Current Location: Home> News> Koyo bearing model Koyo bearing prefix and suffix code meaning explanation
Koyo bearing model Koyo bearing prefix and suffix code meaning explanation
Source: this site     Release time:2021-12-25

KOYO Bearing code consists of basic code, front code and rear code
The basic code indicates the bearing series and size, the front code indicates the bearing type and bearing parts, it is located before the basic code, and the rear code indicates the bearing The technical requirements of the structure, cage, sealing and dustproof, tolerance, oil gap, heat treatment, etc., are located after the basic code.
1. Front code
C- Cylindrical roller bearing accessories (or bearing itself), eg: C00210
45C- Paired installation of tapered roller bearings, face-to-face installation, eg: 45C30210
46C - Pair installation of tapered roller bearings, back-to-back installation, eg: 46C30210
4CRI- Four-row cylindrical roller bearing inner ring, eg: 4CRI4560F
4CRO- Four-row cylindrical roller bearing outer ring, eg: 4CRO660AF < br>E- Magneto ball bearing, outer diameter is positive tolerance, eg: E10
EN- Magnetic motor ball bearing, outer diameter is negative tolerance, eg: EN10
IR- Needle roller bearing inner ring (Inch) , Example: IR1212
IRA- Needle Roller Bearing Inner Ring, wider than IR Series (Inch), Example: IRA20
IRM- Needle Roller Bearing Inner Ring, Example: IRM710
M- Large Load Capacity Ball Bearing, example: M6311
OR- Needle roller bearing, only outer ring, example: OR10876
F- Deep groove ball bearing with flange, example: F603
TR- Single row tapered roller with non-standard size Bearing, example: TR060702
W- wide type, deep groove ball bearing, example: W602ZZX

2. Rear code
(1) Internal structure
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
C - Tapered roller bearing, contact angle of 20 degrees, eg: 30303C
D- Tapered roller bearing, contact angle of 28 degrees and 30 minutes, eg: 30305D
G- Self-aligning and tapered rollers for compression axial oil clearance Sub-bearings
J- Tapered roller bearings, in line with ISO grouping, eg: 30206J
N-Tapered roller bearings, special noise requirements, eg: 30208N
R- Self-aligning with increased load capacity, tapered and cylindrical roller bearings, example: 22228R
(2) Sealed and dustproof
OR- ball bearing with O-ring, example: 6201+OR
RK- single-sided, double-lip contact type synthetic Rubber Seal, Example: 6210RK
2RK- Double Side, Double Lip Contact Synthetic Rubber Seal, Example: 6210.2RK
RS- Single Side, Contact Synthetic Rubber Seal, Example: 6210RS
2RS- Double Side , contact type synthetic rubber seal, for example: 6210-2RS
R SA-Single-sided, with metal cover contact type synthetic rubber seal, eg: 88107RSA
2RSA- Double-sided, with metal cover contact type synthetic rubber seal, example: 88107-2RSA
RSB- Single-sided, with add card Contact type synthetic rubber seal with metal cover, eg: 88107RSB
2RSB- double-sided, contact type synthetic rubber seal with gaga metal cover, example: 88107-2RSB
RSC- RS type seal made of silicone rubber, eg : 6210RSC
RSD- Polypropylene rubber RS ​​type seal, for example: 6210RSD
RSE- One-sided, rib-guided contact synthetic rubber seal, example: 6206RSE
2RSE- Double-sided, rib-guided contact Type Synthetic Rubber Seal, Example: 6206-2RSE
RSF- RS Type Viton Rubber Seal, Example: 6210RSF
RU- Single Side, Non-contact Synthetic Rubber Seal, Example: 6205RU
2RU- Double Side , Non-contact synthetic rubber seal, example: 6205-2RU
TR- single-sided, three-lip metal cover synthetic rubber seal, example: 4508B-TR
2TR- double-sided, three-lip metal cover synthetic rubber seal, Example: 4508B-2TR
U- Needle Roller Bearing with Contact Synthetic Rubber Seal on One Side, Example: NA4916U
UU- Needle Roller Bearing with Contact Synthetic Rubber Seal on Both Sides, Example: NA4916UU
Z - Single-sided steel dust cover, eg: 6205.Z
ZZ- Double-sided steel dust cover, eg: 6205ZZ
ZL- One-sided, L-shaped inner diameter steel dust cover, eg: 6207ZL
ZX- One-sided, steel dust cover pressed by snap ring, example: 6205ZX
ZXL- L-shaped inner diameter single-sided steel dust cover pressed by snap ring, example: 6203ZXL
ZZL- Steel dust cover, double-sided, L-shaped inner diameter, example: 6203ZZL
ZZX- Steel dust cover, double-sided, pressed by the stop ring, example: 605ZZX
ZZXL-steel dust cover, double-sided, pressed by the stop ring, L-shaped inner diameter, for example: 6303ZZXL
 
(3) Ferrule Shape
a- Non-standard chamfers larger than standard chamfers, Example: 6205a
B- Tapered roller bearing, outer ring with flange, example: 30210B
BI- Double half inner ring ball bearing, example: 6215BI
BO- Double half outer ring ball bearing, example : 6215BO
D- Tapered roller bearing, double outer ring or double inner ring (Inch), for example: 594/592D
K- Bearing with tapered bore, taper is 1:12, eg: 1210K
K30- Bearing with tapered bore, taper is 1:30, eg: 23026K30
N- Bearing with snap groove in outer ring , Example: 6206N
C- Tapered roller bearing with key hole
NR- Bearing with snap ring on outer ring, example: 6210NR
Y- Non-standard chamfering smaller than standard chamfering size, example :30206Y
S- Tapered roller bearing, non-standard chamfer (oblique chamfer)
SG- Tapered roller bearing with helical groove in inner diameter
T- Tapered hole or tapered outer diameter (Inch) Tapered Roller Bearings
TD- Double Row, Tapered Bore or Tapered Outer Diameter (Inch) Tapered Roller Bearings
W- Double Inner Rings, Tapered Roller Bearings with Slots on the End, Example: 47T694625WH
W- Cylindrical roller bearings with lubricating grooves and holes in the outer ring, for example: NU316W

(4) Material
E- Ring material code, SAE8620, for example: 30305E
F- Ferrule material code, SAE4320 or SAE4322S, for example: 30325E
H- Ferrule material code, SAE9310
M- Ferrule material code, JIS SCM4
N- Ferrule material code, JIS SNCM9
SC- ferrule material code, JIS S15CK
ST- ferrule material code, stainless steel
S5- ferrule material code, JIS S55C, S50C or S45C
Y- ferrule material code, JIS SNCM25
>
(5) Combination
A- Paired double bearing with inner and outer rings and spacer rings, either spacer ring has no lubricating oil hole or groove, for example: 7210DB/10A
B- with Paired duplex bearings with inner and outer spacer rings, only the inner spacer ring has lubricating oil holes or grooves, for example: 7210DB/10B
C- Paired duplex bearings with inner and outer spacer rings, inner and outer spacers The rings have lubricating holes or grooves, for example: 7210DB/10C
DB- Paired double angular contact ball bearings, back-to-back installation, example: 7210DB
DBD- triple angular contact ball bearings, back-to-back and tandem installation Combination, example: 7210DBD
DF- paired double angular contact ball bearings, face-to-face installation, example: 7210DF
DFD- triple angular contact ball bearings, face-to-face tandem installation combination, example: 7210DFD
DT- into For double angular contact ball bearings, tandem installation, for example: 7210DT
DTD- three Angular contact ball bearing, tandem installation, example: 7210DTD
P- Paired double taper angular contact roller bearing, isolated outer ring, example: 46C30210/P10
U1, U2- Paired double angular contact Ball bearing, inner ring protruding, for example: 7212DBU1

(6) Clearance
C1- The radial clearance is less than C2
C2- The radial clearance is less than the standard clearance
CN - Radial standard clearance
C3- Radial clearance greater than standard clearance
C4- Radial clearance greater than C3
C5- Radial clearance greater than C4
CM- Motor bearing, special Radial Clearance (Cylindrical Roller Bearings Not Interchangeable)
CS- Special Radial Clearance
CT- Electric Motor Cylindrical Roller Bearings (Not Interchangeable), Special Radial Clearance
CX- Special Radial clearance
NA- Cylindrical roller bearing (non-interchangeable) Radial clearance

(7) Cage and its material
FC- Carbon steel solid cage
FG - Nylon Die Casting Cage
FM- Ductile Cast Body Cage
FP- Prop Welded Carbon Steel Solid Cage
FR- High Stress Brass Solid Cage
FS- Prop Type Solid Cage Cage
FT- Phenolic Resin Solid Cage
FY- High Stress Brass Solid Cage
GP- Silver Plated Cage
IP- Silver Plated, Additional Indium Plated Cage
LC- Non-riveted carbon steel solid cage
LP- galvanized cage
LR- riveted high stress brass solid cage
MM- nickel copper alloy cage
MS- post type high Stressed Bronze Solid Cage
PA- Solid Cage, Outer Ring Centering, For Ball Bearings, Example: 6205PA
PB- Solid Cage, Inner Ring Centering, For Ball Bearings, Example: 6205PB
PD- Solid Cage, Steel Ball Centering, For Ball Bearings, Example: 6205PD
Q1- Solid Cage, Outer Ring Centering, For Roller Bearings
Q2- Solid Cage, Inner Ring Centering, For Roller Bearings
R- Stamping Cage with Thicker Than Standard Type
RP- Phosphating Cage
RT- Special Treatment Ball Bearing Cage
SM- Silicon Iron Bronze Solid Cage
SN- Tin Plated Cage
TY- High Stress Brass T Type Solid Cage
YP- Copper Alloy Belt Type Stamping Cage
YS- Stainless Steel Stamping Cage
YY- Copper Alloy Nail Type Stamping Cage rackV- Full ball or full complement of rollers, eg: N2217V
VH- Cylindrical roller bearings, the rollers are separated by block spacers, eg: NU309VH

(8) Tolerance class
Omitted- Tolerance class conforms to JIS standard class
P2- Tolerance class conforms to JIS class 2, example: 6205-P2
P4- Tolerance class conforms to JIS class 4, example: 6205-P4 < br>P5- Tolerance class conforms to JIS class 5, for example: 6205-P5
P6- Tolerance class conforms to JIS class 6, e.g.: 6205-P6
P6X- Tolerance class conforms to JIS class 6X
SP- Tolerance class is super precision grade, eg: 6210-SP
UP- Tolerance class is extra precision grade, eg: 30303UP 

Links:
COPYRIGHT © 2022 ROLLS BEARING
Company Address: Chong'an District, Wuxi City, Jiangsu Province, China