This machine is mailing applied to bore and grind bearing holes ( including copper quill and connecting-rod tile ) on connecting 杛od of gasoline and diesel engine in automobile, tractor and other power source. Custom also can carry out fine boring or grinding process to connecting-rod bearing seat of deformed workpiece, after grinding combining surface, to ensure the parallelism of two center lines. Equipment with various specialized fixture, the machine can be used to complete fine boring and grinding process to piston pin hole, gas pump bearing hole and valve seat hole, ect. Accessory: Boring bar & Boring cutter Align cutter gauge Align center gauge Expandable fixing core axle Grinding wheel & Grinding bar End face grinding machine