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Ross yoke crank disc Ø24, 6 mm throw
What crank disc drives a Ross yoke? · Hardware · basis: Solved Ross linkage: crank throw e = 6
Long Earth Society build part. The parallel-cylinder alpha, solved. The engines
Exact dimensions. Every file is drawn at true size with no printing tolerance. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your printer's or process's clearance before making the part. Mating features
- sizes
- 5 in table
Notes
- The crank that drives the Ross yoke: Ø24 × 6, Ø5 bore (fit: slide) for the crankshaft, Ø2.5 radial hole (M3 tap size) for the grub screw.
- One Ø3 hole (fit: press) at 6 mm takes a Ø3 × 20 crank pin; the yoke's bottom vertex rides on it, and a 3 mm collar holds it on.
Sizes
| parameter | value |
|---|---|
| disc | Ø24 × 6 |
| bore | Ø5 |
| throw | 6 |
| pin hole | Ø3 |
| grub hole | Ø2.5 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance; leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| crank-disc bore | Ø5 | Ø5 crankshaft (M3 grub) | slide | ross-crank-disc-* |
| crank-disc pin hole | Ø3 | Ø3 crank pin | press | ross-crank-disc-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Ross yoke | web | CC BY-SA 4.0 (text) |
| Long Earth Society | Engine builds | web, video | LES site |
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
| ross-crank-disc-e6 | crank disc Ø24 × 6, Ø5 bore, Ø2.5 tap-drill hole for an M3 grub, Ø3 pin at 6 mm (the yoke rides on it) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=ross-crank-disc
How it fits
Goes in or on
Ross yoke alpha frame for two 10 mL syringeson the shaft beside the bossConnects to
Ross yoke a = h = 20 for two parallel syringesyoke's bottom vertex on the Ø3 pin
Crankshafts Ø3, Ø5 and Ø8 with full-length D-flatØ5 × 80 crankshaft, Ø3 × 20 pinAlso needed
Set screws, M3–M8M3 grubIn these build lists
Ross yoke alpha, two parallel 10 mL syringesTwo 10 mL syringe barrels side by side on a Ross yoke: a = h gives 90° between t…You might also need
Questions
What throw does the Ross yoke crank have?
6 mm; with a = h = 20 it gives piston strokes of 17.0 and 17.2 mm.
How is the Ross crank disc fixed to the shaft?
An M3 grub in the Ø2.5 radial hole onto the Ø5 shaft's D-flat.