Wear sleeves

Seals Product Introduction

**Introduction to SKF Shaft Seals and Wear Sleeves: Engineered for Durability and Performance**

In demanding industrial environments, the integrity of rotating equipment hinges on the reliability of its sealing solutions. SKF, a global leader in bearing and sealing technology, offers a comprehensive range of **shaft seals and wear sleeves** designed to extend equipment life, minimize maintenance, and optimize performance under harsh operating conditions. These precision-engineered components are critical for preventing contamination, retaining lubricants, and protecting shafts from wear—ensuring smooth operation in applications ranging from heavy machinery to automotive systems and precision equipment.

### **Technical Features and Innovation**
SKF shaft seals are crafted from advanced materials such as **nitrile rubber (NBR), fluoroelastomers (FKM), and polyacrylate (ACM)**, selected for their resistance to heat, chemicals, and abrasion. The seals incorporate robust sealing lips with **spring-loaded designs** to maintain consistent contact pressure against the shaft, even under dynamic misalignment or vibration. For added protection, SKF wear sleeves—often made from **hardened stainless steel or coated carbon steel**—act as sacrificial layers, shielding shafts from damage caused by friction or seal lip wear. These sleeves are precision-ground to ensure a smooth surface finish, reducing friction and improving seal longevity.

Key innovations include:
– **Low-friction designs** to reduce energy consumption and heat generation.
– **Integrated sealing solutions** that combine multiple functions (e.g., dust lips, exclusion barriers) for comprehensive protection.
– **Easy-to-install configurations**, including unitized seals with pre-assembled wear sleeves for simplified maintenance.

### **Performance Advantages**
SKF seals and wear sleeves deliver measurable benefits in industrial applications:
– **Extended service life**: Reduced wear on shafts and seals lowers downtime and replacement costs.
– **Superior contamination exclusion**: Effective barriers against dirt, moisture, and particulate ingress.
– **High-speed compatibility**: Engineered to maintain sealing integrity even at elevated rotational speeds.
– **Temperature resilience**: Performance stability across a wide range, from -40°C to +200°C, depending on material selection.

### **Typical Applications**
SKF shaft seals and wear sleeves are deployed across industries where reliability is non-negotiable:
– **Industrial Machinery**: Pumps, compressors, and gearboxes in mining, oil & gas, and power generation.
– **Automotive Systems**: Wheel hubs, transmissions, and engine components requiring long-term seal performance.
– **Precision Equipment**: Robotics, medical devices, and aerospace systems where minimal friction and contamination control are critical.

By combining cutting-edge materials, precision engineering, and decades of field expertise, SKF sealing solutions ensure optimal equipment performance—even in the most challenging environments. Whether for retrofitting aging machinery or designing new systems, SKF seals and wear sleeves provide a proven defense against wear, leakage, and premature failure.

For industries prioritizing efficiency and reliability, SKF’s sealing technologies represent a smart investment in long-term operational success.

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Designation Width Shaft diameter, minimum Shaft diameter Seal seat width Type Mass
99855
25.4 mm25.4 mm
101.55 mm
101.6 mm
20.65 mm
Gold
0.179 kg
99473
24.99 mm24.99 mm
119.89 mm
119.99 mm
19.99 mm
Standard
0.213 kg
99856
25.4 mm25.4 mm
114.2 mm
114.3 mm
20.65 mm
Gold
0.204 kg
99490
14.0 mm14.0 mm
124.89 mm
124.99 mm
10.01 mm
Standard
0.231 kg
99860
11.13 mm11.13 mm
23.06 mm
23.11 mm
7.95 mm
Gold
0.024 kg
99552
25.4 mm25.4 mm
139.9 mm
140.0 mm
20.5 mm
Standard
0.292 kg
99862
31.75 mm31.75 mm
149.12 mm
149.23 mm
25.4 mm
Gold
0.32 kg
99606
30.0 mm30.0 mm
154.74 mm
154.86 mm
26.01 mm
Standard
0.325 kg
99721
38.0 mm38.0 mm
179.76 mm
180.01 mm
32.99 mm
Standard
0.5 kg
99813
11.0 mm11.0 mm
24.94 mm
24.99 mm
7.95 mm
Gold
0.0227 kg
99815
11.13 mm11.13 mm
26.92 mm
27.0 mm
7.95 mm
Gold
0.0499 kg
99820
16.0 mm16.0 mm
34.93 mm
34.93 mm
13.0 mm
Gold
0.0318 kg
99401
15.88 mm15.88 mm
101.55 mm
101.6 mm
12.7 mm
Standard
0.194 kg
99409
24.0 mm24.0 mm
103.89 mm
103.99 mm
19.99 mm
Standard
0.182 kg
99423
23.01 mm23.01 mm
107.34 mm
107.54 mm
19.84 mm
Standard
0.218 kg
99290
16.28 mm16.28 mm
74.6 mm
74.63 mm
12.7 mm
Standard
0.088 kg
99424
25.4 mm25.4 mm
107.9 mm
107.95 mm
20.65 mm
Standard
0.191 kg
99296
23.83 mm23.83 mm
76.12 mm
76.2 mm
20.65 mm
Standard
0.0948 kg
99434
14.96 mm14.96 mm
109.78 mm
110.01 mm
11.38 mm
Standard
0.192 kg
99299
25.4 mm25.4 mm
75.95 mm
76.02 mm
20.65 mm
Standard
0.0971 kg