6321-C3
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What 6321-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) |
21 |
Bore | Bore code 21 × 5 = 105 mm |
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.
6321-C3 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 105 mm | 4.1339 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 225 mm | 8.8583 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 49 mm | 1.9291 in | ISO table for this designation, confirmed by supplier data |
| Bearing type | Deep groove ball bearing | Stated by the designation | |
| Seals / shields | Open (no seals or shields) | 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 | 6321 C3 | Brand suffix convention for this ISO size |
| TIMKEN | 6321 C3 | Brand suffix convention for this ISO size |
| FAG | 6321 C3 | Brand suffix convention for this ISO size |
| NSK | 6321 C3 | Brand suffix convention for this ISO size |
| NTN | 6321 C3 | Brand suffix convention for this ISO size |
| KOYO | 6321 C3 | Brand suffix convention for this ISO size |
| NACHI | 6321 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
6321-C3 is a deep groove ball bearing, 105 mm bore × 225 mm OD × 49 mm wide (4.1339 × 8.8583 × 1.9291 in). It has no seals or shields (open) and C3 internal clearance. Other makers sell the same size as SKF 6321 C3, TIMKEN 6321 C3, FAG 6321 C3, NSK 6321 C3.
The 6321-C3 is a deep groove ball bearing with a 105mm bore diameter, 225mm outside diameter, and 49mm width. The C3 designation indicates a radial internal clearance greater than normal, suitable for applications with thermal expansion or shaft/housing fits that reduce operating clearance.
