Ball Bearings

**Introduction to NSK Bearing Units & Ball Bearings: Precision Motion and Control Solutions**

NSK is a global leader in precision motion and control technologies, delivering high-performance bearing solutions that enhance efficiency, reliability, and longevity in demanding industrial and automotive applications. Among its extensive product portfolio, **NSK Bearing Units and Ball Bearings** stand out for their advanced engineering, superior load capacity, and exceptional durability. Designed to meet the rigorous demands of modern machinery, these components play a critical role in minimizing friction, reducing energy consumption, and ensuring smooth rotational motion in everything from heavy industrial equipment to precision automotive systems.

### **Technical Features & Performance Advantages**

NSK Bearing Units integrate high-quality ball bearings with robust housings, offering a complete, ready-to-install solution that simplifies maintenance and improves operational reliability. Key features include:

– **Precision-Grade Ball Bearings**: Manufactured with high-grade steel and advanced heat treatment processes, NSK ball bearings deliver ultra-low friction, high-speed capability, and extended service life even under heavy radial and axial loads.
– **Sealed & Lubricated Designs**: Many NSK bearing units come with integrated seals and pre-lubrication, preventing contamination and reducing the need for frequent maintenance—ideal for harsh environments such as food processing, mining, or chemical industries.
– **Corrosion-Resistant Materials**: Options with stainless steel bearings or special coatings ensure resistance to moisture, chemicals, and extreme temperatures, making them suitable for marine, pharmaceutical, and cleanroom applications.
– **Plug-and-Play Installation**: Pre-aligned bearing units with standardized mounting dimensions (e.g., PNS, SN, or UCP series) allow for quick replacement and reduced downtime in conveyor systems, pumps, and gearboxes.

### **Typical Applications Across Industries**

NSK Bearing Units and Ball Bearings are widely used in sectors where precision, durability, and energy efficiency are paramount:

– **Industrial Machinery**: Conveyors, electric motors, and material handling systems benefit from NSK’s low-maintenance bearing units, which ensure smooth operation under continuous loads.
– **Automotive Systems**: From wheel hubs to transmission components, NSK’s high-speed ball bearings enhance vehicle performance while reducing noise and vibration.
– **Precision Equipment**: Robotics, medical devices, and semiconductor manufacturing rely on NSK’s ultra-precise bearings for repeatable motion control and minimal backlash.
– **Heavy-Duty Applications**: Steel mills, wind turbines, and construction machinery utilize NSK’s reinforced bearing units to withstand shock loads and harsh operating conditions.

By combining cutting-edge materials, precision manufacturing, and innovative sealing technologies, NSK Bearing Units and Ball Bearings set the benchmark for reliability in motion control. Whether optimizing production lines or enhancing automotive performance, NSK’s solutions ensure maximum uptime, reduced energy consumption, and long-term cost savings—proving why they are the preferred choice for engineers worldwide.

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Designations Nominal Dimensions Basic Load Ratings
d
mm
D
mm
B,B4
mm
B1
mm
C
mm
Cr
kN
C0r
kN
UC321D1
105
225
112
57
184
153
UK322D1
110
240
80
105
59
205
179
UEL322D1
110
240
106.4
141.3
59
205
179
UC322D1
110
240
117
59
205
179
UK324D1
120
260
86
112
63
207
185
UC324D1
120
260
126
63
207
185
UK326D1
130
280
90
121
67
229
214
UC326D1
130
280
135
67
229
214
UK328D1
140
300
95
131
71
253
246
UC328D1
140
300
145
71
253
246
UC320-400D1
101.6
215
108
55
173
141
UEL321D1
105
225
104.8
139.7
57
184
153
UKS317
85
180
60
82
47
133
97
UEL318D1
90
190
87.3
115.9
49
143
107
UEL317D1
85
180
84.1
109.5
47
133
97
UELS318
90
190
87.3
115.9
49
143
107
UELS317
85
180
84.1
109.5
47
133
97
UC318D1
90
190
96
49
143
107
UC317D1
85
180
96
47
133
97
UCS318
90
190
96
49
143
107