The STEMCO 4.500x6.25x1.0313 M/R NBR Oil Seal is engineered for heavy-duty rotating equipment that requires dependable sealing performance under high load, vibration, and continuous operating conditions.

The M/R Profile uses a reinforced metal case combined with a precision sealing lip designed to retain lubricants and protect internal components from external contaminants. This construction helps prevent grease or oil leakage while reducing the risk of dust, dirt, moisture, and abrasive particles entering the system.

The reinforced metal case provides excellent dimensional stability and secure housing retention, making this seal suitable for heavy machinery, truck and trailer wheel-end systems, industrial gearboxes, and other rotating equipment operating in harsh environments.

Manufactured from premium NBR (Nitrile Butadiene Rubber), the sealing element offers strong resistance to petroleum-based lubricants, gear oils, grease, hydraulic fluids, and general industrial oils. NBR is widely used in heavy-duty oil seals due to its excellent oil resistance, flexibility, abrasion resistance, and cost-effective durability.

With dimensions of 4.500 x 6.25 x 1.0313 inch, this seal is commonly used in heavy-duty trucks, trailers, industrial machinery, agricultural equipment, construction machinery, and OEM equipment utilizing inch-size shaft systems.

⚙️ Applications

• Truck wheel hubs
• Trailer axles
• Heavy-duty gearboxes
• Industrial pumps
• Agricultural machinery
• Construction equipment
• Mining equipment
• Power transmission systems
• Heavy rotating equipment
• OEM machinery

🎯 Benefits

✔ Excellent lubricant retention

✔ Heavy-duty sealing performance

✔ Protects against dust and contaminants

✔ Suitable for high-load applications

✔ Extend bearing and shaft life

✔ Reduce lubricant leakage

✔ Lower maintenance costs

✔ Improve equipment reliability

✔ Long service life

🧠 Technical Insight

• M/R Heavy Duty Seal Design
• Reinforced metal case construction
• Precision sealing lip
• Suitable for oil and grease lubrication
• Excellent dimensional stability
• NBR provides superior oil resistance
• Designed for heavy-duty rotating equipment
• Suitable for truck, trailer, and industrial applications

✅ Key Features

• STEMCO Heavy Duty Quality
• M/R Industrial Seal Design
• Reinforced Metal Case
• Premium NBR Material
• Excellent Oil Resistance
• Heavy Load Capability
• OEM Replacement Ready
• Long Service Life

📊 Specifications

Brand: STEMCO

Model: M/R

Size: 4.500 x 6.25 x 1.0313 inch

Type: Heavy Duty Rotary Shaft Oil Seal

Material: NBR (Nitrile Rubber)

Profile: M/R

Construction: Reinforced Metal Case

Shaft Diameter (ID): 4.500 inch

Housing Diameter (OD): 6.25 inch

Width: 1.0313 inch

Lubrication: Oil & Grease

Application Class: Heavy Duty Industrial / Vehicle Service

Standard: Inch Size Oil Seal

🔁 Equivalent

Suitable replacement for:

• SKF Heavy Duty Oil Seal
• CR Chicago Rawhide Oil Seal
• National Oil Seal
• CFW Rotary Shaft Seal
• Garlock Industrial Seal
• TRELLEBORG Rotary Seal
• NOK Oil Seal
• OEM Heavy Duty Oil Seal

(Always verify dimensions and seal profile before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for truck maintenance, trailer repair, gearbox overhaul, heavy machinery service, and OEM replacement

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification