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
ZBR-80X95X12.4-E6W
80.0 mm
95.0 mm
12.4 mm
Polyurethane (TPU U-1029)
0.0305 kg
ZBR-85X100X10-E6W
85.0 mm
100.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0251 kg
ZBR187-1250-312-E6W
31.75 mm
41.25 mm
8.72 mm
Polyurethane (TPU U-1029)
0.0047 kg
ZBR250-2250-375-E6W
57.15 mm
69.85 mm
10.48 mm
Polyurethane (TPU U-1029)
0.0131 kg
ZBR250-2500-375-E6W
63.5 mm
76.2 mm
10.48 mm
Polyurethane (TPU U-1029)
0.0144 kg
ZBR250-3000-375-E6W
76.2 mm
88.9 mm
10.48 mm
Polyurethane (TPU U-1029)
0.0171 kg
ZBR250-3250-375-E6W
82.55 mm
95.25 mm
10.48 mm
Polyurethane (TPU U-1029)
0.0193 kg
ZBR250-3500-375-E6W
88.9 mm
101.6 mm
10.48 mm
Polyurethane (TPU U-1029)
0.021 kg
STD375-7250-375-J1S
184.15 mm
203.2 mm
10.48 mm
Polyurethane (TPU U-1003)
0.0654 kg
STD375-750-375-J1S
19.05 mm
38.1 mm
10.48 mm
Polyurethane (TPU U-1003)
0.0317 kg
STD500-1750-500-J1S
44.45 mm
69.85 mm
13.97 mm
Polyurethane (TPU U-1003)
0.0337 kg
STD500-19000-500-J1S
482.6 mm
508.0 mm
13.97 mm
Polyurethane (TPU U-1003)
0.292 kg
STD500-3500-500-J1S
88.9 mm
114.3 mm
13.97 mm
Polyurethane (TPU U-1003)
0.06 kg
STD500-41000-500-J1S
1041.4 mm
1066.8 mm
13.97 mm
Polyurethane (TPU U-1003)
0.622 kg
STD500-4250-500-J1S
107.95 mm
133.35 mm
13.97 mm
Polyurethane (TPU U-1003)
0.0712 kg
STD500-6250-500-J1S
158.75 mm
184.15 mm
13.97 mm
Polyurethane (TPU U-1003)
0.101 kg
STD500-9000-500-J1S
228.6 mm
254.0 mm
13.97 mm
Polyurethane (TPU U-1003)
0.142 kg
STD625-8000-625-J1S
203.2 mm
234.95 mm
17.46 mm
Polyurethane (TPU U-1003)
0.199 kg
STD625-9750-625-J1S
247.65 mm
279.4 mm
17.46 mm
Polyurethane (TPU U-1003)
0.239 kg
ZBR-100X115X11-E6W
100.0 mm
115.0 mm
11.0 mm
Polyurethane (TPU U-1029)
0.032 kg
ZBR-100X120X15.5-E6W
100.0 mm
120.0 mm
15.5 mm
Polyurethane (TPU U-1029)
0.0637 kg
ZBR-110X125X10-E6W
110.0 mm
125.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0276 kg
ZBR-110X125X11-E6W
110.0 mm
125.0 mm
11.0 mm
Polyurethane (TPU U-1029)
0.0324 kg
ZBR-120X140X13-E6W
120.0 mm
140.0 mm
13.0 mm
Polyurethane (TPU U-1029)
0.0542 kg