The TROSTEL 4.000x5.131x0.625 M/L Leather Oil Seal is engineered for industrial rotating equipment requiring durable sealing performance and traditional leather sealing technology. TROSTEL has a long history of manufacturing industrial sealing solutions for demanding applications.

The M/L Profile combines a reinforced carbon steel outer case with a genuine leather sealing lip. This traditional design has been widely used in industrial pumps, gearboxes, compressors, agricultural equipment, mining machinery, and heavy-duty rotating systems due to its excellent ability to conform naturally to shaft surfaces while maintaining reliable sealing performance. TROSTEL leather seals commonly utilize carbon steel cases with genuine leather sealing elements.

Unlike conventional synthetic rubber seals, genuine leather absorbs lubricating oil and creates a natural lubrication film between the sealing lip and shaft surface. This helps reduce friction, minimize shaft wear, and maintain sealing efficiency during long-term operation. Leather seals are particularly effective in dirty environments and can sometimes withstand operating conditions that synthetic rubber seals cannot.

Leather oil seals are especially suitable for equipment originally designed with leather sealing technology, machinery restoration projects, and older industrial equipment requiring original-style sealing solutions. Their excellent shaft conformability makes them highly suitable for shafts with minor wear patterns.

The reinforced carbon steel case provides dimensional stability and secure housing retention while the leather sealing element maintains effective lubricant retention and contamination protection throughout the service life of the equipment.

With dimensions of 4.000 x 5.131 x 0.625 inch, this seal is commonly used in industrial pumps, heavy-duty gearboxes, mining equipment, agricultural machinery, compressors, conveyor systems, restoration projects, and OEM equipment utilizing inch-size shaft systems.

⚙️ Applications

• Industrial gearboxes
• Industrial pumps
• Mining equipment
• Agricultural machinery
• Air compressors
• Conveyor systems
• Power transmission equipment
• Heavy industrial machinery
• Restoration projects
• OEM machinery

🎯 Benefits

✔ Genuine leather sealing technology

✔ Excellent lubricant retention

✔ Outstanding wear resistance

✔ Suitable for worn shaft surfaces

✔ Performs well in dusty environments

✔ Long service life

✔ Ideal for machinery restoration

✔ Reliable oil and grease sealing

✔ Maintains original equipment specifications

🧠 Technical Insight

• M/L Metal Case + Leather Lip Design
• Genuine Leather Sealing Element
• Carbon Steel Case Construction
• Self-Lubricating Leather Technology
• Suitable for Oil & Grease Lubrication
• Excellent Shaft Conformability
• Designed for Harsh Industrial Environments
• Traditional Heavy-Duty Sealing Solution

✅ Key Features

• TROSTEL Industrial Quality
• M/L Leather Seal Design
• Genuine Leather Sealing Lip
• Reinforced Carbon Steel Case
• Excellent Wear Resistance
• Suitable for Restoration Projects
• OEM Replacement Ready
• Long Service Life

📊 Specifications

Brand: TROSTEL

Model: M/L

Size: 4.000 x 5.131 x 0.625 inch

Type: Leather Rotary Shaft Oil Seal

Material: Genuine Leather

Case Material: Carbon Steel

Profile: M/L

Construction: Metal Case + Leather Lip

Shaft Diameter (ID): 4.000 inch

Housing Diameter (OD): 5.131 inch

Width: 0.625 inch

Lubrication: Oil & Grease

Application Class: Heavy Industrial Service

Standard: Inch Size Oil Seal

🔁 Equivalent

Suitable replacement for:

• SKF Leather Oil Seal
• CR Chicago Rawhide Leather Seal
• National Leather Seal
• SCHNEIDER Leather Seal
• REPCO Leather Seal
• Garlock Leather Seal
• Federal-Mogul Leather Seal
• OEM Leather Oil Seal

(Always verify dimensions and seal profile before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for industrial maintenance, machinery restoration, gearbox repair, pump overhaul, mining equipment service, 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