Radial shaft seals

Seals Product Introduction

**Introduction to SKF Radial Shaft Seals: Engineered for Performance and Reliability**

In demanding industrial environments, effective sealing solutions are critical to protecting rotating shafts from contamination, retaining lubricants, and ensuring long-term equipment reliability. SKF radial shaft seals are precision-engineered components designed to meet these challenges, offering superior performance across a wide range of applications—from heavy-duty industrial machinery to high-speed automotive systems and precision equipment.

### **Technical Features & Design Excellence**
SKF radial shaft seals combine advanced materials, innovative design, and rigorous manufacturing standards to deliver exceptional sealing efficiency. Key features include:

– **Robust Material Options**: SKF seals utilize high-quality elastomers (such as NBR, FKM, and ACM) and reinforced polymers, ensuring compatibility with diverse operating conditions, including extreme temperatures, aggressive chemicals, and high-pressure environments.
– **Optimized Lip Geometry**: The sealing lip is precision-designed to maintain consistent contact with the shaft, minimizing friction while effectively excluding contaminants like dust, water, and abrasive particles.
– **Enhanced Sealing Technologies**: Many SKF seals incorporate auxiliary lips, spring-loaded designs, or hydrodynamic wave patterns to improve sealing performance under dynamic conditions, reducing wear and extending service life.
– **Integrated Metal Casings**: For added durability, SKF seals often feature robust metal casings that provide structural stability and secure fitment in housings, even under vibration or misalignment.

### **Performance Advantages**
SKF radial shaft seals are trusted in critical applications due to their ability to:

– **Extend Bearing & Component Life**: By preventing lubricant leakage and blocking contaminants, SKF seals reduce wear on shafts and bearings, lowering maintenance costs and downtime.
– **Operate in Harsh Conditions**: Whether in high-speed motors, off-road vehicles, or food processing equipment, SKF seals maintain integrity under thermal cycling, chemical exposure, and mechanical stress.
– **Improve Energy Efficiency**: Low-friction designs minimize power loss, contributing to energy savings in pumps, compressors, and electric motors.

### **Typical Applications**
SKF radial shaft seals are widely used in industries where reliability is non-negotiable:

– **Industrial Machinery**: Pumps, gearboxes, conveyors, and electric motors benefit from SKF seals’ ability to handle heavy loads and harsh environments.
– **Automotive Systems**: From wheel hubs to transmission shafts, SKF seals ensure leak-free performance in passenger vehicles, commercial trucks, and off-highway equipment.
– **Precision Equipment**: Medical devices, robotics, and aerospace applications rely on SKF’s high-precision seals for smooth, contamination-free operation.

By integrating cutting-edge materials, intelligent design, and rigorous testing, SKF radial shaft seals set the benchmark for sealing solutions—delivering unmatched durability, efficiency, and protection across industries. Whether for OEMs or maintenance applications, SKF seals help engineers and operators achieve peak performance while reducing total cost of ownership.

For more details on selecting the right seal for your application, explore SKF’s comprehensive portfolio of radial shaft sealing solutions.

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Designation Shaft diameter Housing bore diameter Housing groove width Seal width Limiting speed Sealing lip material Mass
50X75X8 CRWA1 R
50.0 mm
75.0 mm
8.0 mm
3000.0 r/min
Nitrile rubber (NBR)
0.0249 kg
490X540X25 HS8 R
490.0 mm
540.0 mm
25.0 mm
390.0 r/min
Nitrile rubber (NBR)
1.45 kg
490X550X20 HSS8 R
490.0 mm
550.0 mm
20.0 mm
390.0 r/min
Nitrile rubber (NBR)
1.02 kg
4914
12.7 mm
20.83 mm
3.962 mm
2520.0 r/min
Nitrile rubber (NBR)
0.0022 kg
4931
12.7 mm
22.23 mm
6.35 mm
3420.0 r/min
Nitrile rubber (NBR)
0.0023 kg
4938
12.7 mm
22.23 mm
6.35 mm
2520.0 r/min
Nitrile rubber (NBR)
0.0023 kg
4980
12.7 mm
25.37 mm
6.35 mm
13655.0 r/min
Fluoro rubber (FKM)
0.0045 kg
4990
12.7 mm
25.37 mm
6.35 mm
2520.0 r/min
Nitrile rubber (NBR)
0.0045 kg
49951
127.0 mm
155.58 mm
12.7 mm
1747.0 r/min
Nitrile rubber (NBR)
0.163 kg
49985
127.0 mm
158.75 mm
12.7 mm
1740.0 r/min
Nitrile rubber (NBR)
0.123 kg
500X540X16 HSS5 R
500.0 mm
540.0 mm
16.0 mm
497.0 r/min
Nitrile rubber (NBR)
0.55 kg
500X540X20 HDS2 R
500.0 mm
540.0 mm
20.0 mm
573.0 r/min
Nitrile rubber (NBR)
1.56 kg
500X540X20 HMS5 RG
500.0 mm
540.0 mm
20.0 mm
480.0 r/min
Nitrile rubber (NBR)
1.08 kg
500X540X20 HSS5 H
500.0 mm
540.0 mm
20.0 mm
497.0 r/min
Hydrogenated nitrile rubber (HNBR)
0.8 kg
500X550X18 HDS1 R
500.0 mm
550.0 mm
18.0 mm
573.0 r/min
Nitrile rubber (NBR)
1.76 kg
500X550X25 HS8 R
500.0 mm
550.0 mm
25.0 mm
382.0 r/min
Nitrile rubber (NBR)
1.08 kg
500X550X26 HDS2 V
500.0 mm
550.0 mm
26.0 mm
955.0 r/min
Fluoro rubber (FKM)
2.56 kg
50148
127.0 mm
165.1 mm
12.7 mm
1740.0 r/min
Nitrile rubber (NBR)
0.231 kg
50168
127.0 mm
171.45 mm
12.7 mm
1740.0 r/min
Nitrile rubber (NBR)
0.265 kg
50185
127.0 mm
177.8 mm
12.7 mm
1747.0 r/min
Nitrile rubber (NBR)
0.318 kg
504.8X540X20 HDS2 V
504.8 mm
540.0 mm
20.0 mm
946.0 r/min
Fluoro rubber (FKM)
0.6 kg
47586
120.65 mm
158.75 mm
12.7 mm
5580.0 r/min
Fluoro rubber (FKM)
0.225 kg
476X534X20.5 HSS5 R
476.0 mm
534.0 mm
20.5 mm
522.0 r/min
Nitrile rubber (NBR)
0.98 kg
47X62X8 CRW1 R
47.0 mm
62.0 mm
8.0 mm
3060.0 r/min
Nitrile rubber (NBR)
0.0158 kg