Rod and buffer seals

Seals Product Introduction

**Introduction to SKF Hydraulic Seals: Rod and Buffer Seals for Demanding Industrial Applications**

In hydraulic systems, maintaining optimal performance and reliability depends on the integrity of sealing solutions. SKF, a global leader in precision engineering, offers a comprehensive range of **hydraulic seals**, including specialized **rod seals** and **buffer seals**, designed to withstand extreme pressures, dynamic motion, and harsh operating conditions. These seals play a critical role in preventing fluid leakage, minimizing friction, and extending the service life of hydraulic cylinders and other industrial machinery.

### **Technical Features and Design Excellence**
SKF hydraulic rod and buffer seals are engineered with advanced materials and innovative geometries to deliver superior sealing performance. Key features include:

– **High-Pressure Resistance**: Constructed from durable polyurethane (PU) or thermoplastic materials, SKF rod seals are optimized to handle high-pressure cycles (up to 40 MPa or more) without extrusion or premature wear.
– **Low Friction and Energy Efficiency**: Precision-machined sealing lips reduce friction, ensuring smooth rod movement and improving energy efficiency in hydraulic systems.
– **Enhanced Contamination Resistance**: Integrated wiper designs in buffer seals prevent dirt, moisture, and particulate ingress, protecting critical hydraulic components from damage.
– **Temperature and Chemical Compatibility**: SKF seals perform reliably across a wide temperature range (-30°C to +110°C) and resist degradation from hydraulic fluids, oils, and aggressive media.

### **Performance Advantages for Industrial Applications**
SKF hydraulic seals are trusted in industries where reliability and durability are non-negotiable. Their benefits include:

– **Extended Service Life**: Reduced wear and tear due to optimized material compounds and dynamic sealing profiles.
– **Leakage Prevention**: Tight sealing action maintains system pressure, reducing downtime and maintenance costs.
– **Shock Absorption (Buffer Seals)**: In high-pressure applications, buffer seals act as secondary protection, absorbing pressure spikes and preventing primary seal failure.

### **Typical Applications**
SKF rod and buffer seals are widely used in:

– **Industrial Machinery**: Hydraulic presses, injection molding machines, and construction equipment (e.g., excavators, loaders).
– **Automotive Systems**: Suspension cylinders, braking systems, and heavy-duty truck hydraulics.
– **Precision Equipment**: Aerospace actuators, marine hydraulic systems, and robotic automation.

By combining cutting-edge materials, rigorous testing, and application-specific designs, SKF hydraulic seals ensure **long-term reliability**, **efficiency**, and **cost savings** for demanding industrial environments. Whether in mobile hydraulics or stationary machinery, SKF’s sealing solutions help operators achieve peak performance while minimizing environmental impact through reduced fluid leakage.

For engineers and maintenance professionals seeking high-performance sealing solutions, SKF’s rod and buffer seals represent a proven choice for enhancing hydraulic system longevity and operational efficiency.

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Designation Rod diameter Housing groove diameter Housing groove width Primary sealing element Mass
SIL 65X75X13
65.0 mm
75.0 mm
13.0 mm
B93
0.013 kg
SIL 80X90X13
80.0 mm
90.0 mm
13.0 mm
B93
0.0165 kg
SIL 80X90X7
80.0 mm
90.0 mm
7.0 mm
B93
0.087 kg
SIL 85X100X12.5
85.0 mm
100.0 mm
12.5 mm
B93
0.0254 kg
SIL 85X105X13
85.0 mm
105.0 mm
13.0 mm
B93
0.0362 kg
STD125-1000-125-J1S
25.4 mm
31.75 mm
3.49 mm
Polyurethane (TPU U-1003)
0.001 kg
STD125-125-125-J1S
3.18 mm
9.53 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0002 kg
STD125-1375-125-J1S
34.93 mm
41.28 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0013 kg
STD125-2250-125-J1S
57.15 mm
63.5 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0114 kg
STD125-3500-125-J1S
88.9 mm
95.25 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0033 kg
STD125-3750-125-J1S
95.25 mm
101.6 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0035 kg
STD125-4000-125-J1S
101.6 mm
107.95 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0038 kg
S9B-63X78.1X6.3-AD1
63.0 mm
78.1 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0178 kg
SIL 100X115X10
100.0 mm
115.0 mm
10.0 mm
B93
0.04 kg
SIL 105X115X11
105.0 mm
115.0 mm
11.0 mm
B93
0.0177 kg
SIL 10X18X6.3
10.0 mm
18.0 mm
6.3 mm
B93
0.0012 kg
SIL 115X125X15
115.0 mm
125.0 mm
15.0 mm
B93
0.0261 kg
SIL 12X20X6.3
12.0 mm
20.0 mm
6.3 mm
B93
0.0011 kg
SIL 140X150X12.5
140.0 mm
150.0 mm
12.5 mm
B93
0.0265 kg
SIL 18X24X5.2
18.0 mm
24.0 mm
5.2 mm
B93
0.0012 kg
SIL 205X220X13.5
205.0 mm
220.0 mm
13.5 mm
B93
0.061 kg
SIL 20X30X9
20.0 mm
30.0 mm
9.0 mm
B93
0.003 kg
SIL 22X32X8
22.0 mm
32.0 mm
8.0 mm
B93
0.1 kg
SIL 25X33X11
25.0 mm
33.0 mm
11.0 mm
B93
0.0041 kg