The AEROQUIP 4.375x5.125x0.500 M/R NBR Oil Seal is designed for industrial applications requiring dependable sealing performance, lubricant retention, and protection against external contaminants.

The M/R Profile utilizes a reinforced metal outer case combined with a precision-engineered sealing lip and garter spring. This design ensures consistent radial pressure against the shaft while maintaining excellent dimensional stability under vibration, temperature fluctuations, and heavy operating loads.

The heavy-duty construction makes this seal suitable for hydraulic systems, industrial pumps, gearboxes, agricultural machinery, compressors, and power transmission equipment. The seal effectively prevents lubricant leakage while protecting internal components from dust, dirt, moisture, and environmental contaminants.

Manufactured from premium NBR (Nitrile Butadiene Rubber), the sealing element provides excellent resistance to lubricating oils, hydraulic fluids, gear oils, grease, and petroleum-based lubricants. NBR is widely recognized for its durability, flexibility, wear resistance, and cost-effective performance in industrial sealing applications.

With dimensions of 4.375 x 5.125 x 0.500 inch, this seal is commonly found in imported hydraulic equipment, industrial machinery, agricultural equipment, and heavy-duty rotating systems.

⚙️ Applications

• Hydraulic pumps
• Hydraulic motors
• Industrial gearboxes
• Agricultural machinery
• Construction equipment
• Industrial compressors
• Power transmission systems
• Conveyor drives
• Heavy-duty rotating equipment
• OEM machinery

🎯 Benefits

✔ Excellent oil retention

✔ Heavy-duty sealing performance

✔ Superior contamination protection

✔ Extend bearing and shaft life

✔ Reduce lubricant leakage

✔ Lower maintenance costs

✔ Improve equipment reliability

✔ Suitable for harsh industrial environments

🧠 Technical Insight

• M/R heavy-duty metal case design
• Spring-loaded sealing lip maintains consistent sealing pressure
• Excellent dimensional stability
• Suitable for oil and grease lubrication systems
• NBR provides superior oil resistance
• Designed for continuous-duty industrial operation
• Commonly used in hydraulic and power transmission equipment

✅ Key Features

• AEROQUIP Industrial Quality
• M/R Heavy Duty Design
• Reinforced Metal Case
• Spring Loaded Sealing Lip
• Premium NBR Material
• OEM Replacement Ready

📊 Specifications

Brand: AEROQUIP

Model: M/R

Size: 4.375 x 5.125 x 0.500 inch

Type: Heavy Duty Rotary Shaft Oil Seal

Material: NBR (Nitrile Rubber)

Construction: Reinforced Metal Case

Spring Type: Garter Spring

Shaft Diameter (ID): 4.375 inch

Housing Diameter (OD): 5.125 inch

Width: 0.500 inch

Application Class: Heavy Industrial Service

🔁 Equivalent

Suitable replacement for:

SKF Industrial Oil Seal

NOK Industrial Oil Seal

CR Chicago Rawhide Seal

CFW Rotary Shaft Seal

KACO Oil Seal

DICHTOMATIK Oil Seal

TRELLEBORG Industrial Seal

(Always verify dimensions and seal profile before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

📦 MOQ: 1 Piece

📲 Contact via LINE ID: dusitrea

🏭 Suitable for industrial maintenance and OEM replacement