Deep groove ball bearing Surface :Polished Machined and turned SGS audited More than 20 ... special fastener 1,Name: Deep groove ball bearing;Deep groove bearing;Ball bearing2,For the similar bearing,what can we do ?(1), Ability ... for the material of this kind of bearing: Grade3.6,4.6,4.8,5.6,6.8 ... hardware fastener ,especially the cutting/turning parts. Deep groove ball bearing