30311J
Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agreeCouldn't load pickup availability
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What 30311J means
| Code | Position | Meaning |
|---|---|---|
3 |
Type | Tapered roller bearing (metric) |
0 |
Width series | Width series 0 |
3 |
Diameter series | Diameter series 3 (medium) |
11 |
Bore | Bore code 11 × 5 = 55 mm |
J |
Cage | Pressed steel cage |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
30311J specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 55 mm | 2.1654 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 120 mm | 4.7244 in | Maker's catalogue (PEER Bearing), confirmed by supplier data |
| Width, assembled (T) | 31.5 mm | 1.2402 in | Maker's catalogue (PEER Bearing), confirmed by supplier data |
| Bearing type | Tapered roller bearing (metric, ISO 355) | Stated by the designation | |
| Seals / shields | Open (no seals or shields) | Stated by the designation | |
| Cage | Pressed steel cage | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
Equivalent to / interchanges with
| Brand | Part number | Basis |
|---|---|---|
| TIMKEN | 30311 | Timken Interchange Guide |
Also listed in manufacturer interchange tables (1): confirm suffix codes before ordering
- TIMKEN 30311A (Timken Interchange Guide)
These carry maker-specific suffix codes (cage, lubrication groove, design) that we have not matched one-for-one. The size is the same; check the codes against your application.
Equivalents are dimensional and closure-for-closure: same bore, outside diameter, width, seals or shields and internal clearance. Bearing interchange tables
30311J is a tapered roller bearing (metric, ISO 355), 55 mm bore × 120 mm OD × 31.5 mm wide (2.1654 × 4.7244 × 1.2402 in). It has a pressed steel cage. Published interchange tables list it as equivalent to TIMKEN 30311.
