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
SD 25X32X4
25.0 mm
32.0 mm
4.0 mm
7639.0 r/min
Polyurethane (AU)
0.00222 kg
55X72X8 HMS5 RG3
55.0 mm
72.0 mm
8.0 mm
2880.0 r/min
Nitrile rubber (NBR)
0.02 kg
SD 30X40X4
30.0 mm
40.0 mm
4.0 mm
6366.0 r/min
Polyurethane (AU)
0.00327 kg
SD 38X48X4
38.0 mm
48.0 mm
4.0 mm
5026.0 r/min
Polyurethane (AU)
0.0044 kg
SD 50X58X4
50.0 mm
58.0 mm
4.0 mm
3820.0 r/min
Polyurethane (AU)
0.0024 kg
1105X1151X18 HS8 R
1105.0 mm
1151.0 mm
17.5 mm
173.0 r/min
Nitrile rubber (NBR)
1.53 kg
1258283
317.5 mm
355.6 mm
25.4 mm
1504.0 r/min
Fluoro rubber (FKM)
1.23 kg
1400780
355.6 mm
419.1 mm
25.4 mm
806.0 r/min
Nitrile rubber (NBR)
2.54 kg
170X200X15 HFS R
170.0 mm
200.0 mm
15.0 mm
1685.2 r/min
Nitrile rubber (NBR)
0.158 kg
4775850
1212.85 mm
1282.7 mm
31.75 mm
236.0 r/min
Nitrile rubber (NBR)
9.59 kg
1650770
419.1 mm
482.6 mm
19.05 mm
684.0 r/min
Nitrile rubber (NBR)
2.06 kg
495X560X25 HDS2 R
495.0 mm
560.0 mm
25.0 mm
579.0 r/min
Nitrile rubber (NBR)
3.23 kg
1700680
431.8 mm
488.95 mm
25.4 mm
25.4 mm
663.0 r/min
Nitrile rubber (NBR)
3.08 kg
600X660X25 HDS1 R
600.0 mm
660.0 mm
25.0 mm
477.0 r/min
Nitrile rubber (NBR)
3.53 kg
2225660
565.15 mm
622.3 mm
22.23 mm
507.0 r/min
Nitrile rubber (NBR)
4.24 kg
660X720X22 HDS1 R
660.0 mm
720.0 mm
22.0 mm
434.0 r/min
Nitrile rubber (NBR)
3.4 kg
25X35X7 HMSA10 RG3
25.0 mm
35.0 mm
7.0 mm
3840.0 r/min
Nitrile Rubber (NBR)
0.0059 kg
735X799X25 HDS1 R
735.0 mm
799.0 mm
25.0 mm
390.0 r/min
Nitrile rubber (NBR)
4.58 kg
280X340X28 HDS2 R
280.0 mm
340.0 mm
28.0 mm
1023.0 r/min
Nitrile rubber (NBR)
1.96 kg
28X62X12 CRSH1 R
28.0 mm
62.0 mm
12.0 mm
3720.0 r/min
Nitrile rubber (NBR)
0.0657 kg