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-UCFS307D1
35
135
100
48
33.5
19.1
UC307D1
FS307D1
CM-UCFS307D1
35
135
100
48
33.5
19.1
UC307D1
FS307D1
UKFX08D1
35
137
105
46
32.5
20.4
UKX08D1
FX08D1
C-UKFX08D1
35
137
105
46
32.5
20.4
UKX08D1
FX08D1
CM-UKFX08D1
35
137
105
46
32.5
20.4
UKX08D1
FX08D1
UKF308D1
35
150
112
46
40.5
24
UK308D1
F308D1
C-UKF308D1
35
150
112
46
40.5
24
UK308D1
F308D1
CM-UKF308D1
35
150
112
46
40.5
24
UK308D1
F308D1
UKFS308D1
35
150
112
46
40.5
24
UK308D1
FS308D1
UELFU205D1
25
96
70
44.4
14
7.85
UEL205D1
FU205D1
UKF206D1
25
108
83
38
19.5
11.3
UK206D1
F206D1
Z-UKF206D1
25
108
83
38
19.5
11.3
UK206D1
F206D1
ZM-UKF206D1
25
108
83
38
19.5
11.3
UK206D1
F206D1
C-UKF206D1
25
108
83
38
19.5
11.3
UK206D1
F206D1
CM-UKF206D1
25
108
83
38
19.5
11.3
UK206D1
F206D1
UCFX05D1
25
108
83
38.1
19.5
11.3
UCX05D1
FX05D1
C-UCFX05D1
25
108
83
38.1
19.5
11.3
UCX05D1
FX05D1
CM-UCFX05D1
25
108
83
38.1
19.5
11.3
UCX05D1
FX05D1
UCF305D1
25
110
80
38
21.2
10.9
UC305D1
F305D1
C-UCF305D1
25
110
80
38
21.2
10.9
UC305D1
F305D1
CM-UCF305D1
25
110
80
38
21.2
10.9
UC305D1
F305D1
UCFS305D1
25
110
80
38
21.2
10.9
UC305D1
FS305D1
C-UCFS305D1
25
110
80
38
21.2
10.9
UC305D1
FS305D1
CM-UCFS305D1
25
110
80
38
21.2
10.9
UC305D1
FS305D1