Xem Studiomeasured geometryT8 lead screw Tr8×8 envelope, 100 to 400 mm
What are the dimensions of a T8 lead screw? · Hardware · basis: Tr8×8(P2) trapezoidal lead screw, 4-start: Ø8 major, 2 mm pitch, 8 mm lead; envelope only
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
- 6 in table
Notes
- Ø8 envelope, 100, 150, 200, 250, 300 and 400 long; the thread is not drawn.
- Tr8×8(P2): 2 mm pitch, four starts, 8 mm of travel per turn. Tr8×2 (single start, 2 mm per turn) has the same envelope; four thread ends visible on the screw's end face mean 8 mm lead.
- The end goes into a 5 → 8 mm coupler on a NEMA 17 or a bearing of 8 mm bore.
Sizes
| file | Ø | length |
|---|---|---|
| t8-screw-100 | 8 | 100 |
| t8-screw-150 | 8 | 150 |
| t8-screw-200 | 8 | 200 |
| t8-screw-250 | 8 | 250 |
| t8-screw-300 | 8 | 300 |
| t8-screw-400 | 8 | 400 |
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 |
|---|---|---|---|---|
| screw | Ø8 | coupler bore or bearing | slide | t8-screw-* |
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 6 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 |
Plain text: sheet.txt · JSON: /api/geometry?object=t8-lead-screw
Questions
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. Four thread ends on the screw end = 8 mm lead.
What is the T8 pitch?
2 mm between threads; with 4 starts the lead is 8 mm.