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KOYO Bearings Prefixes Suffixes Meaning

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KOYO Bearings Prefixes Suffixes shown for KOYO Bearings Prefixes Suffixes buyers

 

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: supersales@jntopbearing.com

Useful next decisions after KOYO Bearings Prefixes Suffixes Meaning

KOYO Bearings Prefixes Suffixes Meaning often answers one question and opens two more around selection, fit, and supplier choice. These next destinations keep that follow-up review practical by putting the most relevant commercial and technical options beside the topic already in view.

Ball Bearing Manufacturer Use this commercial destination when sourcing fit, lead time, and repeat-order confidence matter. Products Review the wider global commercial range before narrowing the shortlist. Contact Us This keeps the buying conversation moving once the most suitable options are already visible. About Us This helps when confidence depends on process discipline, testing, or supplier credibility. Quality Control Review this when inspection standards, manufacturing proof, or company background matter to the decision.

Questions that help before the next bearing decision after KOYO Bearings Prefixes Suffixes Meaning

Which next options usually help after reviewing KOYO Bearings Prefixes Suffixes Meaning?

Most buyers benefit from one broader family destination, one more commercial route, and one supporting guide that answers the next practical question. That combination usually turns research into a clearer shortlist.

Why add related bearing destinations beside KOYO Bearings Prefixes Suffixes Meaning?

Because the first answer often leads to a second question about fit, applications, supplier choice, or repeat-order confidence. Keeping those next destinations close reduces unnecessary backtracking.

When is it worth moving from reading into a quote or product review?

That move usually makes sense once the topic has narrowed the likely bearing family and the remaining unknowns are commercial, dimensional, or application-specific rather than purely educational.

What usually makes the next bearing decision easier after KOYO Bearings Prefixes Suffixes Meaning?

The process is often easier when the wider family view, the more commercial destination, and one practical guide stay visible together. That keeps the decision grounded in both application detail and buying reality.

Buyer FAQ

Questions buyers ask before choosing the next bearing option

What is the main takeaway from KOYO Bearings Prefixes Suffixes Meaning?

The main takeaway is that koyo bearings prefixes suffixes meaning should be checked against the bearing family, dimensions, load direction, speed, and operating conditions instead of relying on the title or size alone.

When should I use this guide before requesting a quote?

Use the guide when you are comparing bearing models, checking suffix meanings, confirming seal or clearance choices, planning maintenance, or preparing details for replacement, production, or OEM sourcing.

How does this topic connect to bearing supply?

The topic supports the Bearing Supply decision path by helping buyers understand fit, performance, specification details, or maintenance factors before choosing a product page or contacting the team.

Can this guide replace a final specification check?

No. The guide helps prepare the decision, but a final check should still confirm the part number, dimensions, load, speed, seal, clearance, precision, application, and order quantity.

What should I send if I need help after reading this guide?

Send the bearing number, measured size, photos if available, application, quantity, and any special operating conditions. That gives the team enough context to recommend the right product family or quote route.

Need help checking fit, price, or lead time? Request a bearing quote

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