Four-Point Contact Ball Bearings

**Precision in Motion: NSK’s Advanced Ball Bearing Solutions for Demanding Applications**

In industries where precision, reliability, and efficiency are non-negotiable, NSK’s high-performance ball bearings stand as a cornerstone of motion control technology. Designed to meet the rigorous demands of industrial machinery, automotive systems, and precision equipment, NSK’s angular contact ball bearings and four-point contact ball bearings deliver exceptional load capacity, rigidity, and operational longevity. These bearings are engineered to optimize performance in applications requiring high-speed rotation, axial and radial load support, and minimal friction—ensuring smooth, precise motion even under extreme conditions.

### **Technical Excellence and Performance Advantages**

**Angular Contact Ball Bearings**
NSK’s angular contact ball bearings are precision-engineered to handle combined radial and axial loads, making them ideal for applications where high rotational accuracy and rigidity are critical. Their unique contact angle design allows them to support unidirectional thrust loads while maintaining low friction and high-speed capability. Key features include:
– **Optimized Contact Angles (15°, 25°, 30°, or 40°)** – Tailored to specific load and speed requirements.
– **Enhanced Rigidity and Precision** – Ideal for machine tool spindles, robotics, and high-speed motors.
– **Advanced Cage Designs** – Reduce friction and wear, extending service life.
– **Sealed and Lubricated Options** – For contamination resistance in harsh environments.

**Four-Point Contact Ball Bearings**
NSK’s four-point contact ball bearings are designed to accommodate axial loads in both directions while also handling moderate radial loads—making them a versatile solution for compact, high-efficiency designs. Their unique raceway geometry ensures optimal load distribution, reducing stress and wear. Key benefits include:
– **Bidirectional Axial Load Support** – Eliminates the need for paired bearing arrangements.
– **Space-Saving Design** – Reduces system complexity and weight.
– **High-Speed Performance** – Low friction and heat generation enhance efficiency.
– **Robust Construction** – Suitable for turntables, robotics, and aerospace applications.

### **Applications Across Industries**
NSK’s precision ball bearings are integral to a wide range of high-performance systems:
– **Industrial Machinery** – Machine tool spindles, CNC equipment, and automation systems benefit from high rigidity and accuracy.
– **Automotive Systems** – Electric power steering, transmissions, and wheel hubs rely on durable, low-friction bearings.
– **Precision Equipment** – Medical devices, semiconductor manufacturing, and robotics demand ultra-smooth motion control.

By combining advanced materials, precision manufacturing, and innovative design, NSK ensures that its bearings deliver unmatched performance, durability, and efficiency—helping industries push the boundaries of motion control technology. Whether in high-speed automation or heavy-load industrial applications, NSK’s bearings provide the reliability needed to keep systems running at peak performance.

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Designations Nominal Dimensions Basic Load Ratings Speeds
Limiting Speeds
d
mm
D
mm
B
mm
r(min.)
mm
Ca
N
C0a
N
Grease
min-1
Oil (Oil-bath)
min-1
QJ209
45
85
19
1.1
60000
88500
6300
8500
QJ316
80
170
39
2.1
223000
360000
3200
4300
QJ1022
110
170
28
2
153000
315000
2800
3800
QJ309
45
100
25
1.5
96000
133000
5600
7500
QJ1017
85
130
22
1.1
86500
176000
3800
5000
QJ222
110
200
38
2.1
259000
490000
2600
3400
QJ210
50
90
20
1.1
63000
97000
5600
8000
QJ217
85
150
28
2
157000
276000
3400
4800
QJ310
50
110
27
2
112000
159000
5000
6700
QJ317
85
180
41
3
240000
405000
3000
4000
QJ211
55
100
21
1.5
78000
122000
5300
7100
QJ1018
90
140
24
1.5
103000
208000
3400
4800
QJ311
55
120
29
2
130000
187000
4500
6300
QJ218
90
160
30
2
180000
320000
3200
4300
QJ212
60
110
22
1.5
94000
150000
4800
6300
QJ318
90
190
43
3
258000
450000
2800
3800
QJ312
60
130
31
2.1
148000
217000
4300
5600
QJ1019
95
145
24
1.5
106000
220000
3400
4500
QJ213
65
120
23
1.5
107000
179000
4300
6000
QJ219
95
170
32
2.1
195000
340000
3000
4000