Xem Studiomeasured geometryT8 lead screw and brass nut (Tr8×8, 2 mm pitch 4-start)
What are the T8 lead screw nut flange dimensions? · Hardware · basis: Tr8×8(P2) trapezoidal lead screw as sold for 3D printers; nut dimensions from common catalogues
- sizes
- 3 in table
Notes
- Ø8 mm screw, 2 mm pitch, 4 starts → 8 mm lead (one turn = 8 mm). Tr8×2 single-start (2 mm lead) exists and looks identical; check the spec.
- Brass nut: Ø10.2 body, 15 mm long, Ø22 flange 3.5 mm thick, four Ø3.5 holes on a 16 mm circle (M3). Print the pocket for the flange at Ø22.3.
- Couple to a NEMA 17 with a 5 → 8 mm coupler, or buy the screw with an integrated motor.
Sizes
| part | dia_mm | length_mm | detail |
|---|---|---|---|
| screw | 8 | 100–400 | Tr8×8(P2), 4-start |
| nut body | 10.2 | 15 | brass, Tr8×8 |
| nut flange | 22 | 3.5 | 4 × Ø3.5 on 16 PCD |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Wikipedia | Leadscrew | web | CC BY-SA 4.0 (text) |
| McMaster-Carr | Lead screws and nuts (free STEP/IGES/STL per part, for your own design use; no redistribution) | STEP, IGES, STL, PDF | McMaster-Carr site terms: personal design use, no redistribution verify |
Free files
★ Free files 7 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| t8-screw-100 | T8 lead screw envelope Ø8 × 100 (thread not modeled) | STEP · STL |
| t8-screw-150 | T8 lead screw envelope Ø8 × 150 (thread not modeled) | STEP · STL |
| t8-screw-200 | T8 lead screw envelope Ø8 × 200 (thread not modeled) | STEP · STL |
| t8-screw-250 | T8 lead screw envelope Ø8 × 250 (thread not modeled) | STEP · STL |
| t8-screw-300 | T8 lead screw envelope Ø8 × 300 (thread not modeled) | STEP · STL |
| t8-screw-400 | T8 lead screw envelope Ø8 × 400 (thread not modeled) | STEP · STL |
| t8-brass-nut | T8 brass nut: Ø10.2 body, Ø22 flange 3.5 thick, 4 × Ø3.5 on 16 PCD, 15 long | STEP · STL |
Plain text: sheet.txt · JSON: /api/geometry?object=lead-screw-t8
Fits with
Questions
What is the T8 nut hole pattern?
Four Ø3.5 mm holes (M3) on a 16 mm pitch circle, at 45° to the axes; flange Ø22 × 3.5 mm.
Is T8 lead 2 mm or 8 mm?
Both are sold as 'T8'. Tr8×8 (4-start) moves 8 mm per turn; Tr8×2 moves 2 mm. Count the starts on the end of the screw: four visible thread ends = 8 mm lead.