Xem Studiomeasured geometryClevises with M3 tapped shank: Ø3, Ø5 and Ø6 pins, 5 to 12 mm gaps
What are the dimensions of a small clevis fork for a pushrod? · Hardware · basis: Fork with a cross pin hole at the pin Ø and a gap equal to the link thickness; Ø8 shank boss tapped M3 (Ø2.5 tap drill)
Long Earth Society build part. Serviceable pivots on the LES linkages; a U-joint between engine and alternator when the shafts don't line up. 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
- A fork 18 long × 12 tall with two 4 mm tines; the gap between the tines is the link thickness and the cross hole is the pin Ø, 6 mm in from the open end at mid-height.
- A Ø8 × 10 shank boss on the closed end carries a Ø2.5 hole 10 deep, the M3 tap drill, for a threaded pushrod. Every file is 28 long overall.
- Sizes: Ø3 pin with a 5 or 8 mm gap; Ø5 pin with 8 or 10; Ø6 pin with 12. Width across the tines is gap + 8 (13, 16, 16, 18, 20).
Sizes
| file | pin hole Ø | gap | width | length | height | shank |
|---|---|---|---|---|---|---|
| clevis-3-gap5 | 3 | 5 | 13 | 28 | 12 | Ø8, M3 tap Ø2.5 × 10 |
| clevis-3-gap8 | 3 | 8 | 16 | 28 | 12 | Ø8, M3 tap Ø2.5 × 10 |
| clevis-5-gap8 | 5 | 8 | 16 | 28 | 12 | Ø8, M3 tap Ø2.5 × 10 |
| clevis-5-gap10 | 5 | 10 | 18 | 28 | 12 | Ø8, M3 tap Ø2.5 × 10 |
| clevis-6-gap12 | 6 | 12 | 20 | 28 | 12 | Ø8, M3 tap Ø2.5 × 10 |
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 |
|---|---|---|---|---|
| pin hole | Ø3 / Ø5 / Ø6 | clevis pin (turns in it) | run | clevis-* |
| fork gap | 5 / 8 / 10 / 12 | link of that thickness | run | clevis-* |
| shank thread hole | Ø2.5 | M3 tap drill (pushrod) | designed | clevis-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Clevis fastener | web | CC BY-SA 4.0 (text) |
| Wikipedia | Universal joint | web | CC BY-SA 4.0 (text) |
| Wikipedia | Rod end bearing | web | CC BY-SA 4.0 (text) |
| McMaster-Carr | Clevis pins (free STEP per part, for your own design use; no redistribution) | STEP, PDF | McMaster-Carr site terms verify |
| McMaster-Carr | Rod ends (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 5 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| clevis-3-gap5 | clevis for a Ø3 pin (Ø3 hole), 5 mm gap for a 5 mm link, M3 tapped shank (Ø2.5) | STEP · STL |
| clevis-3-gap8 | clevis for a Ø3 pin (Ø3 hole), 8 mm gap for a 8 mm link, M3 tapped shank (Ø2.5) | STEP · STL |
| clevis-5-gap8 | clevis for a Ø5 pin (Ø5 hole), 8 mm gap for a 8 mm link, M3 tapped shank (Ø2.5) | STEP · STL |
| clevis-5-gap10 | clevis for a Ø5 pin (Ø5 hole), 10 mm gap for a 10 mm link, M3 tapped shank (Ø2.5) | STEP · STL |
| clevis-6-gap12 | clevis for a Ø6 pin (Ø6 hole), 12 mm gap for a 12 mm link, M3 tapped shank (Ø2.5) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=clevises
How it fits
Connects to
Clevis pins ISO 2341 B, Ø3 to Ø8Ø3 / Ø5 / Ø6 pin across the fork
Four-bar linkslink of the gap's thickness between the tinesAlternatives
Rod ends M3 to M8ball joint on a threaded shankAlso needed
R-clips for Ø2 to Ø6 pinsretains the pinYou might also need
Questions
What clevis fits a 5 mm thick link?
clevis-3-gap5: 5 mm gap, Ø3 pin hole, 13 × 28 × 12 overall.
What thread is the clevis shank?
M3: a Ø2.5 tap-drill hole 10 deep in a Ø8 boss.