Single Angular Contact Thrust Ball Bearings for Ball Screws

**NTN Precision Angular Contact Ball Bearings: Engineered for High-Performance Applications**

NTN is a globally recognized leader in the design and manufacture of high-precision rolling bearings, offering a comprehensive range of **Angular Contact Ball Bearings** engineered to meet the demanding requirements of industrial machinery, automotive systems, and precision equipment. These bearings are designed to accommodate combined radial and axial loads while maintaining exceptional accuracy, rigidity, and durability—making them ideal for high-speed, high-precision applications.

### **Technical Features & Performance Advantages**
NTN’s **Angular Contact Ball Bearings** are optimized for applications where precise axial load capacity and minimal friction are critical. Key features include:

– **Superior Contact Angle Design** – Available in various contact angles (typically 15°, 25°, 30°, or 40°), these bearings efficiently manage thrust loads while maintaining radial load support.
– **High-Speed Capability** – Precision-ground raceways and high-quality steel or ceramic balls reduce friction and heat generation, enabling stable operation at elevated speeds.
– **Preloaded Configurations** – Bearings can be supplied with preload to eliminate internal clearance, enhancing rigidity and positioning accuracy in machine tools, robotics, and spindle applications.
– **Advanced Lubrication & Sealing Options** – Specialized grease or oil lubrication, along with contact or non-contact seals, ensures long service life in harsh environments.
– **Single & Double-Row Designs** – Single-row bearings are compact and ideal for moderate loads, while double-row or matched sets (DB, DF, DT arrangements) provide higher load capacity and stiffness.

For applications requiring extreme precision in axial load support, NTN offers **Angular Contact Thrust Ball Bearings for Ball Screws**, specifically designed to enhance the performance of linear motion systems. These bearings feature:

– **Optimized Raceway Geometry** – Minimizes elastic deformation under thrust loads, ensuring smooth and precise ball screw operation.
– **Low Torque & High Rigidity** – Reduces energy loss and backlash in CNC machines, semiconductor equipment, and industrial automation systems.
– **Customizable Preload & Tolerance Classes** – Available in ABEC (Annular Bearing Engineering Committee) precision grades to meet exacting application requirements.

### **Typical Applications**
NTN’s Angular Contact Ball Bearings are widely used in:
– **Machine Tools & Spindles** – High-precision grinding, milling, and turning operations.
– **Automotive Systems** – Wheel hubs, transmissions, and electric vehicle (EV) motor shafts.
– **Industrial Robotics** – Articulated arms and precision motion control systems.
– **Aerospace & Defense** – Actuators, guidance systems, and landing gear mechanisms.
– **Ball Screw Assemblies** – CNC machinery, injection molding machines, and medical equipment requiring ultra-precise linear motion.

By combining advanced materials, precision manufacturing, and rigorous testing, NTN ensures that its **Angular Contact Ball Bearings** deliver unmatched reliability, efficiency, and longevity—even in the most demanding operating conditions. Whether for high-speed machining, automotive innovation, or precision automation, NTN bearings provide the performance edge needed for superior system performance.

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Part Number d D B r Mass
BST55X120-1B
55.000 mm
120.000 mm
20.000 mm
1.000 mm
BST60X120-1B
60.000 mm
120.000 mm
20.000 mm
1.000 mm
BST40X90-1B
40.000 mm
90.000 mm
20.000 mm
1.000 mm
BST40X90-20BP4
40.000 mm
90.000 mm
20.000 mm
1.000 mm
0.640 kg
BST45X100-1B
45.000 mm
100.000 mm
20.000 mm
1.000 mm
BST45X75-1B
45.000 mm
75.000 mm
15.000 mm
1.000 mm
BST50X100-1B
50.000 mm
100.000 mm
20.000 mm
1.000 mm
BST55X100-1B
55.000 mm
100.000 mm
20.000 mm
1.000 mm
BST55X100-1BP4
55.000 mm
100.000 mm
20.000 mm
1.000 mm
0.663 kg
BST55X120-1BL1P4
55.000 mm
120.000 mm
20.000 mm
1.000 mm
2A-BST45X100-1BP4
45.000 mm
100.000 mm
20.000 mm
1.000 mm
0.783 kg
2A-BST60X120-1BP4
60.000 mm
120.000 mm
20.000 mm
1.000 mm
BST17X47-1B
17.000 mm
47.000 mm
15.000 mm
1.000 mm
BST20X47-1B
20.000 mm
47.000 mm
15.000 mm
1.000 mm
BST25X62-1BP4
25.000 mm
62.000 mm
15.000 mm
1.000 mm
0.235 kg
BST25X62-1B
25.000 mm
62.000 mm
15.000 mm
1.000 mm
BST30X62-1BP4
30.000 mm
62.000 mm
15.000 mm
1.000 mm
0.208 kg
BST30X62-1B
30.000 mm
62.000 mm
15.000 mm
1.000 mm
BST35X72-1BP4
35.000 mm
72.000 mm
15.000 mm
1.000 mm
0.305 kg
BST35X72-1B
35.000 mm
72.000 mm
15.000 mm
1.000 mm
BST40X72-1BP4
40.000 mm
72.000 mm
15.000 mm
1.000 mm
0.270 kg
BST40X72-1B
40.000 mm
72.000 mm
15.000 mm
1.000 mm
BST40X72-20EP4
40.000 mm
72.000 mm
15.000 mm
1.000 mm
0.240 kg
BST40X72-20EP4/2AS
40.000 mm
72.000 mm
20.000 mm
1.000 mm
0.270 kg