Metric shafts Ø3 to Ø10 with D-flats and clip grooves
What does a 5 mm or 8 mm shaft with a D-flat and clip grooves look like dimensionally? · Hardware · basis: Round shafts at nominal Ø; D-flat 0.1 × d deep over 20 mm at one end; DIN 6799 and DIN 471 groove sizes
Long Earth Society build part. Flywheel and crank shafts with their clips and collars. 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
- 10 in table
Notes
- Round shafts at nominal Ø with 0.5 × 45° chamfers on both ends: Ø3 × 100, Ø4 × 100, Ø5 × 100 and × 200, Ø6 × 150, Ø8 × 200 and × 300, Ø10 × 200.
- The Ø5, Ø6 and Ø8 shafts carry a D-flat 0.1 × d deep and 20 mm long at one end: 4.5, 5.4 and 7.2 across the flat. A set screw seats on it.
- shaft-8x100-grooved: Ø8 × 100 with DIN 471 circlip grooves Ø7.6 × 0.9 starting 10 and 88 mm from the end, and the 20 mm D-flat. shaft-5x80-grooved: Ø5 × 80 with DIN 6799 E-clip grooves Ø4.0 × 0.7 at 8 and 70 mm, and the D-flat.
- For the full-length D-flat crankshafts, see the Stirling crankshafts page; these shafts have the short motor-style flat.
Sizes
| file | Ø | length | D-flat | grooves |
|---|---|---|---|---|
| shaft-3x100 | 3 | 100 | — | — |
| shaft-4x100 | 4 | 100 | — | — |
| shaft-5x100 | 5 | 100 | 0.5 × 20 (4.5 across) | — |
| shaft-5x200 | 5 | 200 | 0.5 × 20 (4.5 across) | — |
| shaft-6x150 | 6 | 150 | 0.6 × 20 (5.4 across) | — |
| shaft-8x200 | 8 | 200 | 0.8 × 20 (7.2 across) | — |
| shaft-8x300 | 8 | 300 | 0.8 × 20 (7.2 across) | — |
| shaft-10x200 | 10 | 200 | — | — |
| shaft-8x100-grooved | 8 | 100 | 0.8 × 20 | DIN 471 Ø7.6 × 0.9 at 10, 88 |
| shaft-5x80-grooved | 5 | 80 | 0.5 × 20 | DIN 6799 Ø4.0 × 0.7 at 8, 70 |
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 |
|---|---|---|---|---|
| shaft Ø | Ø3 / 4 / 5 / 6 / 8 / 10 | bores of the mating parts | slide | shaft-* |
| D-flat | 0.1 d deep × 20 (Ø5 → 4.5 across) | set screw | designed | shaft-* |
| clip grooves | DIN 6799 Ø4.0 × 0.7 / DIN 471 Ø7.6 × 0.9 | E-clip / circlip | designed | shaft-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Circlip | web | CC BY-SA 4.0 (text) |
| Wikipedia | Retaining ring | web | CC BY-SA 4.0 (text) |
| McMaster-Carr | Shaft collars (free STEP per part, for your own design use; no redistribution) | STEP, PDF | McMaster-Carr site terms verify |
| McMaster-Carr | Retaining rings (free STEP per part, for your own design use; no redistribution) | STEP, PDF | McMaster-Carr site terms verify |
| Long Earth Society | Engine and rig builds | web, video | LES site |
Free files
★ Free files 10 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| shaft-3x100 | precision shaft Ø3 × 100 | STEP · STL |
| shaft-4x100 | precision shaft Ø4 × 100 | STEP · STL |
| shaft-5x100 | precision shaft Ø5 × 100 with a 20 mm D-flat, 0.5 deep (4.5 across the flat) | STEP · STL |
| shaft-5x200 | precision shaft Ø5 × 200 with a 20 mm D-flat, 0.5 deep (4.5 across the flat) | STEP · STL |
| shaft-6x150 | precision shaft Ø6 × 150 with a 20 mm D-flat, 0.6 deep (5.4 across the flat) | STEP · STL |
| shaft-8x200 | precision shaft Ø8 × 200 with a 20 mm D-flat, 0.8 deep (7.2 across the flat) | STEP · STL |
| shaft-8x300 | precision shaft Ø8 × 300 with a 20 mm D-flat, 0.8 deep (7.2 across the flat) | STEP · STL |
| shaft-10x200 | precision shaft Ø10 × 200 | STEP · STL |
| shaft-8x100-grooved | Ø8 × 100 with DIN 471 circlip grooves (Ø7.6 × 0.9) at 10 and 88 mm and a 20 mm D-flat, 0.8 deep | STEP · STL |
| shaft-5x80-grooved | Ø5 × 80 with DIN 6799 E-clip grooves (Ø4.0 × 0.7) at 8 and 70 mm and a 20 mm D-flat, 0.5 deep | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=metric-shafts

How it fits
Parts that fit it
Goes in or on
Connects to
Alternatives
Also needed
You might also need
Questions
How deep is a D-flat on a 5 mm shaft?
0.5 mm (4.5 across the flat), 20 mm long at one end on these files.
Where are the grooves on the grooved 8 mm shaft?
DIN 471 circlip grooves Ø7.6 × 0.9 at 10 and 88 mm from the end of the Ø8 × 100 shaft.
