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T-slot tongue gauge 5.6 / 5.8 / 6.0 mm (6 mm slot)
What tongue width slides in a 2020 extrusion slot when 3D printed? · Hardware · basis: Tongues stepped below the 6.0 mm slot opening of 20-series extrusion
Long Earth Society build part. Print these first to measure your allowances; every LES part is drawn at exact size. 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
- 3 in table
Notes
- Every file on this site is drawn at exact size with no printing allowance; this gauge steps through sizes around the nominal so you can measure the allowance your process needs for one fit class, then apply it only to the features each object lists under Mating features.
- The gauge is a 60 × 30 × 3 mm plate with three tongues 20 mm long × 1.5 mm tall, 5.6, 5.8 and 6.0 mm wide, on 20 mm pitch.
- Slide each tongue into the slot of a 6 mm-slot extrusion: the widest one that slides, minus 6.0, is your tongue allowance (negative).
Sizes
| tongue | width_mm | length_mm | height_mm |
|---|---|---|---|
| 1 | 5.6 | 20 | 1.5 |
| 2 | 5.8 | 20 | 1.5 |
| 3 | 6.0 | 20 | 1.5 |
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 |
|---|---|---|---|---|
| gauge sizes | stepped around nominal | the true pin, nut, bearing or extrusion slot being tested | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Engineering tolerance | web | CC BY-SA 4.0 (text) |
| Prusa | Knowledge base: XY size compensation | web | Prusa KB verify |
| Long Earth Society | Engine and rig builds | web, video | LES site |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
Plain text: sheet.txt · JSON: /api/geometry?object=extrusion-tongue-gauge
How it fits
Goes in or on
2020 aluminum extrusiontongues slide in the 6.0 mm slot openingConnects to
Slide-in T-nuts for 20, 30, 40 and 10-series…the measured allowance applies to T-nut tonguesYou might also need
Questions
What width should a tongue be for a 2020 slot?
The slot is 6.0 mm and the tongues are drawn at 6.0; this gauge shows how much narrower your process needs it.
Does it work for 30- or 40-series?
No; it is sized for the 6 mm slot of 20-series extrusion.