The TROSTEL Oil Seal 1.344x2.575x0.688 M/R NBR is designed for industrial rotary shaft applications requiring reliable lubricant retention and a robust sealing section around an inch-size shaft assembly.

Installed between the rotating shaft and stationary housing, the seal creates controlled radial contact with the shaft surface. This helps reduce leakage of oil or compatible grease while limiting the entry of dust, dirt, moisture, and abrasive contaminants into the bearing, gearbox, pump, or transmission assembly.

The product is identified by the TROSTEL manufacturer designation M/R. Because industrial seal profile codes are manufacturer-specific, the exact sealing-lip geometry, outside-diameter construction, reinforcing components, spring arrangement, and installation direction should be compared with the original seal or technical drawing before replacement.

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 oil, wear, and abrasion under standard industrial operating conditions. Compatibility should be confirmed before use with aggressive chemicals, high continuous temperatures, ozone-rich environments, or specialized synthetic lubricants.

The inch dimensions correspond approximately to:

Shaft diameter: 1.344 inches or 34.14 mm

Housing diameter: 2.575 inches or 65.41 mm

Seal width: 0.688 inch or 17.48 mm

The relatively wide seal section and specific housing diameter suggest that this seal may be intended for a dedicated bearing housing, gearbox, transmission, axle assembly, or OEM industrial machine. Accurate dimensional measurement and M/R profile verification are essential before installation.

⚙️ 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

✔ Protects bearings and rotating components

✔ Oil-resistant NBR sealing material

✔ Suitable for inch-size shaft assemblies

✔ Wide heavy-duty sealing section

✔ Good resistance to wear and abrasion

✔ Suitable for maintenance and overhaul work

✔ Supports longer bearing service life

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• TROSTEL M/R Seal Reference
• Inch-Size Rotary Shaft Seal
• NBR Sealing Material
• Radial Shaft-Sealing Function
• Lubricant Retention Design
• Wide Heavy-Duty Seal Section
• Approximately 34.14 mm Shaft Diameter
• M/R Profile Verification Required

✅ Key Features

• TROSTEL Industrial Quality
• M/R Profile Reference
• Reinforced Rotary Shaft Construction
• Oil-Resistant NBR Material
• Inch-Size Dimensions
• Suitable for Compatible Oil and Grease
• Industrial Replacement Seal
• OEM Cross-Reference Ready

📊 Specifications

Brand: TROSTEL

Model: M/R

Size: 1.344 × 2.575 × 0.688 inch

Metric Equivalent: Approximately 34.14 × 65.41 × 17.48 mm

Type: Heavy-Duty Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: M/R

Construction: Manufacturer-Specific Reinforced Shaft-Seal Construction

Lip Design: M/R profile; verify 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): 1.344 inches / approximately 34.14 mm

Housing Diameter (OD): 2.575 inches / approximately 65.41 mm

Width: 0.688 inch / approximately 17.48 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: Heavy-Duty Industrial Bearing and Rotating Equipment

Standard: Inch-Size Industrial Seal

🔁 Equivalent

Suitable replacement for compatible:

• TROSTEL M/R Rotary Shaft Seal
• 1.344x2.575x0.688 Oil Seal
• 34.14x65.41x17.48 Rotary Seal
• Inch-Size NBR Oil Seal
• Industrial Bearing Housing Seal
• Industrial Gearbox Shaft Seal
• Pump Shaft Oil Seal
• Transmission Shaft Seal
• OEM M/R Shaft Seal
• Heavy-Duty Rotary Shaft Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original M/R cross-section, lip orientation, outside-case construction, spring arrangement, reinforcing components, and material compound.

(Always verify dimensions, M/R profile geometry, lip direction, spring construction, 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, transmission servicing, agricultural 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