The REPCO Oil Seal 3.500x4.500x0.375 LGSP NBR is designed for industrial rotary shaft applications requiring dependable lubricant retention around a 3.500-inch shaft.

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 limiting the entry of dust, dirt, moisture, and abrasive particles into the bearing, gearbox, pump, transmission, or drive assembly.

The product is identified by the REPCO manufacturer designation LGSP. Because industrial seal-profile codes may vary between manufacturers and production series, the exact sealing-lip geometry, number of lips, outside-case construction, internal reinforcement, spring arrangement, dust-exclusion feature, 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 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, or specialized synthetic lubricants.

The inch dimensions correspond approximately to:

Shaft diameter: 3.500 inches or 88.90 mm

Housing diameter: 4.500 inches or 114.30 mm

Seal width: 0.375 inch or 9.53 mm

The relatively narrow 0.375-inch axial width makes this seal suitable for bearing housings, gearboxes, pumps, transmissions, and OEM machinery where installation depth is limited. Accurate dimensional measurement and LGSP-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 3.500-inch shaft assemblies

✔ Compact 0.375-inch axial width

✔ 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

• REPCO LGSP Seal Reference
• Inch-Size Rotary Shaft Seal
• NBR Sealing Material
• Radial Shaft-Sealing Function
• Low-Pressure Lubricant Retention
• Compact Axial Seal Width
• 88.90 mm Shaft Diameter
• LGSP Cross-Section Verification Required

✅ Key Features

• REPCO Industrial Quality
• LGSP Profile Reference
• Reinforced Rotary Shaft Construction
• Oil-Resistant NBR Material
• Inch-Size 3.500x4.500x0.375 Dimensions
• Suitable for Compatible Oil and Grease
• Industrial Replacement Seal
• OEM Cross-Reference Ready

📊 Specifications

Brand: REPCO

Model: LGSP

Size: 3.500 × 4.500 × 0.375 inch

Metric Equivalent: 88.90 × 114.30 × 9.53 mm

Type: Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: LGSP

Construction: Manufacturer-Specific Reinforced Rotary Shaft-Seal Construction

Lip Design: LGSP profile; verify the exact geometry against the original seal

Dust Lip: Verify from the actual LGSP cross-section

Spring Type: Verify from the actual seal construction

Shaft Diameter (ID): 3.500 inches / 88.90 mm

Housing Diameter (OD): 4.500 inches / 114.30 mm

Width: 0.375 inch / approximately 9.53 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: Industrial Bearing and Rotating Equipment

Standard: Inch-Size Industrial Seal

🔁 Equivalent

Suitable replacement for compatible:

• REPCO LGSP Rotary Shaft Seal
• REPCO 3.500x4.500x0.375 Oil Seal
• 88.90x114.30x9.53 Rotary Seal
• 3.500-Inch Shaft Oil Seal
• Inch-Size NBR Oil Seal
• Industrial Bearing Housing Seal
• Industrial Gearbox Shaft Seal
• Pump Shaft Oil Seal
• OEM LGSP Shaft Seal
• Industrial Rotary Shaft Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original LGSP cross-section, lip orientation, outside-case construction, spring arrangement, internal reinforcement, installation direction, and material compound.

(Always verify dimensions, LGSP-profile geometry, lip direction, spring construction, shaft and housing condition, installation depth, 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 machinery maintenance, construction-equipment repair, 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