Apply to the oil or the more duiffcult parts of the work,wear resistance,low coefficent of fricton,long life;go together good performance,low noise,no pollution,good corrsion resistance;running play in the protecton of the formaton of transfer film shaft,whilr the role of non-bite-axis phenomenon;the shaft,low processing requirements,reduce processing costs for users;while NTB-14 special wear-resiatant lubricating layer design in dry conditions than other bearing has a better resistance to grindability and low coefficient of friction.