The REPCO Oil Seal 5.375x6.504x0.563 M/L Leather is engineered for large 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 strength, dimensional stability, and secure installation within the housing, while the leather lip creates controlled sealing contact around the rotating shaft.

Unlike many synthetic elastomer seals, genuine leather can absorb a small amount of lubricating oil and maintain a thin lubricating film at the shaft contact area. This characteristic helps reduce dry friction and supports smoother operation under suitable operating conditions.

Leather sealing lips naturally conform to minor shaft wear and moderate surface irregularities. This makes the seal particularly suitable for older machinery, refurbished equipment, and restoration applications where preserving the original sealing configuration is important.

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

The inch dimensions correspond approximately to:

Shaft diameter: 5.375 inches or 136.53 mm

Housing diameter: 6.504 inches or 165.20 mm

Seal width: 0.563 inch or 14.30 mm

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

⚙️ Applications

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

🎯 Benefits

✔ Genuine leather sealing technology

✔ Reliable oil and grease retention

✔ Conforms well to slightly worn shafts

✔ Suitable for dusty industrial 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 136.53 mm Shaft Diameter
• M/L Profile Verification Required

✅ Key Features

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

📊 Specifications

Brand: REPCO

Model: M/L

Size: 5.375 × 6.504 × 0.563 inch

Metric Equivalent: Approximately 136.53 × 165.20 × 14.30 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): 5.375 inches / approximately 136.53 mm

Housing Diameter (OD): 6.504 inches / approximately 165.20 mm

Width: 0.563 inch / approximately 14.30 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:

• REPCO M/L Leather Rotary Shaft Seal
• 5.375x6.504x0.563 Leather Oil Seal
• 136.53x165.20x14.30 Rotary Seal
• NATIONAL Leather Oil Seal
• TROSTEL Leather Oil Seal
• CR Chicago Rawhide Leather Seal
• GARLOCK Leather Oil Seal
• SCHNIEDER M/L Leather Seal
• Large 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, installation direction, 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, large bearing-housing maintenance, pump repair, agricultural and construction 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