An early example of ball bearing was found on an ancient Roman ship built in 40 BC in lake naimi, Italy: a wooden ball bearing was used to support a rotating table top. Leonardo Da Vinci is said to have described a ball bearing around 1500. Among the various immaturity factors of ball bearings, one of the most important is that the balls will collide with each other, causing additional friction. But you can prevent this by putting the ball in a small cage. Galileo's earliest description of "cage ball" ball bearings was made in the 17th century. At the end of the 17th century, British c. varlow designed and manufactured ball bearings, which were put on the mail truck for trial and British p. worth obtained the patent of ball bearings. The first practical rolling bearing with a cage was invented by clockmaker John harrison in 1760 to make the H3 chronograph.
This paper is organized by guangzhou disolick bearing trading co., LTD