NKI 55/25 TN Needle Roller Bearing 55x72x25mm
Category: Needle Roller Bearings
Specifications
Inner Diameter (ID)
55
Outer Diameter (OD)
72
Width (W)
25
Overall Size (IDxODxW)
55x72x25
Dynamic Load Rating
46.8 kN
Static Load Rating
110 kN
Reference Speed
6 700 rpm
Limiting Speed
7 500 rpm
Cage Material
Non-Metallic
Seal Type
None On Both Sides
Clearance
CN
Precision
Grade 0
Operating Temperature
-30 °C to +120 °C
Mass
0.254 kg
Details
Needle Roller Bearings have long, thin cylindrical rollers resembling needles. They excel at handling high radial loads in tight spaces, making them ideal for automotive transmissions, gearboxes, and machinery. Lightweight, cost-effective, and suitable for high speeds, they distribute loads evenly and require proper lubrication for durability. The outer ring includes two non-separable closure rings that act as flanges to guide the bearing axially.
SPECIFICATIONS
| Inner Diameter | 55 mm | Number of Rows | Single Row |
| Outer Diameter | 72 mm | Cage Material | Non-Metallic |
| Width | 25 mm | Seal Type | None On Both Sides |
| Dynamic Load Rating | 46.8 kN | Clearance | CN |
| Static Load Rating | 110 kN | Precision | Grade 0 |
| Fatigue Load Limit | 13.4 kN | Min Temperature | -30 °C |
| Reference Speed | 6 700 rpm | Max Temperature | +120 °C |
| Limiting Speed | 7 500 rpm | Size Standard | Metric System |
| Rolling Element | Roller | Mass | 0.254 kg |
FEATURES AND BENEFITS
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High load-carrying capacity.
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Low cross-sectional height.
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Support both radial and axial loads.
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High stiffness with separable design.
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