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Ball screw

Ball screw

Ball screw

(OP)
    What is the diferents in precision and durability between this système and a nother?

RE: Ball screw

Simeneizer,

Ball screws are very accurate and repeatable, with little or no back lash, depending on the level of precision.  As compared to an Acme screw, a ball screw has very little drive friction and can be back driven if necessary.  This low friction will reduce the size of the motor required to drive the screw.

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