6311-2RS-C3
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What 6311-2RS-C3 means
| Code | Position | Meaning |
|---|---|---|
6 |
Type | Deep groove ball bearing |
3 |
Diameter series | Diameter series 3 (medium): fixes OD and width for the bore (ISO 15) |
11 |
Bore | Bore code 11 × 5 = 55 mm |
2RS |
Closure | Contact rubber seals, both sides |
C3 |
Internal clearance | C3: radial internal clearance greater than Normal |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
6311-2RS-C3 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 | ISO table for this designation, confirmed by supplier data |
| Width (B) | 29 mm | 1.1417 in | ISO table for this designation, confirmed by supplier data |
| Bearing type | Deep groove ball bearing | Stated by the designation | |
| Seals / shields | Contact rubber seals, both sides | Stated by the designation | |
| Internal clearance | C3 (greater than Normal) | 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 |
|---|---|---|
| SKF | 6311 2RSH C3 | Brand suffix convention for this ISO size |
| TIMKEN | 6311 2RS C3 | Brand suffix convention for this ISO size |
| FAG | 6311 2RSR C3 | Brand suffix convention for this ISO size |
| NSK | 6311 DDU C3 | Brand suffix convention for this ISO size |
| NTN | 6311 LLU C3 | Brand suffix convention for this ISO size |
| KOYO | 6311 2RS C3 | Brand suffix convention for this ISO size |
| NACHI | 6311 2NSE C3 | Brand suffix convention for this ISO size |
Equivalents are dimensional and closure-for-closure: same bore, outside diameter, width, seals or shields and internal clearance. Bearing interchange tables
6311-2RS-C3 is a deep groove ball bearing, 55 mm bore × 120 mm OD × 29 mm wide (2.1654 × 4.7244 × 1.1417 in). It has rubber contact seals on both sides and C3 internal clearance. Other makers sell the same size as SKF 6311 2RSH C3, TIMKEN 6311 2RS C3, FAG 6311 2RSR C3, NSK 6311 DDU C3.
The 6311-2RS-C3 is a deep groove ball bearing with 55mm bore, 120mm outer diameter, and 29mm width. It features contact rubber seals on both sides to protect against contamination and retain lubrication, with C3 internal clearance for applications involving thermal expansion or shaft deflection.
