The CR Oil Seal 1.438x2.063x0.188 M/R NBR is designed for industrial rotary shaft applications requiring lubricant retention around a 1.438-inch shaft and a very narrow axial installation space.

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

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

Manufactured from NBR (Nitrile Butadiene Rubber), the sealing element is generally compatible with:

• 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, high continuous temperatures, ozone-rich environments, fuels, or specialized synthetic lubricants.

The inch dimensions correspond approximately to:

Shaft diameter: 1.438 inches or 36.53 mm

Housing diameter: 2.063 inches or 52.40 mm

Seal width: 0.188 inch or 4.78 mm

The narrow 0.188-inch axial width makes this seal suitable for compact housings and specialized machinery where installation depth is limited. Accurate dimensional measurement and verification of the original M/R cross-section are essential before replacement.

⚙️ Applications

• Industrial gearboxes
• 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 oil or compatible grease

✔ Oil-resistant NBR sealing material

✔ Suitable for 1.438-inch shaft assemblies

✔ Compact 0.188-inch axial width

✔ Reinforced or composite industrial construction

✔ Good resistance to wear and abrasion

✔ Suitable for maintenance and overhaul work

✔ Supports bearing and component protection

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• CR M/R Seal Reference
• Inch-Size Rotary Shaft Seal
• NBR Sealing Material
• Manufacturer-Specific Reinforced Profile
• Low-Pressure Lubricant Retention
• Ultra-Compact Axial Seal Width
• Approximately 36.53 mm Shaft Diameter
• M/R Cross-Section Verification Required

✅ Key Features

• CR Industrial Quality
• M/R Profile Reference
• Oil-Resistant NBR Material
• Reinforced or Composite Seal Construction
• Inch-Size 1.438x2.063x0.188 Dimensions
• Suitable for Compatible Oil and Grease
• Compact Industrial Replacement Seal
• OEM Cross-Reference Ready

📊 Specifications

Brand: CR

Model: M/R

Size: 1.438 × 2.063 × 0.188 inch

Metric Equivalent: Approximately 36.53 × 52.40 × 4.78 mm

Type: Compact 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 geometry against the original seal

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

Spring Type: Verify from the actual seal construction

Shaft Diameter (ID): 1.438 inches / approximately 36.53 mm

Housing Diameter (OD): 2.063 inches / approximately 52.40 mm

Width: 0.188 inch / approximately 4.78 mm

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

Lubrication: Oil and compatible grease

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

Application Class: Compact Industrial Bearing and Rotating Equipment

Standard: Inch-Size Specialized Industrial Seal

🔁 Equivalent

Suitable replacement for compatible:

• CR M/R Rotary Shaft Seal
• CR 1.438x2.063x0.188 Oil Seal
• 36.53x52.40x4.78 Rotary Seal
• 1.438-Inch Shaft Oil Seal
• Compact Inch-Size NBR Seal
• Industrial Bearing Housing Seal
• Industrial Gearbox Shaft Seal
• Pump Shaft Oil Seal
• OEM M/R Shaft Seal
• Reinforced Industrial Rotary Seal

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

(Always verify dimensions, M/R-profile geometry, lip direction, shaft and housing condition, installation depth, lubricant compatibility, rotational speed, temperature, pressure, and operating conditions before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for compact bearing-housing maintenance, gearbox overhaul, pump repair, transmission servicing, agricultural machinery maintenance, 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