The TROSTEL Oil Seal 2.047x4.365x0.469 M/R NBR is intended for industrial rotary shaft applications requiring lubricant retention around a 2.047-inch shaft within a comparatively large 4.365-inch housing bore.

Installed between a rotating shaft and stationary housing, the sealing element creates controlled radial contact with the shaft surface. This helps reduce leakage of compatible oil or grease while protecting bearings, gears, pumps, transmissions, and other internal components from external contamination.

The product is identified by the TROSTEL manufacturer designation M/R. This is a manufacturer-specific profile code and should not be interpreted solely from the individual letters. The exact cross-section, sealing-element geometry, number of lips, reinforcement arrangement, outside-case construction, internal support, spring configuration, dust-exclusion feature, and installation orientation should be verified against the original seal or technical drawing.

Manufactured from NBR (Nitrile Butadiene Rubber), the sealing element is generally suitable for:

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

NBR provides good resistance to petroleum-based oils, grease, abrasion, and mechanical wear under standard industrial operating conditions. Compatibility should be confirmed before use with aggressive chemicals, fuels, high continuous temperatures, ozone-rich environments, or specialized synthetic lubricants.

The inch dimensions convert approximately to:

Shaft diameter: 2.047 inches or 51.99 mm

Housing diameter: 4.365 inches or 110.87 mm

Seal width: 0.469 inch or 11.91 mm

The large difference between the shaft and housing diameters suggests a specialized broad-section or supported sealing arrangement rather than a conventional compact radial oil seal. Accurate verification of the M/R cross-section, internal support, housing geometry, installation depth, and orientation is essential before replacement.

⚙️ Applications

• Industrial gearboxes
• Large bearing housings
• Industrial pumps
• Mechanical transmissions
• Power transmission systems
• Agricultural machinery
• Construction equipment
• Conveyor drive assemblies
• Legacy industrial equipment
• OEM rotating machinery

🎯 Benefits

✔ Helps retain compatible oil or grease

✔ Protects bearings and internal components

✔ Oil-resistant NBR sealing material

✔ Suitable for 2.047-inch shaft assemblies

✔ Specialized broad-section construction

✔ Good resistance to abrasion and wear

✔ Suitable for maintenance and overhaul work

✔ Supports legacy and imported machinery

✔ Replacement ready when dimensions and profile match

🧠 Technical Insight

• TROSTEL M/R Seal Reference
• Specialized Inch-Size Rotary Shaft Seal
• NBR Sealing Material
• Manufacturer-Specific M/R Profile
• Reinforced or Composite Construction
• Broad Radial Seal Section
• Approximately 51.99 mm Shaft Diameter
• Exact M/R Cross-Section Must Be Verified

✅ Key Features

• TROSTEL Industrial Quality
• M/R Profile Reference
• Oil-Resistant NBR Material
• Specialized Reinforced Construction
• Inch-Size 2.047x4.365x0.469 Dimensions
• Suitable for Compatible Oil and Grease
• Industrial Replacement Seal
• Cross-Reference Support Available

📊 Specifications

Brand: TROSTEL

Model / Profile: M/R

Size: 2.047 × 4.365 × 0.469 inch

Metric Equivalent: Approximately 51.99 × 110.87 × 11.91 mm

Type: Specialized Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: M/R

Construction: Manufacturer-Specific Reinforced or Composite NBR Shaft-Seal Arrangement

Lip Design: M/R profile; verify the exact sealing geometry and orientation against the original seal or technical drawing

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

Spring Type: Verify from the actual seal construction

Internal Support: Verify the original carrier, spacer, reinforcement, or support arrangement

Shaft Diameter (ID): 2.047 inches / approximately 51.99 mm

Housing Diameter (OD): 4.365 inches / approximately 110.87 mm

Width: 0.469 inch / approximately 11.91 mm

Pressure Capability: Low-pressure rotary shaft-sealing service unless otherwise specified

Lubrication: Compatible oil and grease

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

Speed Consideration: Permissible speed depends on shaft diameter, sealing geometry, surface finish, lubrication, temperature, alignment, runout, and material compound

Application Class: Specialized Industrial Bearing and Rotating Equipment

Standard: Inch-Size Specialized Industrial Seal

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• TROSTEL M/R NBR Rotary Shaft Seal
• TROSTEL 2.047x4.365x0.469 Oil Seal
• 51.99x110.87x11.91 Rotary Seal
• 2.047-Inch Shaft Oil Seal
• Large-Housing NBR Shaft Seal
• Broad-Section Rotary Shaft Seal
• Industrial Bearing Housing Seal
• Industrial Gearbox Shaft Seal
• Industrial Pump Shaft Seal
• OEM M/R Profile Oil Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original M/R cross-section, sealing-element geometry, lip orientation, outside-case construction, reinforcement arrangement, internal support, spring configuration, installation direction, material compound, and operating requirements.

(Always verify dimensions, M/R-profile geometry, internal support, lip direction, shaft finish, housing condition, installation depth, lubricant compatibility, rotational speed, temperature, runout, pressure, 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, industrial pump repair, transmission servicing, agricultural-machinery repair, construction-equipment maintenance, conveyor-drive servicing, legacy-equipment 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