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
1263580
320.68 mm
371.48 mm
25.4 mm
893.0 r/min
Nitrile rubber (NBR)
2.21 kg
12655
31.75 mm
65.049 mm
12.7 mm
3609.0 r/min
Nitrile rubber (NBR)
0.0544 kg
12660
31.75 mm
68.91 mm
11.91 mm
3609.0 r/min
Nitrile rubber (NBR)
0.0726 kg
1275240
323.85 mm
361.95 mm
17.48 mm
885.0 r/min
Nitrile rubber (NBR)
2.16 kg
1275250
323.85 mm
361.95 mm
19.05 mm
885.0 r/min
Nitrile rubber (NBR)
2.16 kg
1275257
323.85 mm
361.95 mm
19.05 mm
442.0 r/min
Nitrile rubber (NBR)
1.19 kg
1288322
327.03 mm
368.3 mm
17.48 mm
876.0 r/min
Nitrile rubber (NBR)
2.19 kg
128X160X13 HDS2 V
128.0 mm
160.0 mm
13.0 mm
3730.0 r/min
Fluoro rubber (FKM)
0.22 kg
12X18X3 HM4 R
12.0 mm
18.0 mm
3.0 mm
3240.0 r/min
Nitrile rubber (NBR)
0.0022 kg
120X215X12 HMS5 V
120.0 mm
215.0 mm
12.0 mm
5580.0 r/min
Fluoro rubber (FKM)
0.353 kg
120X215X12 HMSA10 RG
120.0 mm
215.0 mm
12.0 mm
1813.0 r/min
Nitrile rubber (NBR)
0.331 kg
12131
30.963 mm
50.8 mm
11.13 mm
3633.0 r/min
Nitrile rubber (NBR)
0.0294 kg
1225212
311.15 mm
349.25 mm
20.62 mm
1228.0 r/min
Hydrogenated nitrile rubber (HNBR)
1.87 kg
122555
311.15 mm
339.73 mm
15.88 mm
737.0 r/min
Nitrile rubber (NBR)
0.569 kg
1232-1400-48 HSS6 R
317.5 mm
355.6 mm
19.05 mm
602.0 r/min
Nitrile rubber (NBR)
0.64 kg
12340
31.75 mm
44.501 mm
6.35 mm
12091.0 r/min
Fluoro rubber (FKM)
0.009 kg
12350
31.75 mm
42.85 mm
7.95 mm
3600.0 r/min
Nitrile rubber (NBR)
0.0091 kg
12360
31.75 mm
44.45 mm
6.35 mm
3609.0 r/min
Nitrile rubber (NBR)
0.0091 kg
12364
31.75 mm
44.501 mm
6.35 mm
3600.0 r/min
Nitrile rubber (NBR)
0.0091 kg
1238257
314.325 mm
352.43 mm
19.05 mm
456.0 r/min
Nitrile rubber (NBR)
1.16 kg
12386
31.75 mm
47.6 mm
6.35 mm
3600.0 r/min
Nitrile rubber (NBR)
0.0136 kg
12391
31.75 mm
49.225 mm
6.35 mm
3600.0 r/min
Nitrile rubber (NBR)
0.0118 kg
12446
31.75 mm
50.8 mm
6.35 mm
12091.0 r/min
Fluoro rubber (FKM)
0.0136 kg
12456
31.75 mm
50.8 mm
6.35 mm
3600.0 r/min
Nitrile rubber (NBR)
0.0127 kg