6218-C4
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What 6218-C4 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 |
C4 |
Internal clearance | C4: radial internal clearance greater than C3 |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
6218-C4 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 | C4 (greater than C3) | 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 C4 | Brand suffix convention for this ISO size |
| TIMKEN | 6218 C4 | Brand suffix convention for this ISO size |
| FAG | 6218 C4 | Brand suffix convention for this ISO size |
| NSK | 6218 C4 | Brand suffix convention for this ISO size |
| NTN | 6218 C4 | Brand suffix convention for this ISO size |
| KOYO | 6218 C4 | Brand suffix convention for this ISO size |
| NACHI | 6218 C4 | 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-C4 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) and C4 internal clearance. Other makers sell the same size as SKF 6218 C4, TIMKEN 6218 C4, FAG 6218 C4, NSK 6218 C4.
The 6218-C4 is a deep groove ball bearing with a 90mm bore diameter, 160mm outside diameter, and 30mm width. This single-row radial bearing features C4 internal clearance, which is greater than standard C3 clearance and suitable for applications with thermal expansion or interference fit requirements.
