| Code | Description |
| MY | Copper alloy cage, rolling element guided, only for large bearings not covered by TYN cages. |
| T | Phenolic resin cage, outer ring guide |
| TS | PEEK resin cage, outer ring guide, ROBUST series oil-gas lubrication special cage. |
| TYN | Polyamide resin cage, rolling element guide (except for the seals in the 19 series). |
| E | ROBSUT series: Inner and outer ring bearing steel (SUJ2); Rolling element ultra-long life bearing rolling element (EQTF) |
| H | ROBSUT series: Inner and outer ring bearing steel (SUJ2); rolling element ceramic (Si3N4) |
| 5 | ROBSUT series: Inner and outer ring bearing steel (SUJ2); Rolling element bearing steel (SUJ2) |
| X | ROBSUT series: Inner and outer rings made of high-speed heat-resistant steel (SHX); rolling elements made of ceramic (Si3N4) |
| XE(SPINSHOT II) |
ROBSUT series: Inner and outer rings made of high-speed heat-resistant steel (SHX); rolling elements made of ceramic (Si3N4) |
| BER | ROBUST series ultra-high speed angular contact ball bearings with a contact angle of 25°. |
| A high-performance series developed for applications involving high-speed operation, low temperature rise, and ultra-precision machining. **19, 10, 29, 20 series** |
|
| **Ball materials are available in three types: steel balls (S), ultra-long life bearing rolling elements (E), and ceramic balls (H, X).** *Cages are available in four types: outer ring guided phenolic resin cage (T), rolling element guided polyamide resin cage (TYN), rolling element guided copper alloy cage (MY), and outer ring guided PEEK resin cage (T5). Selection can be made according to application and size. |
|
| Products with non-contact sealing rings are available. | |
| Size Ex：50 BNR 10 H T E34 VIV DB EL P4+Y3 MTE X (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13) |
|
| (1) Nominal bearing inner diameter (2) Type designation (3) Size series (4) Material designation (5) Cage designation (6) Oil hole designation (7) Seal designation (8) Assembly designation (9) Preload designation (10) Precision designation (11) Accessory designation (12) Grease grade (13) Grease fill amount |
|
| BNR | ROBUST series ultra-high speed angular contact ball bearings with a contact angle of 18°. |
| BSR | ROBUST series ultra-high speed angular contact ball bearings with a contact angle of 15°. |
| +Y3 | +Y3: The bearing outer diameter surface has an O-ring. Outer ring oil-supply bearings (E34) are only available for the ROBUST series. |
| P2 | ISO2 |
| P3 | Special grade (dimensional accuracy ISO 4, rotational accuracy ISO 2) |
| P4 | ISO4 |
| P4Y | Special grade (the difference in inner diameter and outer diameter is subject to special management; all others are ISO 4 grade). |
| P5 | ISO5 |
| V1V | Non-contact rubber seals. Non-contact rubber seals are provided on both sides of the bearing to prevent the intrusion of external foreign objects. Furthermore, they prevent grease from scattering, achieving high reliability and extending the grease's lifespan. |
| E34 | Outer Ring Oil-Supply Bearing (ROBUST SHOT) The outer ring features an oil groove, oil supply hole, and O-ring, specifically designed for oil-air lubrication, saving space. For ROBUST series only. |
| MTE | MTE grease is a representative type of machine tool spindle lubricant. |
| MTS | MTS grease is a representative type of machine tool spindle lubricant. |
| K | Grease filling amount: 20% of the volume. |
| L | Grease filling amount: 30% of the volume. |
| X | Grease filling amount: 15% of the volume. |
| CA | Special clearance |
| CP | Special preload |
| EL | Micro preload |
| H | Heavy preload |
| L | Light preload |
| M | Medium preload |
| DB | Double columns back-to-back, combination form <> |
| DBB | Four columns, combination form <<>> |
| DBD | Three columns, combination form <<> |
| DBT | Four columns, combination form <<<> |
| DF | Double columns face-to-face, combination form>< |
| DFD | Three columns, combination form>>< |
| DFF | Four columns, combination form>><< |
| DFT | Four columns, combination form>>>< |
| DT | Double columns side-by-side, combination form << |
| DTD | Three columns, combination form <<< |
| DTT | Four columns, combination form <<<< |
| DU | "Double-row universal assembly. Universal assembly: SU, DU, DUD, QU. During manufacturing, the front width difference is controlled to equal the back width difference." |
| DUD | "Triple-row universal assembly. Universal assembly: SU, DU, DUD, QU. During manufacturing, the front width difference is controlled to equal the back width difference." |
| QU | "Quadruple-row universal assembly. Universal assembly: SU, DU, DUD, QU. During manufacturing, the front width difference is controlled to equal the back width difference." |
| SU | Single-row universal combination. Universal combination items: SU, DU, DUD, QU. During manufacturing, the width difference between the front and back sides is controlled to equalize. |
