ROBUST Series Ultra High-Speed Angular Contact Ball Bearings

**Introduction to NSK Super Precision Bearings: ROBUST Series Ultra High Speed Angular Contact Ball Bearings**

In the demanding world of high-speed, high-precision motion control, NSK’s **Super Precision Angular Contact Ball Bearings—ROBUST Series** stand out as a benchmark for reliability, speed, and accuracy. Engineered to meet the rigorous requirements of advanced industrial machinery, automotive systems, and precision equipment, these ultra-high-speed bearings deliver exceptional performance under extreme operating conditions.

### **Technical Features & Design Innovations**
The **ROBUST Series** incorporates cutting-edge design elements to optimize performance in high-speed applications:

– **Advanced Materials & Heat Treatment:** Manufactured from premium-grade steel and subjected to specialized heat treatment processes, these bearings exhibit superior hardness, fatigue resistance, and durability, even under heavy loads and high rotational speeds.
– **Optimized Internal Geometry:** Precision-machined raceways and ball profiles minimize friction and heat generation, ensuring smooth operation at ultra-high speeds (reaching **dn values exceeding 2 million**).
– **Enhanced Cage Designs:** High-strength polymer or lightweight alloy cages reduce centrifugal forces, preventing slippage and maintaining stability at extreme RPMs.
– **Sealing & Lubrication Options:** Customizable sealing solutions and advanced grease formulations extend service life while reducing maintenance needs in contaminated or high-temperature environments.

### **Performance Advantages**
NSK’s **ROBUST Series** bearings excel in critical performance metrics:

– **Ultra-High Speed Capability:** Designed for spindle and rotor applications, these bearings minimize vibration and heat buildup, enabling stable operation in CNC machine tools, turbochargers, and electric vehicle motors.
– **Rigidity & Load Capacity:** Angular contact design supports combined radial and axial loads, making them ideal for applications requiring high stiffness, such as robotics, aerospace actuators, and semiconductor manufacturing equipment.
– **Extended Service Life:** Reduced wear and optimized lubrication contribute to longer operational lifespans, lowering total cost of ownership for industrial users.
– **Noise & Vibration Reduction:** Precision tolerances (ABEC 7/P4 or higher) ensure quiet, smooth rotation, critical for medical imaging devices and high-end automation systems.

### **Typical Applications**
The **ROBUST Series** is deployed across industries where precision and speed are non-negotiable:

– **Industrial Machinery:** High-speed spindles in CNC machining centers, grinding machines, and lathes.
– **Automotive Systems:** Turbocharger shafts, hybrid/electric vehicle drivetrains, and performance transmission systems.
– **Precision Equipment:** Robotics, optical positioning stages, and aerospace gyroscopes.

By combining **NSK’s decades of super-precision engineering** with robust materials and innovative design, the **ROBUST Series** ensures unmatched performance for the most challenging motion control applications. Whether in high-speed manufacturing or cutting-edge automotive tech, these bearings provide the reliability and precision needed to push technological boundaries.

For industries where failure is not an option, NSK’s **Super Precision Angular Contact Ball Bearings** deliver speed, accuracy, and endurance—engineered for the future of motion.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
r1(min.)
mm
Cr
kN
C0r
kN
Grease
min-1
Oil (Oil-air)
min-1
60BER20EV1V
60
95
22
1.1
0.6
18.8
13.1
16700
60BER20HV1V
60
95
22
1.1
0.6
18.8
12.5
20700
60BER20XV1V
60
95
22
1.1
0.6
29.9
12.5
24600
60BNR20EV1V
60
95
22
1.1
0.6
19.7
13.7
19400
60BNR20HV1V
60
95
22
1.1
0.6
19.7
13.1
23300
60BNR20XV1V
60
95
22
1.1
0.6
31.5
13.1
27100
65BER19E
65
90
13
1
0.6
18.3
12.6
16700
23500
65BER19H
65
90
13
1
0.6
18.3
12.1
20700
32300
65BER19X
65
90
13
1
0.6
29.1
12.1
24600
38800
65BNR19E
65
90
13
1
0.6
19.2
13.2
19400
27700
65BNR19H
65
90
13
1
0.6
19.2
12.6
23300
36200
65BNR19X
65
90
13
1
0.6
30.5
12.6
27100
42600
65BER29EV1V
65
90
16
1
0.6
18.3
12.6
16700
65BER29HV1V
65
90
16
1
0.6
18.3
12.1
20700
65BER29XV1V
65
90
16
1
0.6
29.1
12.1
24600
65BNR29EV1V
65
90
16
1
0.6
19.2
13.2
19400
65BNR29HV1V
65
90
16
1
0.6
19.2
12.6
23300
65BNR29XV1V
65
90
16
1
0.6
30.5
12.6
27100
65BER10E
65
100
18
1.1
0.6
19.5
14.2
15700
22100
65BER10H
65
100
18
1.1
0.6
19.5
13.6
19400
30400
65BER10X
65
100
18
1.1
0.6
31.0
13.6
23100
36400
65BERD10J
65
100
18
1.1
0.6
39.5
16.7
19400
30400
65BERD10X
65
100
18
1.1
0.6
50.0
16.7
23100
36400
65BNR10E
65
100
18
1.1
0.6
20.4
14.8
18200
26000