LEONARDO DA VINCI - Disk and roller bearings for horizontal axles - The axle rests on three disks or rollers (one under the axle, the other two on the sides). Leonardo describes this as the best solution for a fully revolving axle

Madrid Ms. I (BNM), fol. 12v

The axle rests on three disks or rollers (one under the axle, the other two on the sides). Leonardo describes this as the best solution for a fully revolving axle.

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