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KOYO 6312ZZC3 Deep Groove Ball Bearings
KOYO 6312ZZC3 single-row deep groove ball bearing – shielded (zz). Bore 60mm x OD 130mm x width 31mm. Dynamic load rating 102 kN. C3 internal clearance.
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| Brand | Koyo JTEKT |
|---|---|
| Bearing Type | Deep Groove Ball Bearings |
| Series | 6312 |
| Inner Diameter (Bore) | 60 mm |
| Outer Diameter | 130 mm |
| Width | 31 mm |
| Seal Type | ZZ |
| Material | Chrome Steel (AISI 52100) |
| Clearance | C3 |
| Dynamic Load Rating (Cr) | 102000 N (102 kN) |
| Static Load Rating (C₀) | 52200 N |
| Limiting Speed (Grease) | 5200 rpm |
| Limiting Speed (Oil) | 6200 rpm |
| Fillet Radius (r min) | 2.1 mm |
| Fatigue Load Limit (Cu) | 3.95 kN |
| Weight | 1.7 kg |
The KOYO 6312ZZC3 is a single-row deep groove ball bearing with double metal shields (ZZ) – measuring 60mm bore x 130mm outside diameter x 31mm width.
Load ratings: dynamic 102 kN (Cr) and static 52.2 kN (C0r) – fatigue load limit 3.95 kN. Limiting speed 5200 rpm with grease lubrication and 6200 rpm with oil lubrication. Minimum fillet radius 2.1mm.
Deep groove ball bearings are the most widely used bearing type – carrying radial and axial loads in both directions with low friction and high running accuracy. The metal shields retain the factory-filled grease and keep out dust and debris while allowing higher speeds than a contact seal.
C3 internal clearance: this bearing is supplied with greater than normal (CN) internal radial clearance. C3 suits applications with an interference fit on the shaft or in the housing – a temperature differential between the inner and outer rings – or shaft expansion under load – where the extra clearance prevents the bearing from becoming preloaded in service.
Manufactured by KOYO (JTEKT) in chrome steel to ISO standards.
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