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How to distinguish different types in Rodamientos koyo bearings’ codes?

374 Published by admin May 15,2018

The meaning of Rodamientos koyo bearing code

The bearing code of Rodamientos koyo company consists of basic code, pre-code and post code. The basic code indicates the bearing series and dimensions, the predecessor code indicates the bearing type and the bearing part, is located before the basic code, and the post code indicates the bearing structure, cage, seal and dust, tolerance, oil gap, heat treatment and other technical requirements. After the basic code.

Rodamientos koyo

Pre-code of Rodamientos koyo

C-Cylindrical roller bearing attachment (or bearing itself), eg: C00210

45C- Paired Mounted Tapered Roller Bearings, Face to Face, Example: 45C30210

46C- Paired Mounted Tapered Roller Bearings, Back-to-Back Mounting, Example: 46C30210

4CRI – Four-row cylindrical roller bearing inner ring, eg 4CRI4560F

4CRO – Four-row cylindrical roller bearing outer ring, eg 4CRO660AF

E-magnetic ball bearings, outside diameter is a positive tolerance, for example: E10

EN- Magnetic ball bearings, negative tolerance for outside diameter, eg EN10

IR- needle roller bearing inner ring (inch), example: IR1212

IRA needle roller bearing inner ring, wider than the IR series (in English) Example: IRA20

IRM- needle roller bearing inner ring, example: IRM710

M-Maximum load capacity ball bearing, eg M6311

OR- needle bearing, only outer ring, example: OR10876

F- deep groove ball bearings with flanges, eg: F603

TR-size non-standard single-row tapered roller bearings, eg TR060702

W-wide, deep groove ball bearings, eg W602ZZX

Rodamientos koyo

Postcode of Rodamientos koyo

(1) Internal structure of Rodamientos koyo

A- angular contact bearing, contact angle 30 degrees (not shown), eg 7210

B- angular contact bearing, contact angle 40 degrees, example: 7210B

C-Angular Contact Bearing, Contact Angle 15 Degrees, Example: 7210C

C- tapered roller bearings, contact angle 20 degrees, eg: 30303C

D- tapered roller bearings, contact angle 28 degrees 30 minutes, Example: 30305D

G-aligning and tapered roller bearings for compressing axial oil gap

J- tapered roller bearings, in accordance with ISO groupings, eg: 30206J

N-tapered roller bearings, special noise requirements, eg: 30208N

R- Self-aligning, tapered and cylindrical roller bearings with increased load capacity, eg 22228R

(2) Sealing and Dust of Rodamientos koyo

OR- ball bearings with O-rings, eg: 6201+OR

RK – Single-sided, double lip contact elastomer seal, eg 6210RK

2RK- Double-sided, double lip contact elastomer seal, eg 6210.2RK

RS – Single-sided, contact elastomer seals, eg: 6210RS

2RS – Double Sided, Contact Rubber Seal, Example: 6210-2RS

RSA – single sided, with metal cover contact elastomer seal, eg 88107RSA

2RSA – Double Sided, Metal Cover Contact Synthetic Rubber Seal, Example: 88107-2RSA

RSB – Single-sided, contact elastomer seal with Gacard metal cover, eg 88107RSB

2RSB – Double-sided, contact elastomer seal with Gacard metal cover, eg 88107-2RSB

RSC – RS seals made of silicone rubber, eg 6210RSC

RSD – RS type seal made of polypropylene rubber, eg 6210RSD

RSE – Single-sided, rib-guided contact elastomer seal, eg: 6206RSE

2RSE – Double-sided, rib-guided contact elastomer seal, eg: 6206-2RSE

RSF-RS type fluorinated rubber seal, for example: 6210RSF

RU – Single-sided, non-contact synthetic rubber seal, eg: 6205RU

2RU – double-sided, non-contact synthetic rubber seal, eg: 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- side needle roller bearings with contact synthetic rubber seal, eg: NA4916U

UU-Two-sided contact needle roller bearings with synthetic rubber seal, eg: NA4916UU

Z- single-sided steel dust cover, for example: 6205.Z

ZZ- Double-sided steel dust cover, for example: 6205ZZ

ZL – Single-sided, L-shaped inner diameter steel dust cover, eg: 6207ZL

ZX-Single-sided, dust-proof steel cover pressed by a snap ring, eg: 6205ZX

ZXL- L-shaped inner diameter single-sided steel dust cover pressed by a snap ring, eg: 6203ZXL

ZZL- Steel dust cover, double-sided, L-shaped inner diameter, eg: 6203ZZL

ZZX- steel dust cover, double-sided, pressed by snap ring, eg: 605ZZX

ZZXL- Steel dust cover, double sided, pressed by snap ring, L-shaped internal diameter, eg: 6303ZZXL

(3) Ring shape of Rodamientos koyo

A- Non-standard chamfer larger than standard chamfer, eg: 6205a

B- tapered roller bearings with flanges on the outer ring, eg: 30210B

BI- Double Half Ball Bearing, Example: 6215BI

BO- Double outer ball bearing, example: 6215BO

D- Tapered Roller Bearings, Double Outer Rings or Double Inner Rings (Inch), Example: 594/592D

K-tapered bearings, taper 1:12, Example: 1210K

K30 bearing with tapered bore, taper 1:30 Example: 23026K30

N- outer ring with snap groove bearing, eg: 6206N

C – Tapered Taper Roller Bearings

NR- outer ring bearing with snap ring, example: 6210NR

Y- is less than the standard chamfer size non-standard chamfer, for example: 30206Y

S- tapered roller bearings, non-standard chamfers (oblique chamfers)

SG- Tapered Roller Bearings with Inner Spiral Groove

T-tapered or tapered outer diameter (inch) tapered roller bearings

TD- Double row, taper or tapered outer diameter (inch) tapered roller bearings

W- Double inner ring, grooved tapered roller bearing, Example: 47T694625WH

W-Cylindrical roller bearings with grooves and holes in the outer ring, eg NU316W

Wi-Cylindrical Roller Bearings (1 – Outer ring has lubricating holes; 2 – Inner ring has lubricating holes and grooves; 3 – Inner rings are lubricated

Oil hole; 4 – inner and outer ring with lubrication holes; 5 – inner and outer rings with lubricating holes and grooves; 6 – outer ring with lubricating holes and grooves, inner ring with lubricating holes; 10 – outer band Keyhole; 11 – outer ring with lubricating holes and lock holes; 13 – outer ring with holes, inner ring with lubricating holes; 14 – inner ring with lubricating holes, outer ring with lubricating holes and lock holes; =1,2,…).

Wj-Spherical Roller Bearings (20-outer ring has three lubrication holes (divided); 20A-outer ring has four lubrication holes (divided); 20C-outer ring has six lubrication holes (divided ); 20T-outer ring has eight lubricant holes (divided); 2N-outer ring has three lubricant holes (divided) and one keyhole; 2 NA-outer ring has four lubricant holes (divided) and One keyhole; 2 NB-outer ring with five lubricant holes and one keyhole (divided); 2NC-outer ring with six lubricant holes (divided) and one keyhole; 2ND-outer ring has seven lubrications Oil hole and one lock hole (eight holes equally divided); 22-Outer diameter tolerance is non-standard (±0.005mm); 26- Inner ring has lubrication hole; 33- Outer ring has three lubrication holes (divided) and lubrication Oil reservoir; 33A-outer ring with four lubricant holes (divided) and lube groove; 33C-outer ring with six lubricant holes (divided) and lube groove; 33T-outer ring with eight lubricants

Hole (divided) and lube groove; 3N-outer ring with three lube holes (divided) and lube groove, one keyhole; 3NA-outer ring with four lube holes (divided) and lube groove, one lock Hole; 3 NB-outer ring has five lubricant holes and one key hole (six-hole equidistant) and lubricating oil groove; 3NC-outer ring has six lubricant holes (divided), lubricant groove and one keyhole; 3ND- The outer ring has seven lubricant holes, one key hole (eight holes equally divided) and lubrication groove; 502- has the characteristics of W22 and W33; 513- has the characteristics of W26 and W33; 518-the inner and outer rings have the lubrication oil Holes and grooves; j = 20, 20A…).

(4) Material of Rodamientos koyo

E-ring material code, SAE8620, Example: 30305E

F-ring material code, SAE4320 or SAE4322S, Example: 30325E

H-ring material code, SAE9310

M-ring material code, JIS SCM4

N-ring material code, JIS SNCM9

SC-ring material code, JIS S15CK

ST-ring material code, stainless steel

S5-ring material code, JIS S55C, S50C or S45C

Y-ring material code, JIS SNCM25

(5) Combination of Rodamientos koyo

A- paired double bearings with inner ring and outer ring, no lubricating holes or slots in any of the spacers, eg 7210DB/10A

B- Paired double bearings with inner and outer spacers, only internal spacers with lubrication holes or grooves, eg 7210DB/10B

C- Paired double bearings with inner and outer spacers, inner and outer spacers all have lubrication holes or grooves, eg 7210DB/10C

DB- Double angular contact ball bearings in pairs, back to back, eg 7210DB

DBD-triple contact ball bearings, back-to-back and series mounting combinations, eg: 7210DBD

DF- Paired double angular contact ball bearings, face to face, eg 7210DF

DFD-triple contact ball bearings, face-to-face series installation combination, eg: 7210DFD

DT- Twin paired angular contact ball bearings, mounted in series, eg 7210DT

DTD-triple contact ball bearings, mounted in series, eg: 7210DTD

P- Paired Double Tapered Angular Contact Roller Bearing, Isolated Outer Race, Example: 46C30210/P10

U1, U2- Twin paired angular contact ball bearings with inner ring extended, eg 7212DBU1

(6) Clearance of Rodamientos koyo

C1- Radial clearance less than C2

C2- radial clearance is smaller than standard clearance

CN- Radial Standard Clearance

C3- Radial clearance larger than standard clearance

C4- Radial clearance greater than C3

C5- Radial clearance greater than C4

CM-motor bearings, special radial clearance (cylindrical roller bearings are not interchangeable)

CS- special radial clearance

CT-motor cylindrical roller bearings (not interchangeable), special radial clearance

CX- special radial clearance

NA-Cylindrical Roller Bearings (Non-Interchangeable) Radial Clearance

(7) Cage and its materials of Rodamientos koyo

FC- Carbon Steel Solid Holder

FG-Nylon die-casting cage

FM-ball cast solid cage

FP- Pillar Welded Carbon Steel Solid Cage

FR – High-stress brass solid cage

FS-pillar solid cage

FT-Phenolic Resin Solid Holder

FY- High-stress brass solid cage

GP- Silver Plated Cage

IP- silver plated, rhodium-plated holder

LC – Non-Riveted Carbon Steel Solid Cage

LP- galvanized cage

LR- riveted high-stress brass solid cage

MM-nickel copper alloy cage

MS- pillar type high-stress bronze solid cage

PA-entity hold

Frame, centering for outer ring, for ball bearings, eg: 6205PA

PB-solid cage, inner ring centering, for ball bearings, eg: 6205PB

PD-solid cage, ball centering, ball bearings, eg: 6205PD

Q1- Solid cage, outer ring centering, for roller bearings

Q2- Solid cage, inner ring centering, for roller bearings

R- Stamping cages with a thickness greater than the standard type

RP- Phosphate Treatment Holder

RT- special treatment ball bearing cage

SM-Silicone bronze solid cage

SN- Tinned Cage

TY- High Stress Brass T Type Entity Cage

YP- copper alloy strip type stamped cage

YS- stainless steel stamped cage

YY- Copper alloy nail type stamping cage

V- full or full roller, eg N2217V

VH-cylindrical roller bearings, roller separated by block spacers, eg NU309VH

(8) Tolerance level of Rodamientos koyo

Omission – Tolerance level conforms to the JIS standard level

P2- Tolerance Class 2 compliant with JIS, eg: 6205-P2

P4- Tolerance Class 4 in accordance with JIS regulations, eg: 6205-P4

P5- Tolerance Class 5 in accordance with JIS regulations, eg: 6205-P5

P6- Tolerance class 6 in accordance with JIS regulations, eg: 6205-P6

P6X- Tolerance Classes Compliance with JIS 6X

SP-tolerance class is super precision, for example: 6210-SP

UP-tolerance class is very precise, eg 30303UP

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