6218
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What 6218 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) |
18 |
Bore | Bore code 18 × 5 = 90 mm |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
6218 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 90 mm | 3.5433 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 160 mm | 6.2992 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 30 mm | 1.1811 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 | 6218-J | SKF Master Interchange |
| FAG | 6218 | SKF Master Interchange |
| NTN | 6218 | SKF Master Interchange |
| KOYO | 6218 | SKF Master Interchange |
| NACHI | 6218 | SKF Master Interchange |
| TIMKEN | 6218 | Brand suffix convention for this ISO size |
| NSK | 6218 | 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
6218 is a deep groove ball bearing, 90 mm bore × 160 mm OD × 30 mm wide (3.5433 × 6.2992 × 1.1811 in). It has no seals or shields (open). Published interchange tables list it as equivalent to SKF 6218-J, FAG 6218, NTN 6218, KOYO 6218.
The 6218 is a deep groove ball bearing with a 90mm bore diameter, 160mm outside diameter, and 30mm width. This open design bearing has no seals or shields, allowing for higher speed operation and easy lubrication access in appropriate environments.
