Cogline 220
Twelve gear trains on one frame. Build the crank, turn it, and the whole line moves at the ratio you chose — 1:1, 2:1, 3:1 or 4:1.
40 × 26 × 18 cm assembled · free shipping over $199
What is in the box
- 28 laser-cut ply sheets
- 6 shaft lengths × 4
- 24 brass bearings
- Crank handle
- 56-page manual with 4 builds
- Wax stick
Specification
- Pieces — 322 (28 cut sheets, 6 shaft types, brass bearings)
- Material — 8 mm birch ply gears, 4 mm beech frame, brass bearings
- Finish — Water-based matte, waxed gear faces
- Assembled size — 40 × 26 × 18 cm
- Build time — 4–5 hours
- Age — 10+
- Ratios — 1:1, 2:1, 3:1, 4:1 — all four in one kit
Shipping & returns
- Dispatched from Shenzhen within 3 working days.
- Duties prepaid to US, UK, EU, Canada and Australia.
- 30 days to return an opened set; parts replaced free at any time.
- Flat kraft box, 38 × 28 × 6 cm, 1.2–4.6 kg depending on the set.
The build
Gear trains are the cheapest way to make a machine feel intelligent. Cogline 220 gives you four shaft lengths, six gear diameters and a frame with forty mounting holes, so the same box of parts can be a 1:1 drive, a 4:1 reduction, or a line that reverses direction twice on its way to the last wheel.
The gears are cut from 8 mm ply with a 20° pressure angle and finished with wax, which is why they run quietly and why they will still run after a thousand turns. Brass bearings sit in the frame; the shafts are beech, not metal, so nothing scores.
The manual gives four complete builds and then stops, deliberately. The fifth one is the reason people buy this set.
Specification
| Pieces | 322 (28 cut sheets, 6 shaft types, brass bearings) |
| Material | 8 mm birch ply gears, 4 mm beech frame, brass bearings |
| Finish | Water-based matte, waxed gear faces |
| Assembled size | 40 × 26 × 18 cm |
| Build time | 4–5 hours |
| Age | 10+ |
| Ratios | 1:1, 2:1, 3:1, 4:1 — all four in one kit |
- 01Four interchangeable ratios from one parts box
- 02Waxed 20° pressure-angle gears — quiet, and they hold up
- 03Brass bearings in a beech frame; no metal-on-wood wear
- 04Forty-hole frame grid for your own layouts
