We can provide free samples . Please contact Email for any inquiries

(1) identification of centripetal ball bearingsTechnical state of normal centripetal ball bearings, bearings and their should be no flaking and serious grinding crack, and in light of a circular arc grooved;All of the ball should maintain a circular, surface without spots, crack and spalling;Cage is not loose, not broken, did not wear out.When using a handheld inner ring, another hand quickly jog outer ring rotates, require smooth rotation, only hear the ball rolling on rolling slight noise, no vibration.Should be gradually slow down, stop stop without any setback, normal to the ball bearing, the gap between them, the outer ring and rolling body 0.005 0.010 mm, when along the radial shaking inside and outside the circle, should feel no clearance.Used in bearing, can use hand inner circle along the axial shaking a few times, when the outer ring and ball has obvious noise, explain the fit clearance of more than 0.03 mm, should not continue to use again.Identification of diction of tapered roller bearingsBearing after use, should check whether the rolling body and inner ring raceway is peeling, cage is too loose kuang, edge is complete before and after the inner ring, outer ring raceway whether there is a rift.Inner ring and roller assembly into the outer ring, roller should be falling into a groove in the middle, no more than 1.5 mm forward.And one of them is unqualified, which cannot be used.(3) short spherical roller bearings and cylindrical roller bearing identificationThis kind of bearing outer ring is separable.Normal state, the inner and outer ring raceway and roller should be no broken, pitting and deep grinding crack;Cage should be no deformation and roller can be tucked inside;Inner and outer ring raceway and roller fit clearance should not be more than 0.06 mm.(4) thrust ball bearing identificationNormal condition, two race should be no flaking injury and serious wear and tear, ball should be no broken and pitting;Cage should be no deformation, no collision with two raceway gaskets, and putting the ball firmly tucked together.