21313K-C3
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What 21313K-C3 means
| Code | Position | Meaning |
|---|---|---|
2 |
Type | Spherical roller bearing |
1 |
Width series | Width series 1 |
3 |
Diameter series | Diameter series 3 (medium) |
13 |
Bore | Bore code 13 × 5 = 65 mm |
K |
Bore type | Tapered bore, taper 1:12 (mounts on an adapter or withdrawal sleeve) |
C3 |
Internal clearance | C3: radial internal clearance greater than Normal |
Read from the ISO / ABMA numbering rules and the makers' published suffix conventions. Decode any other number with the bearing number decoder.
21313K-C3 specifications
| Specification | Metric | Inch | Basis |
|---|---|---|---|
| Bore (d) | 65 mm | 2.5591 in | ISO table for this designation, confirmed by supplier data |
| Outside diameter (D) | 140 mm | 5.5118 in | Supplier catalogue listing |
| Width (B) | 33 mm | 1.2992 in | Supplier catalogue listing |
| Bearing type | Spherical roller bearing | Stated by the designation | |
| Seals / shields | Open (no seals or shields) | Stated by the designation | |
| Internal clearance | C3 (greater than Normal) | Stated by the designation | |
| Bore | Tapered bore (1:12) | Stated by the designation | |
| Tolerance class | Normal (ISO P0 / ABEC 1): no tolerance-class code | Stated by the designation | |
21313K-C3 is a spherical roller bearing, 65 mm bore × 140 mm OD × 33 mm wide (2.5591 × 5.5118 × 1.2992 in). It has C3 internal clearance and a tapered bore (1:12).
The 21313K-C3 is a spherical roller bearing with a 65mm tapered bore (1:12 taper) and C3 radial internal clearance. The tapered bore design allows for secure mounting directly on tapered shafts or adapter sleeves, while the C3 clearance provides greater internal space than standard to accommodate thermal expansion or shaft deflection.
