The suffix code is placed after the base code. When there are multiple sets of postcodes, they should be arranged from left to right in the order of postcodes listed in the bearing code table. Some post-code names are separated from the base code 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 - reinforced design, the bearing load capacity is improved.
VH - full complement cylindrical roller bearing with self-locking rollers (the diameter of the rollers is different from that of the standard bearings of the same type).
Post code - bearing dimensions and external structure
DA—— Separable double row angular contact ball bearing with double half inner ring. Example: 3306DA.
DZ - cylindrical outer diameter roller bearing. Example: ST017DZ.
K—— Tapered bore bearing, taper 1:12. Example:c
K30- Tapered bore bearing, taper 1:30. Example: 24040 K30.
2LS—— Double row cylindrical roller bearing with double inner ring with dust cover on both sides. Example: NNF5026VC.2LS.V—— Internal structure change, double inner ring, with dust cover on both sides, full complement double row cylindrical roller bearing.
N——The bearing with snap groove on the outer ring. Example: 6207N.
NR - Bearings with snap grooves and snap rings on the outer ring.
N2-—— Four-point contact ball bearing with two snap grooves on the outer ring. Example: QJ315N2.
S—— Bearings with lubricating oil grooves 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—— Dimensions conform to international standards. Example: 32036X
Z••—— technical conditions for special structures. Arranged downwards from Z11 onwards. Example: Z15—— stainless steel bearing (W-N01.3541).
ZZ - Roller bearing with two retaining rings to guide the outer ring.
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