**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.
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 |
|
17 |
30 |
7 |
0.3 |
0.15 |
6.45 |
1.47 |
93700 |
128000 |
|
8 |
22 |
7 |
0.3 |
0.15 |
2.91 |
0.835 |
107000 |
147000 |
|
12 |
28 |
8 |
0.3 |
0.15 |
6.45 |
1.27 |
110000 |
150000 |
|
17 |
35 |
10 |
0.3 |
0.15 |
5.60 |
1.85 |
73100 |
108000 |
|
8 |
22 |
7 |
0.3 |
0.15 |
4.60 |
0.800 |
147000 |
200000 |
|
12 |
32 |
10 |
0.6 |
0.3 |
6.40 |
1.89 |
86400 |
128000 |
|
10 |
22 |
6 |
0.3 |
0.15 |
2.24 |
0.685 |
119000 |
175000 |
|
12 |
32 |
10 |
0.6 |
0.3 |
6.40 |
1.98 |
72800 |
100000 |
|
10 |
22 |
6 |
0.3 |
0.15 |
2.24 |
0.715 |
100000 |
138000 |
|
12 |
32 |
10 |
0.6 |
0.3 |
10.1 |
1.89 |
100000 |
137000 |
|
10 |
22 |
6 |
0.3 |
0.15 |
3.55 |
0.685 |
138000 |
188000 |
|
15 |
28 |
7 |
0.3 |
0.15 |
3.75 |
1.26 |
88400 |
131000 |
|
10 |
26 |
8 |
0.3 |
0.15 |
3.80 |
1.13 |
106000 |
156000 |
|
15 |
28 |
7 |
0.3 |
0.15 |
3.75 |
1.31 |
74500 |
103000 |
|
10 |
26 |
8 |
0.3 |
0.15 |
3.80 |
1.18 |
88900 |
123000 |
|
15 |
28 |
7 |
0.3 |
0.15 |
5.90 |
1.26 |
103000 |
140000 |
|
10 |
26 |
8 |
0.3 |
0.15 |
6.05 |
1.13 |
123000 |
167000 |
|
15 |
32 |
9 |
0.3 |
0.15 |
5.25 |
1.65 |
80900 |
120000 |
|
10 |
30 |
9 |
0.6 |
0.3 |
4.85 |
1.41 |
95000 |
140000 |
|
15 |
32 |
9 |
0.3 |
0.15 |
5.30 |
1.72 |
68100 |
93700 |