Combined needle roller bearing structure and material

Combined needle roller bearing is a centripetal needle bearing and thrust bearing or bearing unit of angular contact ball bearing components combination, the sliding bearing structure is compact Of small size, high rotating accuracy, can be in under high radial load at the same time, absorb a certain amount of axial load.A variety of forms, wide adaptability and product structure, easy to install.
Widely used in machine tools, metallurgical machinery, textile machinery and printing machinery.
A, the structure form
The class has a centripetal needle bearing and thrust full ball, or and thrust ball, or composite cylindrical roller bearing and thrust, or combined with angular contact ball into an organic whole, can withstand a one-way or two-way axial load.Can also be designed according to customer’s special requirements.
Second, the product precision
Dimensional tolerance and geometric accuracy according to JB/T8877.
Needle difference each other in 2 microns in diameter, precision grade (gb GB309) for G2 stage.
No bearing inner ring inscribed circle diameter in line with the F6 tolerance level before assembly.
Bearing radial clearance in accordance with GB/T4604 e. 0 group.
According to GB/T307.1 special precision level.
Three, the material
Needle roller materials for GCr15 bearing steel, hardened HRC60-65.
Inside and outside the ring material is GCr15 bearing steel, hardened HRC61-65.
Cage materials for high quality low carbon steel or reinforced nylon