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2 × 3 hole joining plates for 20, 30, 40 and 10-series extrusion
What hole spacing for a 2020 joining plate? · Hardware · basis: Flat plate, 2 × 3 holes on the profile pitch, ISO 273 clearance holes, 5 mm thick
Long Earth Society build part. Brackets and feet on the LES 2020 test stands; motor and bearing mounts hang off these. 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
- Each plate is 5 mm thick with R3 corners and six holes in a 2 × 3 grid on the profile pitch, one hole per profile centreline.
- 20-series: 40 × 60, Ø5.5 holes (M5) on 20 mm pitch. 30-series: 60 × 90, Ø6.6 (M6) on 30. 40-series: 80 × 120, Ø9 (M8) on 40. 10-series: 50.8 × 76.2, Ø7.14 (1/4-20) on 25.4.
- Use it to join profiles in a T or L, or as a mounting grid.
Sizes
| series | plate_mm | pitch_mm | hole_mm | screw |
|---|---|---|---|---|
| 20 | 40 × 60 × 5 | 20 | 5.5 | M5 |
| 30 | 60 × 90 × 5 | 30 | 6.6 | M6 |
| 40 | 80 × 120 × 5 | 40 | 9 | M8 |
| 10 (1 in) | 50.8 × 76.2 × 5 | 25.4 | 7.14 | 1/4-20 |
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 |
|---|---|---|---|---|
| bracket / gusset / plate screw holes | Ø5.5 / 6.6 / 9.0 / 7.14 | M5 / M6 / M8 / 1/4-20 clearance | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | T-slot nut | web | CC BY-SA 4.0 (text) |
| OpenBuilds | Tee nuts and brackets for V-slot | web, STEP | OpenBuilds site verify |
| Long Earth Society | Engine and rig builds on extrusion frames | web, video | LES site |
Free files
★ Free files 4 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| plate-20-2x3 | 20-series 2 × 3 hole plate on 20 mm pitch, 5 thick, Ø5.5 holes (M5 clearance) | STEP · STL |
| plate-30-2x3 | 30-series 2 × 3 hole plate on 30 mm pitch, 5 thick, Ø6.6 holes (M6 clearance) | STEP · STL |
| plate-40-2x3 | 40-series 2 × 3 hole plate on 40 mm pitch, 5 thick, Ø9 holes (M8 clearance) | STEP · STL |
| plate-10in-2x3 | 10in-series 2 × 3 hole plate on 25.4 mm pitch, 5 thick, Ø7.14 holes (1/4-20 clearance) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=t-slot-joining-plates
How it fits
Goes in or on
Aluminium T-slot extrusionholes on the profile pitch over the slot centrelinesAlternatives
Inside corner gussets for 20, 30, 40 and…corner jointAlso needed
Slide-in T-nuts for 20, 30, 40 and 10-series…screw through each hole into a T-nutYou might also need
Questions
What hole spacing on a 2020 plate?
20 mm, the profile pitch, with Ø5.5 holes for M5.
How thick are the plates?
5 mm for every series.