The NATIONAL 2.125x3.155x0.500 M/F FABRIC Oil Seal is specifically designed for heavy-duty rotary shaft applications where conventional rubber oil seals may not provide sufficient mechanical strength or service life. It is commonly used in industrial gearboxes, pumps, mining equipment, rolling mills, agricultural machinery, paper mills, heavy construction equipment, and OEM industrial machinery.

The M/F Profile utilizes a reinforced steel outer case combined with a fabric-reinforced sealing element. The industrial fabric reinforcement significantly improves tensile strength, abrasion resistance, dimensional stability, and sealing durability under severe operating conditions.

Unlike conventional elastomer-only seals, the fabric-reinforced construction withstands shaft movement, heavy loads, vibration, and continuous industrial operation while maintaining excellent lubricant retention and shaft protection.

Manufactured using NBR (Nitrile Butadiene Rubber) bonded with industrial reinforcing fabric, the seal offers excellent resistance to:

• Mineral oils
• Hydraulic oils
• Gear oils
• Lubricating grease
• Petroleum-based lubricants

The NBR compound provides excellent oil resistance while the fabric reinforcement enhances structural integrity, making this seal ideal for heavy industrial service.

With dimensions of 2.125 × 3.155 × 0.500 inch, this seal is widely installed in industrial gearboxes, heavy-duty pumps, mining equipment, steel processing machinery, conveyor systems, agricultural equipment, construction machinery, and OEM rotating equipment utilizing inch-size shaft systems.

⚙️ Applications

• Industrial gearboxes
• Heavy-duty pumps
• Mining equipment
• Steel mills
• Agricultural machinery
• Construction equipment
• Paper mills
• Conveyor systems
• Power transmission equipment
• OEM machinery

🎯 Benefits

✔ Heavy-duty fabric reinforced construction

✔ Excellent oil retention

✔ Outstanding wear resistance

✔ High mechanical strength

✔ Excellent abrasion resistance

✔ Protects bearings and shafts

✔ Long service life

✔ OEM quality replacement

✔ Reduced maintenance costs

🧠 Technical Insight

• M/F Fabric Reinforced Profile
• Reinforced Steel Case
• Industrial Fabric Reinforcement
• Premium NBR Material
• Excellent Oil Resistance
• Heavy Duty Construction
• Oil & Grease Compatible
• Reliable Rotary Shaft Sealing

✅ Key Features

• NATIONAL Premium Quality
• M/F Profile
• Fabric Reinforced Construction
• Reinforced Steel Case
• Premium NBR Material
• Heavy Duty Performance
• OEM Replacement Ready
• Long Service Life

📊 Specifications

Brand: NATIONAL

Model: M/F

Size: 2.125 × 3.155 × 0.500 inch

Type: Fabric Reinforced Rotary Shaft Oil Seal

Material: NBR with Reinforced Fabric

Profile: M/F

Construction: Reinforced Metal Case

Lip Design: Fabric Reinforced Sealing Lip

Dust Lip: None

Spring Type: None (Fabric Reinforced Design)

Shaft Diameter (ID): 2.125 inch

Housing Diameter (OD): 3.155 inch

Width: 0.500 inch

Pressure Capability: Up to 0.5 Bar

Lubrication: Oil & Grease

Temperature Range: -40°C to +100°C

Application Class: Heavy Industrial Service

Standard: Inch Size Oil Seal

🔁 Equivalent

Suitable replacement for:

• SKF Fabric Oil Seal
• CR Chicago Rawhide Fabric Seal
• Freudenberg Fabric Oil Seal
• Simrit Oil Seal
• Garlock Fabric Seal
• KACO Oil Seal
• CFW Rotary Shaft Seal
• DICHTOMATIK Fabric Seal
• James Walker Fabric Seal
• OEM Fabric Reinforced Oil Seal

(Always verify dimensions, seal profile, material, and application requirements before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for gearbox overhaul, heavy-duty pump repair, mining equipment maintenance, steel mill servicing, agricultural machinery maintenance, and OEM replacement applications.

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification