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Extrusion end feet for 20, 30, 40 and 10-series
How do I put a foot on the end of 2020 extrusion? · Hardware · basis: Square foot 1.6 × the profile, socket = profile outline (exact) 3 deep, clearance hole for a screw into the centre bore
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 foot is a 6 mm thick square 1.6 × the profile size with R4 corners, a socket the exact profile outline 3 mm deep, a clearance hole for the screw into the profile's centre bore, and a recess the profile's width in diameter, 1.5 mm deep, underneath.
- 20-series: 32 × 32, Ø5.5 for M5. 30-series: 48 × 48, Ø9 for M8. 40-series: 64 × 64, Ø9 for M8. 10-series: 40.64 × 40.64, Ø7.14 for 1/4-20.
- The screw threads into the profile's centre bore (M5 on 20-series, M8 on 30 and 40).
Sizes
| series | foot_mm | socket_mm | hole_mm | screw |
|---|---|---|---|---|
| 20 | 32 | 20 × 20 × 3 | 5.5 | M5 |
| 30 | 48 | 30 × 30 × 3 | 9 | M8 |
| 40 | 64 | 40 × 40 × 3 | 9 | M8 |
| 10 (1 in) | 40.64 | 25.4 × 25.4 × 3 | 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 |
| foot socket | profile outline (20 / 30 / 40 / 25.4) | profile end | socket | foot-* |
| foot screw hole | Ø5.5 / 9.0 / 9.0 / 7.14 | M5 / M8 / M8 / 1/4-20 into the centre bore | designed | foot-* |
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
| foot-20 | 20-series end foot: 20 × 20 socket for the profile end (exact), Ø5.5 clearance for an M5 into the centre bore | STEP · STL |
| foot-30 | 30-series end foot: 30 × 30 socket for the profile end (exact), Ø9 clearance for an M8 into the centre bore | STEP · STL |
| foot-40 | 40-series end foot: 40 × 40 socket for the profile end (exact), Ø9 clearance for an M8 into the centre bore | STEP · STL |
| foot-10in | 10in-series end foot: 25.4 × 25.4 socket for the profile end (exact), Ø7.14 clearance for an 1/4-20 into the centre bore | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=t-slot-feet
How it fits
Goes in or on
Aluminium T-slot extrusionprofile end in the socket (socket fit)Connects to
Button head socket screws, M2–M8screw through the hole into the centre boreAlternatives
End caps for 20, 30, 40 and 10-series extrusiona plain cap where no foot is neededYou might also need
Questions
What screw holds a foot on 2020 extrusion?
An M5 through the Ø5.5 hole into the tapped 4.2 mm centre bore.
How deep is the socket?
3 mm, at the exact profile outline.