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Snap-in slot covers for 20, 30, 40 and 10-series extrusion (100 mm)
How do I cover the slot of 2020 extrusion? · Hardware · basis: Stem = slot opening × lip (exact), snap barb = opening + 1.2 (designed), cap = opening + 2.4 wide
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 cover is 100 mm long: a 1.2 mm thick cap 2.4 mm wider than the opening, a stem the slot opening wide by the lip thick, and a 1 mm snap barb 1.2 mm wider than the opening (0.6 mm each side, designed) that springs behind the lips.
- 20-series: cap 8.4, stem 6 × 1.8, barb 7.2. 30-series: cap 10.4, stem 8 × 2.5, barb 9.2. 40-series: cap 10.4, stem 8 × 3, barb 9.2. 10-series: cap 8.9, stem 6.5 × 2.3, barb 7.7.
- Covers hide wiring in the slot and keep debris out.
Sizes
| series | cap_mm | stem_mm | barb_mm | length_mm |
|---|---|---|---|---|
| 20 | 8.4 | 6 × 1.8 | 7.2 | 100 |
| 30 | 10.4 | 8 × 2.5 | 9.2 | 100 |
| 40 | 10.4 | 8 × 3 | 9.2 | 100 |
| 10 (1 in) | 8.9 | 6.5 × 2.3 | 7.7 | 100 |
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 |
| slot-cover stem | slot opening × lip | slot opening | slide | slot-cover-* |
| slot-cover barb | opening + 1.2 | snaps behind the lips | designed | slot-cover-* |
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
| slot-cover-20-100 | 20-series snap-in slot cover, 100 mm: stem 6 wide (the slot opening, exact) with a snap barb | STEP · STL |
| slot-cover-30-100 | 30-series snap-in slot cover, 100 mm: stem 8 wide (the slot opening, exact) with a snap barb | STEP · STL |
| slot-cover-40-100 | 40-series snap-in slot cover, 100 mm: stem 8 wide (the slot opening, exact) with a snap barb | STEP · STL |
| slot-cover-10in-100 | 10in-series snap-in slot cover, 100 mm: stem 6.5 wide (the slot opening, exact) with a snap barb | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=t-slot-covers
How it fits
Goes in or on
Aluminium T-slot extrusionstem in the slot opening, barb behind the lipsAlso needed
End caps for 20, 30, 40 and 10-series extrusioncloses the profile endsYou might also need
Questions
How wide is a 2020 slot cover?
The stem is 6.0 mm (the opening), the cap 8.4 mm and the barb 7.2 mm.
Can I make it longer?
The file is 100 mm; the section is constant, so it can be extended to any length in CAD.