The TROSTEL Oil Seal 4.156x5.504x0.625 M/L Leather is engineered for industrial rotating equipment where durability, shaft adaptability, and reliable retention of oil or compatible grease are essential.

The M/L Profile combines a reinforced metal outer case with a genuine leather sealing lip. The metal case provides structural rigidity, dimensional stability, and secure installation in the housing, while the leather lip creates controlled sealing contact around the rotating shaft.

Unlike many synthetic elastomer seals, leather can absorb a small amount of lubricant and maintain a thin lubricating film at the contact area. This helps reduce dry friction, supports smoother operation, and may reduce wear on both the sealing lip and shaft under compatible operating conditions.

The natural conformability of leather also makes this seal suitable for older machinery, refurbished equipment, and shafts with minor wear or moderate surface irregularities. It is commonly selected for applications where traditional leather sealing technology is required to preserve the original machine configuration.

Manufactured from selected industrial leather, this seal is generally compatible with:

• Mineral oils
• Gear oils
• Bearing grease
• Industrial lubricating oils
• Petroleum-based lubricants
• Compatible grease-lubricated systems

Leather material performance depends on lubricant type, shaft speed, operating temperature, moisture exposure, and environmental conditions. These factors should be verified before installation.

The inch dimensions correspond approximately to:

Shaft diameter: 4.156 inches or 105.56 mm

Housing diameter: 5.504 inches or 139.80 mm

Seal width: 0.625 inch or 15.88 mm

The specific dimensions indicate that this seal may be intended for a dedicated bearing housing, gearbox, axle, transmission, or OEM industrial machine. Accurate dimensional measurement and M/L profile comparison are essential before replacement.

⚙️ Applications

• Industrial gearboxes
• Bearing housings
• Industrial pumps
• Agricultural machinery
• Construction equipment
• Mining machinery
• Conveyor drive assemblies
• Mechanical transmissions
• Legacy industrial equipment
• OEM rotating machinery

🎯 Benefits

✔ Genuine leather sealing technology

✔ Reliable oil and grease retention

✔ Conforms well to slightly worn shafts

✔ Performs effectively in dusty environments

✔ Reinforced metal case construction

✔ Good resistance to wear and abrasion

✔ Suitable for maintenance and overhaul work

✔ Ideal for legacy and restored machinery

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• M/L Metal Case + Leather Lip Design
• Genuine Oil-Treated Leather Sealing Element
• Reinforced Metal Case Construction
• Self-Lubricating Leather Characteristics
• Suitable for Compatible Oil and Grease
• Excellent Shaft Conformability
• Approximately 105.56 mm Shaft Diameter
• M/L Profile Verification Required

✅ Key Features

• TROSTEL Industrial Quality
• M/L Leather Profile
• Genuine Leather Sealing Lip
• Reinforced Metal Case
• Springless Seal Construction
• Heavy-Duty Inch-Size Design
• Industrial Replacement Seal
• OEM Cross-Reference Ready

📊 Specifications

Brand: TROSTEL

Model: M/L

Size: 4.156 × 5.504 × 0.625 inch

Metric Equivalent: Approximately 105.56 × 139.80 × 15.88 mm

Type: Leather Rotary Shaft Oil Seal

Material: Genuine Oil-Treated Industrial Leather

Case Material: Metal

Profile: M/L

Construction: Metal Case + Leather Sealing Lip

Lip Design: Genuine Leather Sealing Lip

Dust Lip: None unless otherwise shown in the original profile

Spring Type: None

Shaft Diameter (ID): 4.156 inches / approximately 105.56 mm

Housing Diameter (OD): 5.504 inches / approximately 139.80 mm

Width: 0.625 inch / approximately 15.88 mm

Pressure Capability: Low-pressure lubricant-retention service

Lubrication: Mineral Oil, Gear Oil and Compatible Grease

Temperature Range: Depends on the leather grade, lubricant, shaft speed, and operating conditions

Application Class: Heavy-Duty Industrial and Legacy Equipment

Standard: Inch-Size Industrial Seal

🔁 Equivalent

Suitable replacement for compatible:

• TROSTEL M/L Leather Rotary Shaft Seal
• 4.156x5.504x0.625 Leather Oil Seal
• 105.56x139.80x15.88 Rotary Seal
• NATIONAL Leather Oil Seal
• CR Chicago Rawhide Leather Seal
• GARLOCK Leather Oil Seal
• REPCO Leather Rotary Shaft Seal
• SCHNIEDER M/L Leather Seal
• Industrial Bearing Housing Leather Seal
• OEM Leather Rotary Shaft Oil Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original M/L cross-section, leather construction, lip orientation, outside-case design, and lubricant compatibility.

(Always verify dimensions, M/L profile geometry, leather grade, lip direction, shaft condition, lubricant compatibility, rotational speed, temperature, and operating conditions before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for gearbox overhaul, bearing-housing maintenance, pump repair, agricultural machinery servicing, mining equipment maintenance, legacy machinery restoration, and compatible 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