6311-ZZ-C3
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What 6311-ZZ-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 |
ZZ |
Closure | Metal shields, 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-ZZ-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 | Metal shields, 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 2Z C3 | Brand suffix convention for this ISO size |
| TIMKEN | 6311 ZZ C3 | Brand suffix convention for this ISO size |
| FAG | 6311 2ZR C3 | Brand suffix convention for this ISO size |
| NSK | 6311 ZZ C3 | Brand suffix convention for this ISO size |
| NTN | 6311 ZZ C3 | Brand suffix convention for this ISO size |
| KOYO | 6311 ZZ C3 | Brand suffix convention for this ISO size |
| NACHI | 6311 ZZE 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-ZZ-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 metal shields on both sides and C3 internal clearance. Other makers sell the same size as SKF 6311 2Z C3, TIMKEN 6311 ZZ C3, FAG 6311 2ZR C3, NSK 6311 ZZ C3.
The 6311-ZZ-C3 is a deep groove ball bearing with 55mm bore diameter, 120mm outside diameter, and 29mm width. It features metal shields on both sides for protection against contaminants while allowing pre-lubrication, and C3 radial clearance for applications with thermal expansion or interference fits.
