Square Flanged Units

**Introduction to NSK Bearing Units: Flanged Ball Bearing Units (Square Flanged Units)**

NSK’s **Flanged Ball Bearing Units (Square Flanged Units)** represent a robust and precision-engineered solution for applications demanding reliable rotational motion, high load capacity, and ease of installation. Designed for industrial machinery, automotive systems, and precision equipment, these bearing units combine NSK’s advanced bearing technology with a durable housing design to deliver exceptional performance in harsh operating environments.

### **Technical Features & Design Advantages**
The **Square Flanged Units** feature a compact, integrally cast housing with a square flange for secure mounting, ensuring stability and precise alignment in confined spaces. Key technical highlights include:

– **High-Performance Bearings**: Equipped with deep-groove ball bearings manufactured to NSK’s exacting standards, these units offer low friction, high-speed capability, and extended service life.
– **Robust Housing**: The housing is typically made from high-strength cast iron or pressed steel, providing rigidity and resistance to shock loads, vibration, and contamination.
– **Sealing Solutions**: Advanced sealing options (e.g., rubber seals or metal shields) protect against dust, moisture, and debris, enhancing reliability in demanding conditions.
– **Pre-Applied Lubrication**: Factory-lubricated with high-quality grease, reducing maintenance requirements and ensuring smooth operation from installation.
– **Easy Mounting**: The square flange design simplifies alignment and fastening, while the standardized dimensions (e.g., ISO or JIS compliance) ensure interchangeability.

### **Performance Benefits**
NSK’s Square Flanged Bearing Units excel in applications where durability, precision, and efficiency are critical:

– **High Load Capacity**: Optimized internal geometry supports radial and moderate axial loads, making them ideal for conveyor systems, gearboxes, and agricultural machinery.
– **Energy Efficiency**: Low torque and friction reduce power consumption, contributing to sustainable operations.
– **Reduced Downtime**: The sealed, long-life design minimizes wear and contamination-related failures, lowering total cost of ownership.

### **Typical Applications**
These units are widely used across industries, including:
– **Industrial Machinery**: Conveyors, pumps, fans, and material handling systems.
– **Automotive Systems**: Auxiliary drives, tensioners, and transmission components.
– **Precision Equipment**: Packaging machines, printing rollers, and food processing lines.

By integrating **NSK’s Square Flanged Bearing Units**, engineers can achieve reliable, maintenance-free motion control with the assurance of NSK’s global reputation for precision and durability. Whether in high-load industrial settings or precision-critical automation, these units deliver consistent performance under pressure.

For specialized requirements, NSK offers customization options, including material variants, sealing upgrades, and corrosion-resistant coatings—ensuring optimal performance for every application.

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Designations Nominal Dimensions Basic Load Ratings Included products
d
mm
L
mm
J
mm
B,B1,B2
mm
Cr
kN
C0r
kN
Bearing Housing
C-UCFX20D1
100
268
211
117.5
133
105
UCX20D1
FX20D1
CM-UCF321D1
105
310
242
112
184
153
UC321D1
F321D1
CM-UCFX20D1
100
268
211
117.5
133
105
UCX20D1
FX20D1
UCFS321D1
105
310
242
112
184
153
UC321D1
FS321D1
UCF320D1
100
310
242
108
173
141
UC320D1
F320D1
C-UCFS321D1
105
310
242
112
184
153
UC321D1
FS321D1
C-UCF320D1
100
310
242
108
173
141
UC320D1
F320D1
CM-UCFS321D1
105
310
242
112
184
153
UC321D1
FS321D1
CM-UCF320D1
100
310
242
108
173
141
UC320D1
F320D1
UCF322D1
110
340
266
117
205
179
UC322D1
F322D1
CM-UKF320D1
90
310
242
97
173
141
UK320D1
F320D1
UCFS320D1
100
310
242
108
173
141
UC320D1
FS320D1
C-UCF322D1
110
340
266
117
205
179
UC322D1
F322D1
C-UCF217D1
85
220
175
85.7
83.5
64
UC217D1
F217D1
CM-UCFX18D1
90
214
171
104
109
82
UCX18D1
FX18D1
CM-UCF217D1
85
220
175
85.7
83.5
64
UC217D1
F217D1
UCF218D1
90
235
187
96
96
71.5
UC218D1
F218D1
UCF317D1
85
260
204
96
133
97
UC317D1
F317D1
C-UCF218D1
90
235
187
96
96
71.5
UC218D1
F218D1
C-UCF317D1
85
260
204
96
133
97
UC317D1
F317D1