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KOYO 6311ZZ Deep Groove Ball Bearings
KOYO 6311ZZ single-row deep groove ball bearing – shielded (zz). Bore 55mm x OD 120mm x width 29mm. Dynamic load rating 89.5 kN.
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- Bore 55mm x OD 120mm x width 29mm
- Carries radial and axial loads in both directions
- Dynamic load rating 89.5 kN - static 45.0 kN
- KOYO (JTEKT) chrome steel quality
- Metal shields retain grease and exclude dust - permitting higher speeds
- Single-row deep groove ball bearing - Shielded (ZZ)
| Brand | Koyo JTEKT |
|---|---|
| Bearing Type | Deep Groove Ball Bearings |
| Series | 6311 |
| Inner Diameter (Bore) | 55 mm |
| Outer Diameter | 120 mm |
| Width | 29 mm |
| Seal Type | ZZ |
| Material | Chrome Steel (AISI 52100) |
| Clearance | CN |
| Dynamic Load Rating (Cr) | 89500 N (89.5 kN) |
| Static Load Rating (C₀) | 45000 N |
| Limiting Speed (Grease) | 5600 rpm |
| Limiting Speed (Oil) | 6700 rpm |
| Fillet Radius (r min) | 2 mm |
| Fatigue Load Limit (Cu) | 3.45 kN |
| Weight | 1.37 kg |
| Features & Benefits | Bore 55mm x OD 120mm x width 29mm Carries radial and axial loads in both directions Dynamic load rating 89.5 kN - static 45.0 kN KOYO (JTEKT) chrome steel quality Metal shields retain grease and exclude dust - permitting higher speeds Single-row deep groove ball bearing - Shielded (ZZ) |
The KOYO 6311ZZ is a single-row deep groove ball bearing with double metal shields (ZZ) – measuring 55mm bore x 120mm outside diameter x 29mm width.
Load ratings: dynamic 89.5 kN (Cr) and static 45.0 kN (C0r) – fatigue load limit 3.45 kN. Limiting speed 5600 rpm with grease lubrication and 6700 rpm with oil lubrication. Minimum fillet radius 2mm.
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.
Manufactured by KOYO (JTEKT) in chrome steel to ISO standards.
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