Combined needle roller bearing structure form and material

Combined needle roller bearings are bearing unit consists of radial and thrust needle roller bearings angular contact ball bearings or bearing components combined, sliding bearings, compact structure, small size, high precision rotation, can withstand high radial load at the same time bear a certain axis to load. And the product structure and diverse, wide adaptability, easy to install.
Widely used in machine tools, metallurgical machinery, textile machinery and printing machinery.
First, the structure
This kind of bearing radial and thrust needle roller full complement ball or ball thrust, or composite bearings thrust cylindrical roller or angular contact ball combination as a whole, can withstand a one-way or two-way axial load. But also according to the special requirements of the design structure.
Second, the product precision
Dimensional tolerance and geometrical accuracy is based on JB / T8877.
Mutual difference of needle roller diameter is 2μm, precision grade is G2 (GB GB309).
Inscribed circle conforms to tolerance grade F6 inner diameter without inner bearing before assembly.
0 Group predetermined value bearing radial clearance in line with GB / T4604's.
Special precision grade is based on GB / T307.1.
Third, the material
Material for needle roller is GCr15 bearing steel, hardened HRC60-65.
Inside and outside the ring material is GCr15 bearing steel, hardened HRC61-65.
Material for cages is quality low-carbon steel or reinforced nylon.