6221
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What 6221 means
| Code | Position | Meaning |
|---|---|---|
6 |
Type | Deep groove ball bearing |
2 |
Diameter series | Diameter series 2 (light): fixes OD and width for the bore (ISO 15) |
21 |
Bore | Bore code 21 × 5 = 105 mm |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
6221 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 105 mm | 4.1339 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 190 mm | 7.4803 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 36 mm | 1.4173 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 | Normal (CN): no clearance code in the designation | 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 | 6221 | Brand suffix convention for this ISO size |
| TIMKEN | 6221 | Brand suffix convention for this ISO size |
| FAG | 6221 | Brand suffix convention for this ISO size |
| NSK | 6221 | Brand suffix convention for this ISO size |
| NTN | 6221 | Brand suffix convention for this ISO size |
| KOYO | 6221 | Brand suffix convention for this ISO size |
| NACHI | 6221 | 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
6221 is a deep groove ball bearing, 105 mm bore × 190 mm OD × 36 mm wide (4.1339 × 7.4803 × 1.4173 in). It has no seals or shields (open). Other makers sell the same size as SKF 6221, TIMKEN 6221, FAG 6221, NSK 6221.
The 6221 is a deep groove ball bearing with a 105mm bore diameter, 190mm outside diameter, and 36mm width. This open design bearing has no seals or shields, allowing for higher speed capabilities and the option for external sealing arrangements.
