The dimension of standard R4's is 6.35 15.875 4.987mm,Hongtai have four types dimension to choose,such as R4-2RS/B7.14,R4-2RS/B9.04,R4-2RS/B11.4,R4-2RS/B12.5.All of them are customized and mainly used for Home Appliance,Medical Equipment etc. The extended inner ring reduces the cost,and makes more widely used.High quality bearing steel makes the lifespan longer,multitudinous dimensions of inner rings available.
