Ring & Ball Material:

1.-: No code, CNS GCr15/SAE52100/SUJ2 or equivalent bearing steel.

2.S: AISI 440C/CNS440/CNS420.

3.SE: Outer/Inner ring: AISI 440C/CNS440/CNS420.
Ball: Ceramic

4.CE: Outer/Inner ring: CNS GCr15/SAE52100/SUJ2 or equivalent bearing steel.
Ball: Ceramic

Series:

·Metric:

1.R-(RF-) R-Series (Flanged)

2.L-(LF-) L-Series (Flanged)

3.A- Ultra Thin Type

4.RNR- R-Series with External Retaining Ring

5.LNR- L-Series with External Retaining Ring

·Inch Radial Ball Bearing:

6.RI- Inch Type

7.RIF- Inch Flanged Type

Basic Code:

The basic code follows the same format as other bearings. It consists of a type of code at the beginning, followed by size (width series), and then the inner diameter series.

Cage Codes:

·-: No symbol, full ball complement.

·C: Crown-type stainless steel.

·M: phenolic.

·MC: one-piece snap-type phenolic.

·R: Ribbon-type stainless steel.

Seal Codes:

·-: No code, open type.

·RS: Non-contact rubber seal.

·RZ: Contact rubber seal.

·T: Stainless shield.

·Z: metallic shield.

Accuracy Level:

·5: ABEC5, ISO class 5.

·7: ABEC7, ISO class 4.

Radial Play:

·P: followed by numbers indicates radial play range in ten-thousandths of an inch.

Example:

·P13: .0001” ~ .0003” (2.5µm ~ 7.5µm)

·P24: .0002” ~ .0004” (5.0µm ~ 10.0µm)

Lubrication:

·LD: No lubrication or dry bearing.

·LO: Followed by a number indicates specified oil lubricant.

·LG: Followed by a number indicates specified grease lubricant.

Vibration Level Codes:

·Z1, Z2, Z3: Acceleration vibration levels.

·V1, V2, V3: Velocity vibration levels.

Please note that bearing designation methods may vary from country to country, and the above explanation is specific to the BRZB designation method for miniature ball bearings.