric render of a generated part
Elliptical gear driving a pinion whose shaft slides in a slotted bar4 sizes★ 1 file

Questions

What does the slotted bar do?

Fixed bar with a Ø8 hole for the elliptical gear's shaft and, on the same line, an 8 mm slot from 32.53 to 48.2 mm along it: the pinion's Ø8 shaft slides in the slot so the pinion follows the gear's changing radius (its centre travels 36.53 – 44.2 mm from the gear's centre); a spring or weight keeps it in mesh.