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The advantage of internal ball circulation nut is that the outer diameter is smaller than that of external ball circulation nut. Hence it is suitable for the machine with limit space for Ballscrew installation.
It is strictly required that there is at least one end of screw shaft with complete threads. Also the rest area next to this complete thread must be with smaller diameter than the nominal diameter of the screw shaft.
Above are required for easy assembling the ballnut onto the screw shaft.

 

Types of Nut:

FSIC, FDIC, FOIC, RSIC, RDIC.

 

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please use web search, keyword is "PMI GROUP BALLSCREW"

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