Suffixes
RS  –  seal on one side
2RS  –  seal on both sides
RSN  – seal on one side and snap ring groove on the outer ring on the opposite side than the seal
RSNB  – seal on one side and snap ring groove on the outer ring on the same side as the seal
2RSN  –  seal on both sides and snap ring groove on the outer ring
RSR  – seal on one side, adhering to the smooth inner ring collar
2RSR  –  seals on both sides adhering to the smooth inner ring collar
Z –  shield on one side
2Z  –  shields on both sides
ZN  – shield on one side and snap ring groove on the outer ring on the opposite side than the shield
ZNB – shield on one side and snap ring groove on the outer ring on the same side as the shield
2ZN  –  shields on both sides and snap ring groove on the outer ring
ZR  – shield on one side, adhering to the smooth inner ring flange
2ZR –  shields on both sides, adhering to the smooth inner ring flange
N,NR – ring groove for locking ring
A – contact angle 30°
B – contact angle 40°
C – contact angle 15°
E – contact angle 25°
UA – universal design for installation in pairs. For installation on the O and X shaped scheme have a small axial clearance
UO – universal design for installation in pairs. For O  and X shaped installation – without gaps

Clearance
C2 –  smaller clearance than normal, normal clearance (is not designated)
C3  – bigger clearance than normal
C4 –  bigger clearance than C3
C5 –  bigger clearance than C4

Cage
Material of cages for standard design bearings is usually not specified.
J  – cage pressed from steel plate, guided on rolling elements
J2  – cage pressed from steel plate, guided on rolling elements. New design of single row tapered bearings
Y  – cage pressed from brass sheet, guided on rolling elements
F  –  massive steel cage, guided on rolling elements
L – massive light metal cage, guided on rolling elements
M  –  massive brass or bronze cage, guided on rolling elements
T  – massive textite cage, guided on rolling elements
TN  –  massive cage of polyamide or similar plastic, guided on rolling elements
TNG – massive cage of polyamide or similar plastic, reinforced by glass fibres, guided on rolling elements
MP – massive cage made of brass window-type

Accuracy level
P0  –  normal accuracy level (is not designated)
P6  – higher accuracy level than normal
P5  – higher accuracy level than P6
P5A  – higher accuracy level than P5 in some parameters
P4 –  higher accuracy level than P5
P4A  –  higher accuracy level than P4 in some parameters
P2 – higher accuracy level than P4
P6E  –  higher accuracy level for rotary electrical machines
P6X – higher accuracy level for single row tapered bearings
SP – higher accuracy level for roller bearings with tapered bore
UP – higher accuracy level such as SP for roller bearings with tapered bore