Answer / harshit

Both of them are used to convert their revolutionary motion
into linear motion. They emlpoys nut and bolt principle.
When this mechanism is used in CNC machine to move the
workpiece table then the screw is called BALL SCREW. but
when the screw is used with lathe to give feed to the tool
then it is called LEAD SCREW.

Answer / naresh

Both are nut & bolt mechanism.
Where as in ball srew ball will place in between nut and
bolt for fine moment.
Where as in lead screw nut and bolt mechanism will use.

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