A ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction. A threaded shaft provides a helical raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads, they can do so with minimum internal friction. They are made to close tolerances and are therefore suitable for use in situations in which high precision is necessary. The ball assembly acts as the nut while the threaded shaft is the screw. In contrast to conventional leadscrews, ballscrews tend to be rather bulky, due to the need to have a mechanism to re-circulate the balls.
Read more about Ball Screw: Applications, History, Description and Operation, Disadvantages, Advantages, Manufacture, Ball Return Systems, Equations
Famous quotes containing the words ball and/or screw:
“‘Throw down the ball, ye Jew’s daughter,
Throw down the ball to me!’
‘Never a bit,’ says the Jew’s daughter,
‘Till up to me come ye.’”
—Unknown. Hugh of Lincoln (l. 13–16)
“Prithee don’t screw your wit beyond the compass of good manners.”
—Colley Cibber (1671–1757)