KOYO Bearings Prefixes Suffixes Meaning Introduction:
KOYO bearings prefixes suffixes meaning is different for different code.
Below is the meaning of different prefixes and suffixes for KOYO bearings.
Different Prefixes Meaning:
4CRI: Four-row cylindrical roller bearing inner ring, example: 4CRI4560F
4CRO: Four-row cylindrical roller bearing outer ring, example: 4CRO660AF
E: Magneto ball bearing, the outer diameter is a positive tolerance, for example: E10
EN: Magnetic motor ball bearing, the outer diameter is negative tolerance, for example: EN15
Different Suffixes Meaning:
(1) Internal Structure:
A: Angular contact bearing, contact angle 30 degree (not marked), for example: 7210
B: Angular contact bearing, contact angle 40 degree, example: 7210B
C: Angular contact bearing, contact angle 15 degree, for example: 7207C
C: Tapered roller bearing, contact angle is 20 degrees, for example: 30303C
D: Tapered roller bearing, contact angle is 28 degrees and 30 minutes, for example: 30305D
G: Spherical roller and tapered roller bearings with compressed axial oil gap
J: Tapered roller bearing, conforms to ISO grouping, such as 30206J
N: Tapered roller bearings, special noise requirements, for example: 30208N
R: Spherical roller bearings, tapered roller bearings and cylindrical roller bearings with increased load capacity, such as 22228R
(2) Seal and Dustproof:
RSA: Single-sided, contact synthetic rubber seal with metal cover, for example: 88107RSA
2RSA: Double-sided, contact synthetic rubber seal with metal cover, for example: 88107-2RSA
RSC: Single-sided, silicone rubber RS type seal, such as: 6219RSC
2RSC: Double-sided, silicone rubber RS type seal, for example: 6219-2RSC
RU: Single-sided, non-contact synthetic rubber seal, such as 6205RU
2RU: Double-sided, non-contact synthetic rubber seal, such as 6205-2RU
Z: Single-sided steel dust cover, for example: 6205Z
ZZ: Double-sided steel dust cover, for example: 6205ZZ
RSC: RS type seal made of silicone rubber, for example: 6210RSC
RSD: RS type seal made of polypropylene rubber, for example: 6210RSD
RSE: Single-sided, rib guide contact type synthetic rubber seal, example: 6206RSE
(3) Bearing Rings Shape:
B: Tapered roller bearing with flange on the outer ring, such as 30210B
D: Tapered roller bearing, double outer ring or double inner ring (inch), such as 594/592D
N: Bearing with a snap groove on the outer ring, such as 6206N
NR: Outer ring with a snap ring bearing, for example: 6210NR
Y: Non-standard chamfer smaller than the standard chamfer size, such as 30206Y
T: tapered bore or tapered outer diameter (inch) tapered roller bearings
K: Bearing with tapered bore, the taper is 1:12, for example: 1210K
K30: With a tapered bore bearing, the taper is 1:30, for example: 23026K30
C：Tapered roller bearing with keyhole
S: Tapered roller bearing, non-standard chamfer (oblique chamfer)
SG: Tapered roller bearing with spiral groove inside diameter
W: Double outer ring, tapered roller bearing with groove on the end face, for exmple: 47T694625WH
W: Cylindrical roller bearings with lubricating oil grooves and holes in the outer ring, for example: NU316W
(4) Bearing Material:
E: Bearing ring material code, for example: 30305E
M: Bearing ring material code, for example: JIS SCM4
ST: Bearing ring material code, stainless steel
S5: Bearing ring material code, JIS S55C, S50C or S45C
Y: Bearing ring material code, for example: JIS SNCM25
(5) Combination:
DB: Paired double angular contact ball bearings, mounted back to back, for example, 7210DB
DBD: Triple angular contact ball bearings, a combination of back-to-back and series installation, for example, 7210DBD
DF: Paired double angular contact ball bearings, face-to-face installation, for example, 7212DF
DFD: Triple angular contact ball bearings, face-to-face series installation combination, for example, 7211DFD
DT: Paired double angular contact ball bearings, mounted in series, for example, 7211DT
DTD: Triple angular contact ball bearings, mounted in series, for example, 7208DTD
U1, U2: Paired double angular contact ball bearings, with the inner ring extending, for example, 7214DBU1
If you have any question, pls feel free to contact us !
Professional Bearing Solution Expert
Jinan TOP Bearing Co., Ltd
Add: 1-2405-4, No. 1825, Hualong Rd., Licheng Dist, Jinan, Shandong, China
Mobile/Whatsapp/Wechat: +8615662712802
Email: [email protected]
