Xem Studiomeasured geometryLibrary › Mechanisms › Belt and friction drives ·
Shaft carried on the rims of two pairs of wheels (anti-friction bearing)
What is a friction-wheel bearing? · Hardware · basis: Xem Studio design following Brown No. 250 (1868)
Also called: friction wheel bearing, anti friction rollers, roller bearing (early), cojinete de ruedas antifricción, Friktionsrollenlager
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 4 in table
Notes
- Instead of turning in a plain bearing, the shaft lies in the angle between the rims of two wheels whose axles are parallel to it: as the shaft turns, the wheels turn with it, and the sliding friction of a journal becomes rolling friction at the rims plus a small journal friction at the wheels' axles, reduced in the ratio of their diameters.
- Here a Ø10 shaft on Ø40 wheels with axles 44 mm apart: the shaft's centre is 11.87 mm above the axles, touching each rim on a line. Two pairs, 70 mm apart along the shaft.
- Brown's No. 250 (anti-friction bearing: the shaft running on the circumferences of two wheels).
- Parts (each has its own page): anti-friction-wheel-40x10-bore8, linear-shafts-h6.
- Brown's movement No. 250 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.
Shaft carried on the rims of two pairs of wheels size chart
| parameter | value |
|---|---|
| shaft | Ø10 |
| wheels | 4 × Ø40 × 10 |
| axle spacing | 44 mm |
| shaft height | 11.87 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.org | web | Publisher's page; dimensions are facts |
| 507movements.com | Brown's movement No. 250: figure, his text and an animation | web | Publisher'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
| anti-friction-wheel-bearing-mechanism-assembly | Assembled mechanism, all parts placed at one pose (STEP keeps each part separate) | STEP · STL |
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.Plain text: sheet.txt · JSON: /api/geometry?object=anti-friction-wheel-bearing-mechanism
Fits with
Questions
What is a friction-wheel bearing?
Instead of turning in a plain bearing, the shaft lies in the angle between the rims of two wheels whose axles are parallel to it: as the shaft turns, the wheels turn with it, and the sliding friction of a journal becomes rolling friction at the rims plus a small journal friction at the wheels' axles, reduced in the ratio of their diameters.