THK BIF is the right and left screws are provided with a phase in the middle of the ball screw nut, and an axial clearance is set at a below-zero value (under a preload). This compact model is capable of a smooth motion.
The dustproof of BNF
The following types of nuts are fitted with labyrinth seals.
1. All models BNF and BIF.
2, type MDK0802/1002/1202/1402/1404/1405
When dust or other foreign matter may enter the ball screw, the screw shaft must be completely covered with dust-proof equipment.