A grinding system suitable for grinding the side faces of the inner rings and the outer rings of bearings having the same width, the grinding system comprising, - two conveyors, comprising a top conveyor and a bottom conveyor, wherein the top conveyor is placed higher than the bottom conveyor in the vertical direction, wherein the conveyors are configured to deliver rings thereon and are configured such that the inner rings are at a higher level and the outer rings are at a lower level in the vertical direction, - a race inserter configured to push the inner rings located on the top conveyor into the outer rings located on the bottom conveyor, therefore enabling the inner rings into the outer rings, - a carrier disc, downstream of the race inserter, configured to carry the inner rings centered within the outer rings with a radial motion to the space between the grinding stones performing the grinding process, - a centering bushing located on the carrier disc configured to centre the inner and outer rings that have been placed one within the other, - two rotating grinding stones positioned on top of each other, configured to grind the side faces of the inner and outer rings of bearings, wherein the grinding stones are respectively below and above the inner and outer rings such that both side faces of the inner and outer rings of bearings are ground simultaneously, - a race separator located fixedly beneath the carrier disc and downstream of the grinding stones configured to separate the inner from the outer ring exiting out of the grinding system, the race separator having a first orifice at the section after the grinding stones, wherein the diameter of the orifice smaller than the diameter of the outer ring but larger than the diameter of the inner ring such that the inner rings drop into a first basket and the race separator having a second opening after the orifice such that to enable the outer rings to drop into another basket. - two conveyors, comprising a top conveyor and a bottom conveyor, wherein the top conveyor is placed higher than the bottom conveyor in the vertical direction, wherein the conveyors are configured to deliver rings thereon and are configured such that the inner rings are at a higher level and the outer rings are at a lower level in the vertical direction, - a race inserter configured to push the inner rings located on the top conveyor into the outer rings located on the bottom conveyor, therefore enabling the inner rings into the outer rings, - a carrier disc, downstream of the race inserter, configured to carry the inner rings centered within the outer rings with a radial motion to the space between the grinding stones performing the grinding process, - a centering bushing located on the carrier disc configured to centre the inner and outer rings that have been placed one within the other, - two rotating grinding stones positioned on top of each other, configured to grind the side faces of the inner and outer rings of bearings, wherein the grinding stones are respectively below and above the inner and outer rings such that both side faces of the inner and outer rings of bearings are ground simultaneously, - a race separator located fixedly beneath the carrier disc and downstream of the grinding stones configured to separate the inner from the outer ring exiting out of the grinding system, the race separator having a first orifice at the section after the grinding stones, wherein the diameter of the orifice smaller than the diameter of the outer ring but larger than the diameter of the inner ring such that the inner rings drop into a first basket and the race separator having a second opening after the orifice such that to enable the outer rings to drop into another basket.