6 means single-row deep groove ball bearings, 4 means double-row deep groove ball bearings;

2ZN means that the outer ring of the bearing has stop groove, Z means that one side of the bearing has dust cover;

2Z indicates that the bearing has dust cap on both sides, and RZ indicates that the bearing has rubber sealing cap on one side;

2RZ indicates that the bearing has rubber sealing cover on both sides; ZRN indicates that the bearing has dust cover on one side and stop groove on the outer ring on the other side;

ZR indicates that the bearing has dust cap on one side, and 2ZR indicates that the bearing has dust cap on both sides;

2ZRN means that the bearing has dust cap on one side and stop groove on the outer ring;

RSR means that the bearing has a seal on one side, 2RSR means that the bearing has a seal on both sides;

C1 indicates that the bearing clearance is in accordance with the standard 1 group, less than 2 groups.

C2 indicates that the bearing clearance meets the standard requirements of 2 groups, less than 0 groups.

C{{0}} indicates that the bearing clearance meets the standard requirements of group 0, omitted from the code, not indicated.

C3 indicates that the bearing clearance meets the standard requirements of 3 groups, more than 0 groups.

C4 indicates that the bearing clearance meets the standard requirements of 4 groups, more than 3 groups.

C5 indicates that the bearing clearance meets the standard requirements of 5 groups, more than 4 groups.

G indicates that the bearing is a low-noise bearing. Mainly refers to deep groove ball bearings with inner diameter d Less than or equal to 60mm.

K1 means that two sets of deep groove ball bearings are mounted in pairs to withstand unidirectional axial loads.

K2 means that two sets of deep groove ball bearings are mounted in pairs to withstand bi-directional axial loads.

K3 means that two sets of deep groove ball bearings are mounted back-to-back without clearance (O-mounting).

K4 means that two sets of deep groove ball bearings are mounted face to face without clearance (X-mounting).

S0 means that the bearing rings have been tempered at high temperatures, and the working temperature can be up to 150 degree .

S1 means that the bearing rings have been tempered at a high temperature, and the working temperature can be up to 200 degree . S2 means that the bearing rings have been tempered at a high temperature.

S2 means that the bearing rings have been tempered at high temperature, and the working temperature can be up to 250 degree . S3 means that the bearing rings have been tempered at high temperature.

S3 means that the bearing rings have been tempered at a high temperature and can reach a working temperature of 300 degree .

S4 means that the bearing rings are subjected to high temperature tempering treatment, and the working temperature can reach 350 degree .

has nearly 40 years of bearing support and industrial service experience. We have a stock warehouse with a wide range of bearings in stock. For specialty and rare bearings, we can distribute to agents in the country of origin of each brand in quantities as low as 1 set.  If you wants to know more bearing,email: alita@sgsabearing.com