The Cartridge Seal OEM 3.625x5.066x1.438 M/R NBR is designed for rotary shaft applications around a 3.625-inch shaft within a nominal 5.066-inch housing diameter.

This product is identified as a Cartridge Seal, meaning the sealing system should be treated as an integrated assembly rather than as a simple conventional radial oil seal. The broad 1.438-inch axial width, equivalent to approximately 36.53 mm, further indicates a deep installation envelope and a potentially complex internal arrangement.

The M/R designation is manufacturer-specific. Exact sealing-lip geometry, number of sealing elements, internal reinforcement, spring arrangement, outside carrier design, lip orientation, axial sequence, and installation direction should be verified against the original cartridge seal or OEM technical drawing.

The seal is specified with NBR (Nitrile Butadiene Rubber), generally suitable for:

• Mineral oils
• Gear oils
• Hydraulic oils
• Bearing grease
• Petroleum-based lubricants
• General industrial lubricating fluids

NBR generally provides good resistance to petroleum-based oils, grease, abrasion, and mechanical wear in standard industrial service. Compatibility should be verified for aggressive chemicals, certain fuels, specialized synthetic lubricants, ozone-rich environments, or sustained high-temperature operation.

The inch dimensions convert approximately to:

Shaft diameter: 3.625 inches / 92.08 mm

Housing diameter: 5.066 inches / 128.68 mm

Seal width: 1.438 inches / 36.53 mm

Because this is a deep-section cartridge assembly, replacement selection should be based on the complete cross-section and installation geometry, not only on ID × OD × Width.

⚙️ Applications

• Heavy industrial gearboxes
• Large bearing housings
• Mechanical transmissions
• Axle and hub assemblies
• Industrial drive systems
• Construction machinery
• Agricultural machinery
• Conveyor drive assemblies
• Legacy rotating equipment
• OEM equipment overhaul

🎯 Benefits

✔ Integrated cartridge-style sealing assembly

✔ Suitable for 3.625-inch shaft applications

✔ Deep 1.438-inch axial construction

✔ NBR suitable for many oil and grease applications

✔ Reinforced / composite M/R arrangement

✔ Suitable for heavy industrial rotating equipment

✔ Metal-supported structural configuration

✔ Useful for repair and overhaul of legacy machinery

✔ Replacement candidate when the complete cartridge geometry matches

🧠 Technical Insight

• OEM Cartridge Seal Reference
• Deep-Section Rotary Shaft Seal
• 1.438-Inch / 36.53 mm Axial Width
• Manufacturer-Specific M/R Profile
• NBR Sealing Material
• Reinforced Multi-Component Assembly
• 92.08 mm Shaft Diameter
• Exact Cartridge Cross-Section Must Be Verified

✅ Key Features

• Cartridge Seal Construction
• OEM Industrial Application
• M/R Profile Reference
• NBR Sealing Material
• Reinforced Metal-Supported Assembly
• 3.625x5.066x1.438 Dimensions
• Heavy-Duty Replacement Application
• Cross-Reference Support Available

📊 Specifications

Brand: OEM

Model / Profile: M/R

Product Type: Cartridge Seal

Size: 3.625 × 5.066 × 1.438 inch

Metric Equivalent: Approximately 92.08 × 128.68 × 36.53 mm

Type: Deep-Section Reinforced / Composite Cartridge Rotary Shaft Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: M/R

Construction: Manufacturer-Specific Integrated Cartridge / Reinforced Metal-Supported Rotary Shaft-Seal Assembly

Lip Design: M/R profile; verify exact sealing-lip geometry, number of sealing elements, sequence, and orientation against the original cartridge seal or OEM drawing

Dust Lip: Verify from the actual M/R cartridge cross-section

Spring Type: Verify from the actual cartridge-seal construction

Shaft Diameter (ID): 3.625 inches / approximately 92.08 mm

Housing Diameter (OD): 5.066 inches / approximately 128.68 mm

Width: 1.438 inches / approximately 36.53 mm

Section Design: Deep axial cartridge section; do not infer the number of lips, sealing elements, or internal layers solely from the width

Pressure Capability: Primarily low-pressure rotary shaft-sealing service unless the specific OEM cartridge design states otherwise

Lubrication: Compatible oil and grease

Temperature Range: Typically approximately -30°C to +100°C for standard NBR; verify the actual compound, lubricant, speed, and operating conditions

Speed Consideration: Permissible speed depends on shaft diameter, surface finish, lubrication, temperature, alignment, concentricity, runout, sealing-element loading, and actual cartridge construction

Installation Consideration: Carefully verify complete cartridge depth, housing shoulder geometry, shaft finish and hardness, axial positioning, concentricity, runout, sealing-element orientation, and installation direction

Application Class: Heavy-Duty Industrial Bearing, Gearbox, Transmission, Axle, and Legacy Rotating Equipment

Standard: Inch-Size Specialized OEM Cartridge Seal

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• OEM M/R NBR Cartridge Seal
• OEM 3.625x5.066x1.438 Cartridge Seal
• 92.08x128.68x36.53 Cartridge Seal
• 3.625-Inch Shaft Cartridge Seal
• Deep-Section NBR Cartridge Seal
• Reinforced Rotary Shaft Cartridge Seal
• Composite Industrial Shaft Seal
• Heavy-Duty Bearing Housing Cartridge Seal
• Heavy Gearbox Shaft Seal
• Legacy Equipment M/R Cartridge Seal

The same ID, OD, and width do not guarantee interchangeability. A compatible replacement must also match the original cartridge cross-section, M/R geometry, internal component arrangement, sealing-lip geometry, metal carrier structure, reinforcement method, spring configuration, axial depth, orientation, material specification, and operating requirements.

The 1.438-inch width should not be used alone to infer multiple lips or internal sealing stages.

(Always verify dimensions, complete cartridge construction, M/R profile, internal arrangement, shaft finish, housing geometry, installation depth, lubricant compatibility, rotational speed, temperature, concentricity, runout, pressure, and operating conditions before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for heavy gearbox overhaul, bearing-housing maintenance, transmission repair, axle assemblies, industrial drive systems, construction machinery, agricultural machinery, legacy-equipment restoration, and compatible OEM applications.

📲 Contact via LINE ID: dusitrea

📧 Email: sales@seal4go.com

💬 Technical support available before ordering

🔍 Assistance available for cross-reference and equivalent part identification