The NATIONAL Oil Seal 3.250x4.504x0.469 SYN NBR is engineered for industrial applications requiring dependable lubricant retention and protection against dust, moisture, and external contaminants.

Designed as a radial shaft oil seal, this seal forms a dynamic sealing interface between rotating shafts and stationary housings. The sealing lip maintains consistent contact with the shaft surface while preventing oil leakage and reducing contamination ingress. Modern oil seals utilize spring-loaded sealing technology to compensate for wear and maintain sealing effectiveness throughout service life.

The seal is manufactured from Synthetic NBR (Nitrile Butadiene Rubber), one of the most widely used elastomers in industrial sealing applications. NBR offers excellent resistance to lubricating oils, grease, hydraulic fluids, and petroleum-based products while maintaining flexibility and wear resistance under continuous operation.

With dimensions of 3.250 x 4.504 x 0.469 inch, this seal is commonly installed in industrial gearboxes, speed reducers, pumps, agricultural equipment, mining machinery, conveyors, and heavy rotating equipment where dependable sealing performance is essential.

⚙️ Applications

• Industrial gearbox
• Speed reducer
• Electric motors
• Hydraulic pumps
• Agricultural machinery
• Mining equipment
• Conveyor systems
• Industrial fans
• Material handling equipment
• Imported inch-size machinery

🎯 Benefits

✔ Excellent oil retention

✔ Protect against dust and contamination

✔ Extend bearing and shaft life

✔ Reduce lubricant leakage

✔ Lower maintenance costs

✔ Improve equipment reliability

✔ Suitable for continuous industrial operation

🧠 Technical Insight

• Synthetic NBR provides excellent oil resistance
• Spring-loaded sealing lip maintains sealing pressure
• Suitable for oil and grease lubrication systems
• Designed for rotating shaft applications
• Excellent wear resistance under industrial operation
• Compatible with a wide range of industrial equipment

✅ Key Features

• Premium Synthetic NBR Material
• Rotary Shaft Seal Design
• Industrial Grade Construction
• Excellent Oil Resistance
• Reliable Contamination Protection
• OEM Replacement Ready

📊 Specifications

Brand: NATIONAL

Model: SYN

Size: 3.250 x 4.504 x 0.469 inch

Type: Rotary Shaft Oil Seal

Material: Synthetic NBR (Nitrile Rubber)

Construction: Metal Reinforced Oil Seal

Shaft Diameter (ID): 3.250 inch

Housing Diameter (OD): 4.504 inch

Width: 0.469 inch

Application Class: Industrial Service

🔁 Equivalent

Suitable replacement for:

SKF Oil Seal

CR Oil Seal

NOK Oil Seal

CFW Oil Seal

KACO Oil Seal

Timken National Seal

Chicago Rawhide 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