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Lego Technic: 4 Speed Transmission, Free Wheel (Sprag Clutch)

And 10 MOST AMAZING Lego Machines

Twin lever operation 4 speed gear change

This Free Wheel mechanism allows the output to spin faster than the input, and when the direction of the input is reversed, the output becomes disengaged and can rotate in either direction.

Free Wheel mechanisms are typically found in bicycles, engine starters, agricultural equipment, helicopters, and lathes.

 

10 MOST AMAZING Lego Machines

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