The NATIONAL 1.938x2.886x0.500 M/R NBR Oil Seal is designed to provide dependable sealing performance in industrial rotating equipment where lubricant retention and contamination protection are essential for equipment reliability and longevity.

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 sealing force against the shaft while maintaining dimensional stability under vibration, heavy loads, and continuous operation.

The spring-loaded sealing lip maintains constant contact pressure on the shaft surface, helping prevent lubricant leakage while protecting bearings and internal components from dust, dirt, moisture, and other contaminants.

Manufactured from premium NBR (Nitrile Butadiene Rubber), the sealing element offers excellent resistance to hydraulic fluids, gear oils, lubricating oils, grease, and petroleum-based lubricants. NBR remains one of the most widely used sealing materials because of its excellent balance of oil resistance, flexibility, wear resistance, and cost-effective performance.

With dimensions of 1.938 x 2.886 x 0.500 inch, this oil seal is commonly used in industrial pumps, agricultural machinery, industrial gearboxes, compressors, conveyor drives, and imported inch-size machinery.

⚙️ Applications

• Industrial pumps
• Industrial gearboxes
• Agricultural machinery
• Construction equipment
• Compressors
• Conveyor systems
• Hydraulic equipment
• Power transmission systems
• Rotating machinery
• OEM industrial equipment

🎯 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 continuous industrial operation

🧠 Technical Insight

• M/R heavy-duty industrial profile
• Reinforced metal case construction
• Spring-loaded sealing lip maintains constant sealing force
• Excellent dimensional stability
• NBR provides superior oil resistance
• Suitable for oil and grease lubrication systems
• Designed for harsh industrial environments

✅ Key Features

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

📊 Specifications

Brand: NATIONAL

Model: M/R

Size: 1.938 x 2.886 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): 1.938 inch

Housing Diameter (OD): 2.886 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

Federal Mogul Oil 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