are used to identify some characteristics of skf spherical roller bearing, including open design of SKF spherical roller bearing, sealed spherical roller bearing and bearing for vibrating machinery Roller Bearing: C2: the radial clearance is less than that of the normal group C3: the radial clearance is greater than that of the normal group C4: radial clearance greater than C3 C5: radial clearance greater than C4 C08: rotational accuracy according to ISO tolerance class 5 C083 C08+C3 C084：C08+C4
on both sides of the bearing. The outer ring is provided with lubrication groove Skf Spherical Roller Bearing and three lubrication holes and covered by a plastic belt. 2cs2: fluororubber (FPM) contact seal ring with steel framework on both sides of the bearing. The outer circle of the outer ring is provided with lubrication groove and three lubrication holes, and is covered by a plastic belt. 2cs5: hydrogenated nitrile rubber (HNBR) contact seal with steel frame on both sides of the bearing. Others are the same as 2cs2
K: Taper hole, taper: 1:12 K30: conical hole, taper: 1:30 P5: dimensional accuracy and rotational accuracy in accordance with ISO tolerance Skf Spherical Roller Bearing class 5 P6: dimensional accuracy and rotational accuracy in accordance with ISO tolerance class 6 P62：P6+C2 Va405: Bearing for vibrating machinery with case hardened cage Va406: va405 and inner hole with polytetrafluoroethylene (PTFE) coating Ve552 (E): there are three equally publicized threaded holes on one side of the outer ring to connect the lifting device; e indicates that the bearing is equipped with eyebolts
Vg114: case hardened pressed steel cage Vq424: rotation accuracy higher than C08
W: The outer ring Skf Spherical Roller Bearing has no lubrication groove and lubrication hole W20: outer ring with three lubrication holes W26: inner ring with six lubrication holes W33: outer ring with lubrication groove and three lubrication holes W64: bearing filled with solid oil W77: same as W33, but lubrication hole and plug W513：W26+W33 235220: case hardened inner ring with spiral groove in the inner hole.
There are three marking methods specified for rolling bearings, namely: a. Mechanical method B. electro etching Skf Spherical Roller Bearing method C. chemical method Chemical method is only applicable to a small number of test products; Fill in the clearance group code and accuracy grade code; And the relevant supplementary codes and marks of paired multiple bearings.
Generally, the bearing code, manufacturing year code and manufacturer code (or trademark) shall be marked Skf Spherical Roller Bearing on the end face of the ferrule. The three shall be evenly distributed at an interval of 120 °, which can also be called distribution for beauty. However, it can also be marked on the end face of shield, cage, retaining ring, seal or dust-proof device according to the requirements of product drawings. The manufacturing year code shall comply with the provisions of the product design department of the manufacturer.
its mark is allowed to be marked on the outer diameter and packaging; For those Skf Spherical Roller Bearing larger than 0.8mm, they can be marked according to the following rules: 1) For non separable bearings, it is allowed to mark a complete mark on the end face of a ferrule. In order to distinguish the datum plane of another ferrule, it is allowed to mark the process mark on the non datum plane of the ferrule. 2) For release bearings, complete marks must be marked on the end face of each ferrule. However, it is also allowed to mark the bearing code and manufacturer code (or trademark) on the end face of one ring at an interval of 180 °.
the code of these bearings can be marked on the end face of the ring, or the mark can be added by chemical method. Skf Spherical Roller Bearing [example] when bearings 627 and 618 use the same outer ring, mark “627-618” on the end face of the outer ring. [example] when bearings nu2c4, nj204 and rnu204 use the same outer ring, they can be marked with “nu-nj-rnu204” on the end face of the outer ring, and the common part “204” can be marked by mechanical method.