6318-C4
Tier-one manufacturer — brand supplied may vary ✓ Dimensions checked: ISO table and supplier data agreeCouldn't load pickup availability
Ships from our European partner stock — allow 5–8 business days
Image is for illustration purposes only.
What 6318-C4 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) |
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.
6318-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) | 190 mm | 7.4803 in | ISO table for this designation, confirmed by supplier data |
| Width (B) | 43 mm | 1.6929 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 | 6318 C4 | Brand suffix convention for this ISO size |
| TIMKEN | 6318 C4 | Brand suffix convention for this ISO size |
| FAG | 6318 C4 | Brand suffix convention for this ISO size |
| NSK | 6318 C4 | Brand suffix convention for this ISO size |
| NTN | 6318 C4 | Brand suffix convention for this ISO size |
| KOYO | 6318 C4 | Brand suffix convention for this ISO size |
| NACHI | 6318 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
6318-C4 is a deep groove ball bearing, 90 mm bore × 190 mm OD × 43 mm wide (3.5433 × 7.4803 × 1.6929 in). It has no seals or shields (open) and C4 internal clearance. Other makers sell the same size as SKF 6318 C4, TIMKEN 6318 C4, FAG 6318 C4, NSK 6318 C4.
The 6318-C4 is a deep groove ball bearing with a 90mm bore diameter, 190mm outside diameter, and 43mm width. The C4 designation indicates a radial internal clearance greater than C3, providing increased clearance for applications involving thermal expansion or shaft deflection.
