The TROSTEL 2.875x3.879x0.406 M/R NBR Oil Seal is engineered for industrial rotating equipment requiring dependable sealing performance and long service life under continuous operating conditions.

The M/R Profile is a traditional heavy-duty rotary shaft seal design consisting of a reinforced metal outer case and a spring-loaded sealing lip. The metal case provides excellent dimensional stability and secure housing retention, while the garter spring maintains constant radial pressure against the shaft surface to ensure consistent sealing performance throughout operation.

This design effectively retains lubricating oil and grease inside equipment while preventing dust, dirt, moisture, and abrasive particles from entering the system. As a result, bearings, shafts, and internal rotating components remain protected, helping reduce maintenance costs and extend equipment service life.

Manufactured from premium NBR (Nitrile Butadiene Rubber), the seal offers excellent resistance to mineral oils, hydraulic fluids, gear oils, lubricating greases, and petroleum-based lubricants. NBR is widely used throughout industrial applications because of its excellent wear resistance, flexibility, and long-term durability.

The spring-loaded sealing lip compensates for minor shaft wear and helps maintain sealing efficiency throughout the seal's operating life. This makes the M/R profile particularly suitable for industrial machinery operating in harsh environments where reliability is critical.

With dimensions of 2.875 x 3.879 x 0.406 inch, this oil seal is commonly used in industrial pumps, gearboxes, speed reducers, compressors, agricultural equipment, conveyor systems, and OEM rotating machinery utilizing inch-size shaft systems.

⚙️ Applications

• Industrial gearboxes
• Speed reducers
• Industrial pumps
• Electric motors
• Air compressors
• Agricultural machinery
• Conveyor systems
• Power transmission equipment
• Construction machinery
• OEM machinery

🎯 Benefits

✔ Excellent oil retention

✔ Reliable shaft sealing performance

✔ Protects bearings and shafts

✔ Reduces lubricant leakage

✔ Extends equipment service life

✔ Excellent wear resistance

✔ Suitable for continuous-duty operation

✔ Reliable industrial performance

✔ Long operational lifespan

🧠 Technical Insight

• M/R Metal Case Design
• Spring Loaded Main Lip
• Reinforced Steel Construction
• Suitable for Oil & Grease Lubrication
• Excellent Oil Resistance
• Designed for Rotary Equipment
• Reliable Shaft Protection
• Industrial Duty Sealing Solution

✅ Key Features

• TROSTEL Industrial Quality
• M/R Profile Design
• Reinforced Metal Case
• Premium NBR Material
• Spring Loaded Sealing Lip
• Excellent Wear Resistance
• OEM Replacement Ready
• Long Service Life

📊 Specifications

Brand: TROSTEL

Model: M/R

Size: 2.875 x 3.879 x 0.406 inch

Type: Rotary Shaft Oil Seal

Material: NBR (Nitrile Rubber)

Profile: M/R

Construction: Metal Case

Lip Design: Spring Loaded Main Lip

Spring Type: Garter Spring

Shaft Diameter (ID): 2.875 inch

Housing Diameter (OD): 3.879 inch

Width: 0.406 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 Metal Case Oil Seal
• CR Chicago Rawhide Oil Seal
• National Oil Seal
• Freudenberg Oil Seal
• NOK Oil Seal
• CFW Rotary Shaft Seal
• KACO Oil Seal
• OEM Rotary Shaft Oil Seal

(Always verify dimensions and seal profile before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for gearbox overhaul, pump repair, reducer maintenance, compressor service, agricultural machinery repair, 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