The force being applied is by a small electric motor and reduction box within the shaft housing. Battery in the box under the device,wire to the electric motor running up through one of the RHS tube's and a foot opperated peddle under the table. The device like it is depicted would never work,as the forces being applied to the wheel are at right angles to the roller's-in both direction's If you line up the two axle bolt's in one roller set,you can see that the line is at right angles to the wheel. This is the same for each roller set.
The wheel also turns to smoothly at a constant speed,and it reached this constant befor he had even finished placing the roller sets in position. We have sen many unworable devices from this guy,and this is just another.
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