Xem Studiomeasured geometryR-clips (hairpin cotters) for Ø2 to Ø6 pins
What size R-clip fits a given pin diameter? · Hardware · basis: Hairpin R-clip envelopes scaled to the pin Ø: straight leg 6 × pin Ø, loop OD 3.2 × pin Ø, 1.2 wire
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
- 4 in table
Notes
- A hairpin clip: one straight leg goes through the pin's cross-hole and the curved leg wraps over the pin to hold it. All four files have a 1.2 mm wire, drawn flat (1.2 thick).
- Overall length and loop OD: r-clip-2 14.2 × 6.4; r-clip-3 21.3 × 9.6; r-clip-4 28.4 × 12.8; r-clip-5 35.5 × 16.0. The number in the file name is the smallest pin Ø it is drawn for; each covers that Ø and the next millimetre up.
- The 1.2 wire passes cross-holes of Ø1.2 and larger: the Ø5, Ø6 and Ø8 clevis pins (Ø1.2, Ø1.6, Ø2.0 holes).
Sizes
| file | pin Ø | wire Ø | length | loop OD |
|---|---|---|---|---|
| r-clip-3 | 2–3 | 1.2 | 14.2 | 6.4 |
| r-clip-3 | 3–4 | 1.2 | 21.3 | 9.6 |
| r-clip-4 | 4–5 | 1.2 | 28.4 | 12.8 |
| r-clip-5 | 5–6 | 1.2 | 35.5 | 16.0 |
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 |
|---|---|---|---|---|
| R-clip wire | Ø0.8 / 1.0 / 1.2 / 1.6 / 2.0 | split-pin hole of the Ø3 / 4 / 5 / 6 / 8 clevis pin | slide | r-clip-* |
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
| r-clip-3 | R-clip (hairpin) for the Ø3 clevis pins (clevis-pin-3x12, clevis-pin-3x20): wire Ø0.8 = their split-pin hole, straight leg 18 long, bow wraps the Ø3 pin | STEP · STL |
| r-clip-4 | R-clip (hairpin) for the Ø4 clevis pins (clevis-pin-4x20): wire Ø1 = their split-pin hole, straight leg 24 long, bow wraps the Ø4 pin | STEP · STL |
| r-clip-5 | R-clip (hairpin) for the Ø5 clevis pins (clevis-pin-5x20, clevis-pin-5x30): wire Ø1.2 = their split-pin hole, straight leg 30 long, bow wraps the Ø5 pin | STEP · STL |
| r-clip-6 | R-clip (hairpin) for the Ø6 clevis pins (clevis-pin-6x30): wire Ø1.6 = their split-pin hole, straight leg 36 long, bow wraps the Ø6 pin | STEP · STL |
| r-clip-8 | R-clip (hairpin) for the Ø8 clevis pins (clevis-pin-8x40): wire Ø2 = their split-pin hole, straight leg 48 long, bow wraps the Ø8 pin | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=r-clips
How it fits
Goes in or on
Clevis pins ISO 2341 B, Ø3 to Ø81.2 wire through the pin's cross-holeConnects to
Clevises with M3 tapped shankholds the pin across the forkYou might also need
Questions
What size R-clip for a 5 mm pin?
r-clip-4 (Ø4–5 pins) or r-clip-5 (Ø5–6): 28.4 or 35.5 mm long, 1.2 mm wire, which passes the Ø1.2 cross-hole of an ISO 2341 Ø5 clevis pin.
How thick is the R-clip wire?
1.2 mm on all four files.