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
99840
23.83 mm23.83 mm
63.5 mm
63.5 mm
19.84 mm
Gold
0.113 kg
99841
22.99 mm22.99 mm
64.92 mm
65.0 mm
19.99 mm
Gold
0.0816 kg
99843
23.83 mm23.83 mm
69.72 mm
69.85 mm
19.84 mm
Gold
0.093 kg
99847
23.83 mm23.83 mm
74.6 mm
74.63 mm
19.84 mm
Gold
0.093 kg
99850
18.26 mm18.26 mm
82.55 mm
82.55 mm
15.11 mm
Gold
0.0295 kg
99852
25.4 mm25.4 mm
88.9 mm
88.9 mm
20.65 mm
Gold
0.145 kg
99859
25.4 mm25.4 mm
139.65 mm
139.7 mm
20.65 mm
Gold
0.302 kg
99875
26.01 mm26.01 mm
74.93 mm
75.01 mm
22.0 mm
Gold
0.0299 kg
99821
17.48 mm17.48 mm
36.37 mm
36.53 mm
14.3 mm
Gold
0.0363 kg
99822
17.48 mm17.48 mm
38.02 mm
38.1 mm
14.3 mm
Gold
0.272 kg
99838
11.13 mm11.13 mm
57.12 mm
57.15 mm
7.95 mm
Gold
0.0431 kg
99839
23.83 mm23.83 mm
60.3 mm
60.33 mm
19.84 mm
Gold
0.0748 kg
99492
32.0 mm32.0 mm
124.89 mm
124.99 mm
26.01 mm
Standard
0.246 kg
99494
23.83 mm23.83 mm
129.79 mm
129.9 mm
19.05 mm
Standard
0.265 kg
99498
22.23 mm22.23 mm
126.95 mm
127.0 mm
17.48 mm
Standard
0.237 kg
99499
25.4 mm25.4 mm
126.95 mm
127.0 mm
20.65 mm
Standard
0.24 kg
99549
25.4 mm25.4 mm
139.65 mm
139.7 mm
20.65 mm
Standard
0.293 kg
99562
19.05 mm19.05 mm
145.44 mm
145.64 mm
14.3 mm
Standard
0.347 kg
99571
22.23 mm22.23 mm
144.75 mm
145.01 mm
19.05 mm
Standard
0.348 kg
99575
25.4 mm25.4 mm
145.95 mm
146.05 mm
20.65 mm
Standard
0.408 kg