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
STD250-1375-250-J1S
34.93 mm
47.63 mm
6.99 mm
Polyurethane (TPU U-1003)
0.0061 kg
STD250-18375-250-J1S
466.73 mm
479.43 mm
6.99 mm
Polyurethane (TPU U-1003)
0.07 kg
STD250-2750-250-J1S
69.85 mm
82.55 mm
6.99 mm
Polyurethane (TPU U-1003)
0.0112 kg
STD250-3000-250-J1S
76.2 mm
88.9 mm
6.99 mm
Polyurethane (TPU U-1003)
0.0121 kg
SIL 105X125X13
105.0 mm
125.0 mm
13.0 mm
B93
0.0435 kg
SIL 120X135X16
120.0 mm
135.0 mm
16.0 mm
B93
0.09 kg
SIL 120X140X16
120.0 mm
140.0 mm
16.0 mm
B93
0.0622 kg
SIL 12X22X8
12.0 mm
22.0 mm
8.0 mm
B93
0.002 kg
SIL 140X160X16
140.0 mm
160.0 mm
16.0 mm
B93
0.069 kg
SIL 150X170X16
150.0 mm
170.0 mm
16.0 mm
B93
0.0075 kg
SIL 20X28X6.3
20.0 mm
28.0 mm
6.3 mm
B93
0.0018 kg
SIL 35X45X11
35.0 mm
45.0 mm
11.0 mm
B93
0.0065 kg
SIL 40X55X12.5
40.0 mm
55.0 mm
12.5 mm
B93
0.0132 kg
SIL 40X60X13
40.0 mm
60.0 mm
13.0 mm
B93
0.1 kg
SIL 50X60X7
50.0 mm
60.0 mm
7.0 mm
B93
0.0056 kg
SIL 55X65X11
55.0 mm
65.0 mm
11.0 mm
B93
0.0101 kg
SIL 60X70X7
60.0 mm
70.0 mm
7.0 mm
B93
0.0062 kg
SIL 60X75X11
60.0 mm
75.0 mm
11.0 mm
B93
0.016 kg
SIL 63X83X14.5
63.0 mm
83.0 mm
14.5 mm
B93
0.0284 kg
SIL 65X75X7
65.0 mm
75.0 mm
7.0 mm
B93
0.0067 kg
SIL 65X85X13
65.0 mm
85.0 mm
13.0 mm
B93
0.05 kg
SIL 70X80X7
70.0 mm
80.0 mm
7.0 mm
B93
0.0778 kg
SIL 70X80X9
70.0 mm
80.0 mm
9.0 mm
B93
0.0091 kg
SIL 70X90X13
70.0 mm
90.0 mm
13.0 mm
B93
0.028 kg