Rod fed between two skewed rollers (screw-like feed) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/skew-roller-feed-mechanism/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design following Brown No. 365 (1868)
Catalog version: 2026-10-20

Sizes: see table below
- A round rod is gripped between two rollers whose axes are set at ±15° to the perpendicular instead of parallel. Each roller's rim speed splits into a component along the rod (feed) and one across it (rotation), so the rod both advances and turns, like a screw with no thread.
- Per roller turn: advance π·D·sin α = 24.39 mm and rotation D·cos α / d = 2.9 turns of the Ø10 rod (Ø30 rollers). Drawn with the rollers touching the rod (point contact) on Ø5 axles; the skew angle sets the pitch.
- Brown's No. 365 (rollers with oblique axes); the principle of roller screws, wire straighteners and bar feeders.
- Parts (each has its own page): feed-roller-d30x20-b5, linear-shafts-h6, dowel-pins-metric.
- Brown's movement No. 365 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

parameter  value
rod  Ø10 × 100 (linear shaft)
rollers  2 × Ø30 × 20
skew angle  ±15°
feed per roller turn  24.39 mm
rod turns per roller turn  2.9

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. 365: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_365.html

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/skew-roller-feed-mechanism/index.json
API: https://xemstudio.com/api/geometry?object=skew-roller-feed-mechanism