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Inside corner gussets for 20, 30, 40 and 10-series extrusion
What size gusset for a 2020 extrusion inside corner? · Hardware · basis: Inside corner gusset: legs the profile size × 0.8 profile tall, triangular web, one ISO 273 clearance hole per leg
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 gusset has two legs as long as the profile is wide and 0.8 × that tall, joined by a triangular web at mid-height.
- Legs are 3 mm thick on 20-series and 4 mm on 30, 40 and 10-series: 20 × 16 × 3, 30 × 24 × 4, 40 × 32 × 4, 25.4 × 20.32 × 4 mm.
- Each leg has one hole 0.6 × profile from the corner and 0.4 × profile up: Ø5.5 (M5), Ø6.6 (M6), Ø9 (M8), Ø7.14 (1/4-20).
Sizes
| series | leg_mm | thickness_mm | hole_mm | screw |
|---|---|---|---|---|
| 20 | 20 × 16 | 3 | 5.5 | M5 |
| 30 | 30 × 24 | 4 | 6.6 | M6 |
| 40 | 40 × 32 | 4 | 9 | M8 |
| 10 (1 in) | 25.4 × 20.32 | 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
| gusset-20 | 20-series inside corner gusset, 2 × Ø5.5 (M5 clearance) | STEP · STL |
| gusset-30 | 30-series inside corner gusset, 2 × Ø6.6 (M6 clearance) | STEP · STL |
| gusset-40 | 40-series inside corner gusset, 2 × Ø9 (M8 clearance) | STEP · STL |
| gusset-10in | 10in-series inside corner gusset, 2 × Ø7.14 (1/4-20 clearance) | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=t-slot-gussets

How it fits
Goes in or on
Alternatives
Also needed
You might also need
Questions
What screw for a 2020 gusset?
M5 through each Ø5.5 hole into a T-nut.
What is the difference between a gusset and a corner bracket?
The gusset sits in the inside corner with a triangular web; the corner bracket is an L with side gussets.

