actual size 18 cm
Sequential Gearbox
€43.20
Power transmission, Spectra series
- Parts
- 130
- Build
- 5 hrs
- Level
- Advanced
actual width 12 cm
Power transmission, Alpha series
Miniature Differential
€34.20
In stock, ships within 2 business days
The differential that lets a car take a bend, in a desk version. The ring gear drives the carrier and its spider gears, which mesh with two side gears: both wheels get the same torque and can turn at different speeds. 64 parts, 2.5 hours to build.
- Parts
- 64
- Build
- 2 hrs 30 min
- Level
- Intermediate
- Footprint
- 12 × 12 × 8 cm
- Weight
- 220 g
- Glue and battery
- None
Intermediate: several articulated parts
Order today: shipped by Thursday 12 November at the latest.
Free delivery in France on orders from €99.
- Missing part replaced free
- Ships within 2 business days
- 14-day returns
- Illustrated manual included
Ages 14 and up. Contains small parts.
Miniature Differential in detail
The story
In a bend, the outer wheel travels further than the inner one: if both sit on a rigid axle, one of them has to skid. The differential solves this. The Frenchman Onésiphore Pecqueur patented it in 1827 for steam carriages, and every car still carries one today.
What you'll see move
Hold one output and turn the input: the other output spins twice as fast. Brake one side slightly: the speed moves to the other. You see the spider gears stay still on their shaft when driving straight, then start turning as soon as the two outputs no longer move at the same pace.
Specifications
- Number of pieces
- 64 pieces
- Assembly time
- 2 hrs 30 min
- Difficulty
- Intermediate
- Dimensions
- 12 × 12 × 8 cm
- Weight
- 220 g
- Material
- PLA with 30% wood fibre
- Hardware
- Micro-screws and ball bearings included
- Glue required
- None
- Battery required
- None
In the box
- 64 wood-fibre composite parts, ready to assemble
- Micro-screws and ball bearings
- Illustrated step-by-step assembly manual
- No glue and no batteries: everything fits together and turns by hand
14+
Ages 14 and up. Contains small parts: not suitable for children under 3, choking hazard.
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- Parts
- 42
- Build
- 1 hr 15 min
- Level
- Beginner
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- Build
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