The suffix code is placed after the basic code. When there are multiple sets of post-codes, they should be arranged from left to right in the order of the post-codes listed in the bearing code table. Some postcodes are separated from the basic codename by a small dot.

Postcode—internal structure

A, B, C, D, E——Internal structural changes

Example: Angular contact ball bearings 7205C, 7205E, 7205B, C-15° contact angle, E-25° contact angle, B-40° contact angle.

Example: cylindrical roller, spherical roller and thrust spherical roller bearings N309E, 21309E, 29412E - enhanced design, improved bearing load capacity.

VH - full roller cylindrical roller bearing with self-locking rollers (the compound circle diameter of the rollers is different from that of standard bearings of the same model).

Example: NJ2312VH.

Post code—bearing dimensions and external structure

DA - separable double row angular contact ball bearing with double half inner ring. Example: 3306DA.

DZ——Roller bearing with cylindrical outer diameter. Example: ST017DZ.

K——Tapered bore bearing, taper 1:12. Example: 2308K.

K30——Tapered bore bearing, taper 1:30. Example: 24040 K30.

2LS——Double row cylindrical roller bearing with double inner ring and dust cover on both sides. Example: NNF5026VC.2LS.V—— Internal structure changes, double inner rings, dust covers on both sides, full roller double row cylindrical roller bearings.

N——Bearings with stop grooves on the outer ring. Example: 6207N.

NR——Bearing with stop groove and stop ring on the outer ring. Example: 6207 NR.

N2-——Four-point contact ball bearing with two stop grooves on the outer ring. Example: QJ315N2.

S——Bearing with lubricating oil groove and three lubricating oil holes in the outer ring. Example: 23040 S. Spherical roller bearings with bearing outer diameter D≥320mm are not marked with S.

X——The overall dimensions comply with international standards. Example: 32036X.

Z••——Technical conditions for special structures. Starting from Z11 and going down. Example: Z15——Stainless steel bearing (W-N01.3541).

ZZ——Roller bearing with two retaining rings guiding the outer ring.