The TROSTEL 4.750x6.313x1.250 M/R NBR Oil Seal is engineered for heavy-duty industrial applications where equipment reliability and sealing performance are critical to operational continuity.

The M/R profile is a rugged metal-case rotary shaft seal configuration designed to provide stable housing retention and excellent sealing efficiency. The spring-loaded sealing lip continuously maintains radial contact pressure against the shaft surface, helping retain lubricants while preventing contaminants from entering the equipment. Heavy-duty metal case seals are widely used in industrial gearboxes, pumps, mining machinery, and rotating equipment requiring long service life.

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

With dimensions of 4.750 x 6.313 x 1.250 inch, this seal is commonly installed in heavy-duty gearboxes, industrial pumps, conveyor drives, mining equipment, agricultural machinery, and imported inch-size industrial equipment.

⚙️ Applications

• Industrial gearbox
• Heavy-duty pumps
• Mining machinery
• Agricultural equipment
• Steel mill machinery
• Paper mill equipment
• Conveyor systems
• Power transmission systems
• Industrial rotating equipment
• OEM machinery

🎯 Benefits

✔ Excellent oil retention

✔ Heavy-duty industrial construction

✔ Reliable shaft sealing performance

✔ Extend bearing and shaft life

✔ Reduce lubricant leakage

✔ Lower maintenance costs

✔ Improve equipment reliability

✔ Suitable for harsh operating environments

🧠 Technical Insight

• M/R heavy-duty metal case construction
• Spring-loaded sealing lip maintains constant sealing force
• Excellent lubricant retention capability
• Suitable for oil and grease lubrication systems
• NBR provides outstanding oil resistance
• Commonly used in heavy industrial rotating equipment
• Designed for continuous-duty applications

✅ Key Features

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

📊 Specifications

Brand: TROSTEL

Model: M/R

Size: 4.750 x 6.313 x 1.250 inch

Type: Heavy Duty Rotary Shaft Oil Seal

Material: NBR (Nitrile Rubber)

Construction: Metal Case Oil Seal

Spring Type: Garter Spring

Shaft Diameter (ID): 4.750 inch

Housing Diameter (OD): 6.313 inch

Width: 1.250 inch

Application Class: Heavy Industrial Service

🔁 Equivalent

Suitable replacement for:

SKF Industrial Oil Seal

CR Chicago Rawhide Seal

NOK Industrial Seal

CFW Rotary Shaft Seal

KACO Oil Seal

DICHTOMATIK Industrial 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