Hand crank, pinion and toothed sector pressing through a connecting rod — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/sector-gear-press-mechanism/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Xem Studio design following Brown No. 133 (1868)
Catalog version: 2026-10-20

Sizes: see table below
- A hand lever turns a 20-tooth pinion meshing with a 60-tooth sector (3 : 1); an arm on the sector drives the platen down through a connecting rod and a guided block. Force at the platen ≈ 3 × (lever / arm) × hand force = 3 × 60/60 × F, rising as the rod comes into line with the guide.
- Drawn with the sector turned 12°: the arm end at (12.47, -58.69), the platen block at y = -117.38 in a 6.2 mm slot (contact), the 60 mm catalog link as the rod.
- Brown's No. 133 (press: crank, pinion, toothed sector and connecting rod to the platen).
- Parts (each has its own page): sector-gear-m1-60t-90deg-arm-60-b5, spur-gears-module-1, hand-lever-60-bore6, four-bar-links, slide-block-12x6, slot-guide-plate-90, dowel-pins-metric.
- Brown's movement No. 133 (1868) shows it; this model is a Xem Studio design following his figure, every part at true size.

parameter  value
pinion / sector  20 T / 60 T, module 1
centre distance  40 mm
sector arm  60 mm
rod  60 mm
lever  60 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. 133: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_133.html

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