Packaging & Delivery Packaging Details: 1. standard export packing 2. wooden packing 3. carton packing or as required 4. plastic packing. Delivery Detail: 3-10 days after the receipt of advancement Specifications ball bearing 688 rs 1.small series 2.OEM , Sample free 3.Rich stock, flange, SS ,Carbon steel 4.600 620 680 690 MR series Mini deep groove ball bearing 604 606 607635 683 685 686 687 688 689 690 696 698 -2z zz 2rs Material Bearing Chorme steel Cage Steel cage Features Hardness 58-62HRC Precision ABEC1(P0) ABEC3(P6) ABEC5(P5) ABEC7(P4) ABEC9(P2) Clearance C2,C0,C3,C4,C5 Noises Rating Z1,Z2,Z3,Z4 Vibration Rating V1,V2,V3,V4 Seal type OPEN HS Code 84824000 Port Qingdao Cetificate ISO 9001:2008, SASO ,CQC Advantage 1).Excellent and high quality control 2).Prompt delivery 3).Competitive price 4).Small order accepted 5).Customers' drawing or samples accepted 6).OEM service Application Mainly used in motorcycle rear axle wheel hub, heavy machine tools' main shafts, big power reduction gears, axletree axle boxes, roller wheels of transportation devices, and the supporting rollers and working rollers of the rolling mills. process production 1.Assembly 2.Windage test 3.Cleaning 4.Rotary test 5.Greasing and gland 6.Noise inspection 7.Appearance inspection 8.Rust prevention 9.Product packaging