It is known to all that NSK bearing tolerances for the boundary dimensions and running accuracy of rolling bearings are specified by ISO 492/199/582 .

As to bearing accuracy classes, besides ISO normal accuracy, there are Class 6X (fo rtapered roller bearings), Class 6, Class 5, Class 4, and Class 2, with Class 2 being the highest in ISO. The applicable NSK bearing tolerances classes and equivalents fo r each bearing type are shown in this section.

Bearing Types                                   Applicable Tolerance Classes    
Deep Groove Ball Bearings                   No rmal Class 6 Class 5 Class 4 Class 2
Angular Contact Ball Bearings               No rmal Class 6 Class 5 Class 4 Class 2
Self-aligning Ball Bearings                    No rmal Class 6 Class 5 – –
                                                     equivalent equivalent  
Cylindrical Roller Bearings                     No rmal Class 6 Class 5 Class 4 Class 2
Slolid Type Needle Roller Bearings        No rmal Class 6 Class 5 Class 4 –
Spherical Roller Bearings                      No rmal Class 6 Class 5 – –
                                                       equivalent equivalent  
Metric-design Tapered Roller Bearings    No rmal – Class 5 Class 4 –
                                                        Class 6X    
Inch-design Tapered Roller Bearings     ABMA ABMA ABMA ABMA ABMA
                                                     CLASS 4 CLASS 2 CLASS 3 CLASS 0 CLASS 00
Thrust Ball Bearings                            No rmal Class 6 Class 5 Class 4 –
Spherical Thrust Roller Bearings            No rmal – – – –

You should choose the right NSK bearing tolerances according to your applications.

Below are some of NSK products most saleable in the international market:

50  72 12 7910C 101 pcs in stock
50  72 12 7010A 21 pcs in stock
50  80 16 7010C34pcs in stock
50  80 16 7210A 22 pcs in stock
50  90 20 7210B 61 pcs in stock
50  90 20 7210C 25 pcs in stock
50  90 20 7310A 34 pcs in stock
50 110 27 7310B 19 pcs in stock
55  80 13 7911C 36 pcs in stock
55  80 13 7011A 21 pcs in stock
55  90 18 7011B 18 pcs in stock
55  90 18 7011C 51 pcs in stock
55 100 21 7211A 55pcs in stock
55 100 21 7211B 14 pcs in stock
55 100 21 7211C 23pcs in stock
55 120 29 7311A 34pcs in stock
55 120 29 7311B 84pcs in stock
60  85 13 7912C 61pcs in stock
60  95 18 7012A 19 pcs in stock
60  95 18 7012C 24pcs in stock
60 110 22 7212A  9 pcs in stock
60 110 22 7212B  22 pcs in stock
60 110 22 7212C  51 pcs in stock
60 130 31 7312A  31 pcs in stock
60 130 31 7312B  8 pcs in stock

For more informations about NSK bearing tolerances, please contact us by mail or call. We welcome customers all over the world to send inquiry to us and we will give you the best price!

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