What Are Our Concerns About Bearings（38）

Q1:What is the meaning of SL185018 bearing model?  Do you have this kind of bearing made in China? 

A:SL series fully loaded cylindrical roller bearings, produced by many domestic manufacturers  

SL series of bearings can be divided into 12 categories, the 12 categories of SL series of INA bearings are described as follows:  

SL0148  

INA Cylindrical roller bearing SL0148, fixed bearing, double row, full roller configuration, size series 48  

SL0149  

INA Cylindrical roller bearings SL0149, fixed bearings, double row, full roller configuration, size series 49  

SL0248  

INA Cylindrical roller bearing SL0248, swimming bearing, double row, full loaded roller configuration, size series 48  

SL0249  

INA Cylindrical roller bearing SL0249, swimming bearing, double row, full roller configuration, size series 49  

SL04..  -PP  

INA cylindrical roller bearing SL04..  -PP, fixed bearing, double row, full roller configuration, light series, with annular groove, lip seals on both sides  

SL0450..  -PP  

INA cylindrical roller bearing SL0450..  -PP, fixed bearing, double row, full roller configuration with annular groove, size series 50, lip seals on both sides  

SL1818  

INA Cylindrical roller bearings SL1818, semi-fixed, full roller configuration, size series 18  

SL1822  

INA Cylindrical roller bearings SL1822, semi-fixed, full roller configuration, size series 22  

SL1829  

INA Cylindrical roller bearings SL1829, semi-fixed, full roller configuration, size series 29  

SL1830  

INA Cylindrical roller bearings SL1830, semi-fixed, full roller configuration, size series 30  

SL1850  

INA Cylindrical roller bearings SL1850, semi-fixed, double row, full roller configuration, Size series 50  

SL1923  

INA cylindrical roller bearing SL1923, semi-fixed, full loaded roller configuration, self-holding roller self-setting, size series 23  

Q2:What are the meanings of rolling bearings 6205 and 32308?

A：Deep groove ball bearing 6205  

6 means deep groove ball bearing  

2 Width series code  

05 Inner diameter size code, indicating that the inner diameter is 05*5=25mm  

Tapered roller bearing 32308  

3 represents tapered roller bearing  

2 Width series code  

3 outer diameter series code  

08 inner diameter size code, indicating that the inner diameter is 08*5=40mm  

Q3:What does it mean that 75 in 7518E is 18?  What is the meaning of the new code number 32218?  

A:7518 is the old model, the new model is 32218, but the last two still represent the inner diameter, indicating that the inner diameter is 18*5=90mm  

The new model 32218：  

3 represents tapered roller bearing, 2 width size series code, 2 outer diameter size series code, 18 inner diameter size code, indicating that the inner diameter is 18*5=90mm  

Q4：What is the meaning of K of self-aligning roller bearing model 22319K?

A:Stands for conical hole.  The suffix “K” is directly added after the basic number describing the bearing.  (for example, 22222KCJ).For 22,23,30,31,32,33  

And 39 series, the taper is 1:12 (diameter to width).  For the 40,41 and 42 series, the taper is 1:30 (diameter to width) 

Q5:German IBC bearing, what is meant 6204 model 1411B?

A:FAG bearing rear code (suffix) and its meaning  

F- Steel solid cage, rolling body.  

Fa-steel solid cage, outer ring.  

FAS- steel solid cage, outer ring, with lubrication groove.  

FB- Steel solid cage, inner ring.  

FBS- Steel solid cage, inner ring, with lubrication groove.  

FH- Steel solid cage, carburized and hardened.  

H,H1- Carburizing and quenching retainer.  

P5- Tolerance class in accordance with the international standard ISO level 5.  

P4- Tolerance class in accordance with the international standard ISO level 4.  

P2- Tolerance classes ISO Grade 2 (excluding tapered roller bearings)  

NSK bearing pre-code meaning  

F — Deep groove ball bearings with flange outer ring (for d less than 10 mm), example :F605.  

HR — Tapered roller bearing with high load, example: HR30207J.  

Meaning of NSK bearing postposition code  

A — Bearing with internal design different from standard.  

A — Angular contact ball bearing, contact Angle is 30 degrees.  

A5 — Angular contact ball bearing, contact Angle 25 degrees  

Z, ZS — One side with steel dust cover.  

ZZ, ZZS — Dust cover with steel plate on both sides.  

D, DU — with contact rubber seal on one side.  

C1 — Radial clearance of centripetal bearing, smaller than C2 clearance.  

C2 — Radial clearance of centripetal bearing, smaller than the standard clearance.  

CN (omitted) — Radial standard clearance for radial bearings.

C3 — Radial clearance of centripetal bearing, larger than standard clearance.  

C4 — Radial clearance of centripetal bearing, larger than C3 clearance.  

NTN bearing suffix meaning  

B — 40° contact Angle;  A — 25° contact Angle;  C — 15° contact Angle;  J — Pressing steel cage;  LI — Machine cutting copper alloy cage;  DB – Back-to-back configuration;  DF — face to face configuration;  CS — Radial clearance is greater than standard clearance.  

TIMKEN bearing suffix meaning  

AB outer ring with flange outer ring, not interchangeable with the basic model  

AC inner ring with different inner diameter and rounded outer diameter, different inner geometry  

Outer ring outside diameter/width/or fillet radius different from base model  

AD outer ring Dual outer rings are not interchangeable with the basic model  

CR Series of bearings with flanges in inner/outer raceway  

CX inner ring size is different from the basic model and is not interchangeable  

D Inner/outer ring Double inner or double outer ring, not interchangeable with the basic model  

INA bearing suffix meaning  

P- bearing side with sealing ring  

PP- bearing with sealing rings on both sides  

Rs-bearing with sealing ring on one side  

2RS- Bearing with sealing rings on both sides  

P6- Bearings with higher dimensional tolerances and geometric accuracy requirements  

P5- Bearings with high dimensional tolerance and geometric accuracy requirements  

P4- Bearings with extremely high dimensional tolerances and geometric accuracy  

KOYO bearing precode meaning  

4CRI- four row cylindrical roller bearing inner ring, example: 4CRI4560F  

4CRO- outer ring of four row cylindrical roller bearing, example: 4CRO660AF  

E-magneto ball bearing with positive tolerance outside diameter, example: E10  

EN- magneto ball bearing with negative tolerance outside diameter, example: EN10  

KOYO bearing suffix meaning  

A-angular contact bearing, contact Angle 30 degrees (not marked), example: 7210  

B- Angular contact bearing, contact Angle 40 degrees, example: 7210B  

C- angular contact bearing, contact Angle 15 degrees, example: 7210C  

Rsc-silicone rubber RS seal, example: 6210RSC  

RS type seal made of rsd-polypropylene rubber, example: 6210RSD  

RSE- single side, flange contact type synthetic rubber seal, example: 6206RSE  

K- bearing with taper hole, taper of 1:12, example: 1210K  

K30- bearing with taper hole, taper of 1:30, example: 23026K30  

N-ring bearing with stop groove, example: 6206N  

C- Tapered roller bearings with lock holes  

NR- bearing with stop ring on outer ring, example: 6210NR  

Y- Non-standard chamfering less than the standard chamfering size, for example, 30206Y  

S-tapered roller bearings, Non-standard Chamfering (Bevel Chamfering)  

SG- Tapered roller bearings with spiral grooves in inner diameter