Single Direction Thrust Ball Bearing

**NTN Single Direction Thrust Ball Bearings: Precision, Durability, and High-Performance Load Handling**

NTN is a globally recognized leader in the design and manufacture of high-performance rolling bearings, delivering innovative solutions for industrial, automotive, and precision applications. Among its extensive product lineup, **NTN Single Direction Thrust Ball Bearings** stand out as a critical component for applications requiring robust axial load support, smooth operation, and long service life. Engineered with precision and durability in mind, these bearings are ideal for machinery and systems where space constraints, high thrust loads, and rotational accuracy are key considerations.

### **Technical Features & Design Excellence**
NTN’s Single Direction Thrust Ball Bearings are designed with a **separable structure**, allowing for easy installation and maintenance. The bearings consist of a **shaft washer (inner ring), housing washer (outer ring), and a ball-and-cage assembly**, ensuring optimal load distribution and reduced friction. Key technical features include:

– **High Axial Load Capacity**: Specifically engineered to handle **unidirectional axial loads**, these bearings efficiently support heavy thrust forces while minimizing radial load transfer.
– **Precision-Grade Components**: Manufactured to tight tolerances, NTN bearings ensure smooth rotation and minimal vibration, critical for high-speed applications.
– **Advanced Cage Designs**: Options include **stamped steel, machined brass, or polyamide cages**, each offering distinct advantages in speed capability, lubrication retention, and corrosion resistance.
– **Heat-Treated Races**: The hardened washer surfaces enhance wear resistance and extend bearing life under demanding conditions.
– **Lubrication Versatility**: Compatible with grease or oil lubrication, NTN thrust bearings are optimized for various operating environments, from high-temperature industrial settings to automotive transmissions.

### **Performance Advantages**
NTN’s Single Direction Thrust Ball Bearings deliver several performance benefits:

– **Reduced Friction & Energy Loss**: Precision-ground raceways and high-quality steel reduce rolling resistance, improving efficiency in power transmission systems.
– **Enhanced Durability**: Robust construction and premium materials resist wear, even in high-load, high-speed applications.
– **Compact & Lightweight Design**: Ideal for applications with limited axial space, such as automotive clutches, gearboxes, and steering systems.
– **Low Noise & Vibration**: Superior surface finishes and cage stability contribute to quieter operation, essential for precision machinery and electric vehicles.

### **Typical Applications**
These bearings are widely used across industries, including:

– **Automotive Systems**: Clutch release mechanisms, transmission thrust supports, and steering column assemblies.
– **Industrial Machinery**: Pumps, compressors, machine tool spindles, and agricultural equipment.
– **Aerospace & Defense**: Actuators, rotor systems, and landing gear components.
– **Energy & Heavy Equipment**: Wind turbine pitch control, hydraulic systems, and construction machinery.

By combining **advanced engineering, rigorous quality control, and application-specific customization**, NTN’s Single Direction Thrust Ball Bearings provide reliable performance in the most demanding environments. Whether in high-speed automotive drivetrains or heavy industrial equipment, NTN ensures precision, longevity, and efficiency—reinforcing its reputation as a trusted global bearing solutions provider.

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Part Number d D T r Mass
51309P5
45.000 mm
85.000 mm
28.000 mm
1.000 mm
0.673 kg
51310
50.000 mm
95.000 mm
31.000 mm
1.100 mm
0.922 kg
51310C3
50.000 mm
95.000 mm
31.000 mm
1.100 mm
0.922 kg
51311
55.000 mm
105.000 mm
35.000 mm
1.100 mm
1.279 kg
51311C3
55.000 mm
105.000 mm
35.000 mm
1.100 mm
1.279 kg
51312
60.000 mm
110.000 mm
35.000 mm
1.100 mm
1.370 kg
51312C3
60.000 mm
110.000 mm
35.000 mm
1.100 mm
1.370 kg
51313
65.000 mm
115.000 mm
36.000 mm
1.100 mm
1.510 kg
51313C3
65.000 mm
115.000 mm
36.000 mm
1.100 mm
1.510 kg
51307
35.000 mm
68.000 mm
24.000 mm
1.000 mm
0.383 kg
51314
70.000 mm
125.000 mm
40.000 mm
1.100 mm
2.010 kg
51307C3
35.000 mm
68.000 mm
24.000 mm
1.000 mm
0.383 kg
51314C3
70.000 mm
125.000 mm
40.000 mm
1.100 mm
2.010 kg
51308
40.000 mm
78.000 mm
26.000 mm
1.000 mm
0.530 kg
51315
75.000 mm
135.000 mm
44.000 mm
1.500 mm
2.610 kg
51308C3
40.000 mm
78.000 mm
26.000 mm
1.000 mm
0.530 kg
51315C3
75.000 mm
135.000 mm
44.000 mm
1.500 mm
2.610 kg
51308P5
40.000 mm
78.000 mm
26.000 mm
1.000 mm
0.530 kg
51252
260.000 mm
360.000 mm
79.000 mm
2.100 mm
24.200 kg
51252C3
260.000 mm
360.000 mm
79.000 mm
2.100 mm
24.200 kg