Lead screw Tr10×2, 80 mm thread, Ø6 journals, Ø20 head with Ø6 cross hole — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/lead-screw-tr10x2-l80-journals-6/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design following Brown's figure (1868); true size, no printing allowance
Catalog version: 2026-10-20

Overall (mm): length 20.0, width 20.0, height 118.0
- Trapezoidal Tr10×2 (ISO 2904 basic profile, 30°, single start, right hand) screw, 80 mm of thread between two Ø6 × 14 journals, with a Ø20 × 10 head cross-drilled Ø6 for a tommy bar: 2 mm of travel per turn.
- Minor Ø (basic) 8 mm; drawn with no allowance, so the nut-slide of the same page meshes line on line.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
thread  Tr10×2, right hand
thread length  80 mm
journals  2 × Ø6 × 14
head  Ø20 × 10, Ø6 cross hole
travel per turn  2 mm

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Henry T. Brown (1868, public domain): Five Hundred and Seven Mechanical Movements — scan on archive.org — web — Publisher's page; dimensions are facts — https://archive.org/details/fivehundredseven00browiala
- 507movements.com: Brown's movement No. 103: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_103.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/lead-screw-and-slide-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/lead-screw-tr10x2-l80-journals-6/index.json
API: https://xemstudio.com/api/geometry?object=lead-screw-tr10x2-l80-journals-6