6318-ZZ
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What 6318-ZZ 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 |
ZZ |
Closure | Metal shields, both sides |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
6318-ZZ 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 | Metal shields, both sides | 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 | 6318 2Z | Brand suffix convention for this ISO size |
| TIMKEN | 6318 ZZ | Brand suffix convention for this ISO size |
| FAG | 6318 2ZR | Brand suffix convention for this ISO size |
| NSK | 6318 ZZ | Brand suffix convention for this ISO size |
| NTN | 6318 ZZ | Brand suffix convention for this ISO size |
| KOYO | 6318 ZZ | Brand suffix convention for this ISO size |
| NACHI | 6318 ZZE | 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-ZZ is a deep groove ball bearing, 90 mm bore × 190 mm OD × 43 mm wide (3.5433 × 7.4803 × 1.6929 in). It has metal shields on both sides. Other makers sell the same size as SKF 6318 2Z, TIMKEN 6318 ZZ, FAG 6318 2ZR, NSK 6318 ZZ.
The 6318-ZZ is a deep groove ball bearing with a 90mm bore diameter, 190mm outside diameter, and 43mm width. It features metal shields on both sides to protect the bearing internals from contaminants while retaining pre-packed lubrication.
