Changzhou Dinghao Precision Machine Co., Ltd. [China]

This series bearing roller model number for:BY,DC1,DC2,HY,HY-2,JZ,ZM,BK,DH1,DH4,HY-3,HY-4,HY-5,etc..

 These  same  lot  of  bearing roller tolerance  is  less  than  from  0  to  0.015, and  it   made  by   steel  GCr15  material, heated hardness  HRC61~64°.

bearing roller