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Hobby brass tube (K&S), 1/16–21/32 in and 1–12 mm, telescoping
What sizes of K&S brass tube telescope into each other? · Hardware · basis: K&S Precision Metals round brass tube: imperial sizes in 1/32 in OD steps with .014 in (0.36 mm) wall; metric 1–12 mm OD with 0.45 mm wall
Long Earth Society build part. Displacer rods, push-rods and regenerator tubes on the LES engines. The engines · all LES parts
- sizes
- 32 in table
Notes
- Imperial series telescopes: each size slides inside the next 1/32 in larger (OD 1/8 → ID of 5/32 is 0.128 in). Metric series telescopes in 1 mm steps (0.45 wall leaves 0.1 mm clearance).
- Also sold in aluminium (.014 wall, softer) and stainless (.010–.014). Cut with a tube cutter, deburr inside or the telescope jams.
- Why it's here: displacer rods and push-rods (3/32 and 1/8 in), displacer bodies (telescoping 1/2 → 17/32 for a close-fit sleeve), regenerator tubes, and thermocouple sheaths on the LES engines.
Sizes
| size | od_mm | wall_mm | id_mm |
|---|---|---|---|
| 2/32 in | 1.59 | 0.36 | 0.88 |
| 3/32 in | 2.38 | 0.36 | 1.67 |
| 4/32 in | 3.17 | 0.36 | 2.46 |
| 5/32 in | 3.97 | 0.36 | 3.26 |
| 6/32 in | 4.76 | 0.36 | 4.05 |
| 7/32 in | 5.56 | 0.36 | 4.85 |
| 8/32 in | 6.35 | 0.36 | 5.64 |
| 9/32 in | 7.14 | 0.36 | 6.43 |
| 10/32 in | 7.94 | 0.36 | 7.23 |
| 11/32 in | 8.73 | 0.36 | 8.02 |
| 12/32 in | 9.52 | 0.36 | 8.81 |
| 13/32 in | 10.32 | 0.36 | 9.61 |
| 14/32 in | 11.11 | 0.36 | 10.4 |
| 15/32 in | 11.91 | 0.36 | 11.2 |
| 16/32 in | 12.7 | 0.36 | 11.99 |
| 17/32 in | 13.49 | 0.36 | 12.78 |
| 18/32 in | 14.29 | 0.36 | 13.58 |
| 19/32 in | 15.08 | 0.36 | 14.37 |
| 20/32 in | 15.88 | 0.36 | 15.16 |
| 21/32 in | 16.67 | 0.36 | 15.96 |
| 1 mm | 1 | 0.45 | 0.1 |
| 2 mm | 2 | 0.45 | 1.1 |
| 3 mm | 3 | 0.45 | 2.1 |
| 4 mm | 4 | 0.45 | 3.1 |
| 5 mm | 5 | 0.45 | 4.1 |
| 6 mm | 6 | 0.45 | 5.1 |
| 7 mm | 7 | 0.45 | 6.1 |
| 8 mm | 8 | 0.45 | 7.1 |
| 9 mm | 9 | 0.45 | 8.1 |
| 10 mm | 10 | 0.45 | 9.1 |
| 11 mm | 11 | 0.45 | 10.1 |
| 12 mm | 12 | 0.45 | 11.1 |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| K&S Precision Metals | Round brass tube (sizes and wall) | web | K&S site terms verify |
| Wikipedia | Brass | web | CC BY-SA 4.0 (text) |
| Long Earth Society | Engine builds that use these parts (videos and write-ups) | web, video | LES site |
Free files
★ Free files 32 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| brass-2-32in | K&S round brass tube 2/32 in OD (1.59 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-3-32in | K&S round brass tube 3/32 in OD (2.38 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-4-32in | K&S round brass tube 4/32 in OD (3.17 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-5-32in | K&S round brass tube 5/32 in OD (3.97 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-6-32in | K&S round brass tube 6/32 in OD (4.76 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-7-32in | K&S round brass tube 7/32 in OD (5.56 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-8-32in | K&S round brass tube 8/32 in OD (6.35 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-9-32in | K&S round brass tube 9/32 in OD (7.14 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-10-32in | K&S round brass tube 10/32 in OD (7.94 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-11-32in | K&S round brass tube 11/32 in OD (8.73 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-12-32in | K&S round brass tube 12/32 in OD (9.52 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-13-32in | K&S round brass tube 13/32 in OD (10.32 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-14-32in | K&S round brass tube 14/32 in OD (11.11 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-15-32in | K&S round brass tube 15/32 in OD (11.91 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-16-32in | K&S round brass tube 16/32 in OD (12.70 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-17-32in | K&S round brass tube 17/32 in OD (13.49 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-18-32in | K&S round brass tube 18/32 in OD (14.29 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-19-32in | K&S round brass tube 19/32 in OD (15.08 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-20-32in | K&S round brass tube 20/32 in OD (15.88 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-21-32in | K&S round brass tube 21/32 in OD (16.67 mm), .014 in wall, 50 mm stub | STEP · STL |
| brass-1mm | K&S metric brass tube 1 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-2mm | K&S metric brass tube 2 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-3mm | K&S metric brass tube 3 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-4mm | K&S metric brass tube 4 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-5mm | K&S metric brass tube 5 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-6mm | K&S metric brass tube 6 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-7mm | K&S metric brass tube 7 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-8mm | K&S metric brass tube 8 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-9mm | K&S metric brass tube 9 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-10mm | K&S metric brass tube 10 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-11mm | K&S metric brass tube 11 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
| brass-12mm | K&S metric brass tube 12 mm OD, 0.45 mm wall, 50 mm stub | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=brass-tube-ks
Fits with
Questions
Do K&S brass tubes telescope?
Yes: the imperial series steps 1/32 in in OD with a .014 in wall, so each size slides into the next; the metric series steps 1 mm with a 0.45 mm wall.
What is the ID of 1/8 inch K&S brass tube?
0.097 in (2.46 mm): 3.175 OD minus two 0.356 walls. 3/32 in tube (2.38 OD) slides inside it.
Which brass tube fits a 3 mm shaft?
The 4 mm metric tube (3.1 mm ID) as a sleeve bearing; the 1/8 in imperial (2.46 ID) is too small.