FDY ball screw pair Product features: it can be installed in both directions and multiple parts.
Additional application: nut rotation and axial movement.
Ball screw nut pairs can be divided into t class and P type according to their application. Class T is the driving ball screw nut pair, and the P class is the positioning ball screw nut pair. The linear motion positioning axis of CNC machine tool should adopt the P type ball screw nut pair.
The accuracy grade of ball screw nut pair is usually divided into seven grades: 1, 2, 3, 4, 5, 7 and 10. The accuracy of grade 1 is high, and the others are reduced in turn. In CNC machine tools, the accuracy of grade 3 and 4 is generally adopted, and the precision CNC machine tools can adopt the accuracy of level 2 or 3.
In engineering design, the ball screw nut pair is generally made of standardized products. According to the requirements of the ball screw, such as the speed, the acceleration and the required service life of the ball screw. Rated dynamic load C. m. When the bottom diameter of small thread of lead screw is D, pre tightening force and pre stretching force are required.