Play
Some applications apply bearing loads from varying directions and accept only limited play or "slop" as the applied load changes. One source of motion is gaps or "play" in the bearing. For example, a 10 mm shaft in a 12 mm hole has 2 mm play.
Allowable play varies greatly depending on the use. As example, a wheelbarrow wheel supports radial and axial loads. Axial loads may be hundreds of newtons force left or right, and it is typically acceptable for the wheel to wobble by as much as 10 mm under the varying load. In contrast, a lathe may position a cutting tool to ±0.02 mm using a ball lead screw held by rotating bearings. The bearings support axial loads of thousands of newtons in either direction, and must hold the ball lead screw to ±0.002 mm across that range of loads.
Read more about this topic: Bearing (mechanical)
Famous quotes containing the word play:
“If you will play from a copy of a tune that is choppy,
You’ll get all my applause.”
—Irving Berlin (1888–1989)
“My gowns were gorgeous, always low-cut, very décolleté. I wore hardly any makeup, just some lipsticks, that’s all. No lights. Just a baby spot. I wouldn’t have any entrance. They’d play the intro in the dark, and a spot would come on, and there I’d be.”
—Richard Brooks (1912–1992)
“We cannot play innocents abroad in a world that is not innocent.”
—Ronald Reagan (b. 1911)