Follower bar 8 × 8 × 60 with a Ø3 cross hole for a roller pin — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/waved-wheel-follower-bar-8x8-roller-pin/  (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 8.0, width 8.0, height 60.0
- 8 × 8 bar standing on the wheel's face, with a Ø3 hole 4 mm above its foot for the pin of a Ø10 roller (a 623 bearing) whose axis is radial to the wheel.
- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).

dimension  value
bar  8 × 8 × 60
roller pin hole  Ø3, 4 mm above the foot

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. 165: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_165.html
- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/waved-wheel-reciprocating-bar-mechanism/

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/waved-wheel-follower-bar-8x8-roller-pin/index.json
API: https://xemstudio.com/api/geometry?object=waved-wheel-follower-bar-8x8-roller-pin