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KOYO 6921-1ZZ Deep Groove Ball Bearings
KOYO 6921-1ZZ single-row deep groove ball bearing – shielded (zz). Bore 105mm x OD 145mm x width 20mm. Dynamic load rating 53.0 kN.
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- Bore 105mm x OD 145mm x width 20mm
- Carries radial and axial loads in both directions
- Dynamic load rating 53.0 kN - static 42.1 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 | 6921-1 |
| Inner Diameter (Bore) | 105 mm |
| Outer Diameter | 145 mm |
| Width | 20 mm |
| Seal Type | ZZ |
| Material | Chrome Steel (AISI 52100) |
| Clearance | CN |
| Dynamic Load Rating (Cr) | 53000 N (53.0 kN) |
| Static Load Rating (C₀) | 42100 N |
| Limiting Speed (Grease) | 4300 rpm |
| Limiting Speed (Oil) | 5100 rpm |
| Fillet Radius (r min) | 1.1 mm |
| Fatigue Load Limit (Cu) | 1.95 kN |
| Weight | 1.0 kg |
| Features & Benefits | Bore 105mm x OD 145mm x width 20mm Carries radial and axial loads in both directions Dynamic load rating 53.0 kN - static 42.1 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 6921-1ZZ is a single-row deep groove ball bearing with double metal shields (ZZ) – measuring 105mm bore x 145mm outside diameter x 20mm width.
Load ratings: dynamic 53.0 kN (Cr) and static 42.1 kN (C0r) – fatigue load limit 1.95 kN. Limiting speed 4300 rpm with grease lubrication and 5100 rpm with oil lubrication. Minimum fillet radius 1.1mm.
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.
Manufactured by KOYO (JTEKT) in chrome steel to ISO standards.
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