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
UKFS328D1
125
450
350
131
253
246
UK328D1
FS328D1
UKF326D1
115
410
320
121
229
214
UK326D1
F326D1
C-UKFS328D1
125
450
350
131
253
246
UK328D1
FS328D1
C-UKF326D1
115
410
320
121
229
214
UK326D1
F326D1
CM-UKFS328D1
125
450
350
131
253
246
UK328D1
FS328D1
CM-UKF326D1
115
410
320
121
229
214
UK326D1
F326D1
UCF326D1
130
410
320
135
229
214
UC326D1
F326D1
UKFS326D1
115
410
320
121
229
214
UK326D1
FS326D1
C-UCF326D1
130
410
320
135
229
214
UC326D1
F326D1
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
UKFS320D1
90
310
242
97
173
141
UK320D1
FS320D1
C-UCFS320D1
100
310
242
108
173
141
UC320D1
FS320D1
CM-UCF322D1
110
340
266
117
205
179
UC322D1
F322D1
C-UKFS320D1
90
310
242
97
173
141
UK320D1
FS320D1
CM-UCFS320D1
100
310
242
108
173
141
UC320D1
FS320D1
UCFS322D1
110
340
266
117
205
179
UC322D1
FS322D1
CM-UKFS320D1
90
310
242
97
173
141
UK320D1
FS320D1
UKF322D1
100
340
266
105
205
179
UK322D1
F322D1
C-UCFS322D1
110
340
266
117
205
179
UC322D1
FS322D1
UCF319D1
95
290
228
103
153
119
UC319D1
F319D1