The REPCO Oil Seal 4.750x5.750x0.500 LGSP Silicone is designed for industrial rotary shaft applications requiring lubricant retention around a 4.750-inch shaft under a relatively wide operating-temperature range.

Installed between the 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, gearboxes, pumps, transmissions, and internal rotating components from contamination.

The product is identified by the REPCO manufacturer designation LGSP. Because industrial seal-profile codes may differ between manufacturers and production series, the exact sealing-lip geometry, number of lips, dust-lip arrangement, outside-case construction, internal reinforcement, spring configuration, and installation direction should be compared with the original seal or technical drawing before replacement.

The sealing element is manufactured from Silicone Rubber (VMQ), which is generally selected for applications requiring:

• High-temperature resistance
• Good flexibility at low temperatures
• Resistance to ozone and weathering
• Stable elasticity over a broad temperature range
• Compatibility with selected mineral oils and greases
• Reliable sealing at suitable shaft speeds

Silicone rubber generally has lower abrasion, tear, and wear resistance than NBR or FKM. Shaft finish, concentricity, lubrication, rotational speed, and installation condition are therefore particularly important. The sealing lip should not operate dry unless the application has been specifically approved for dry-running service.

Fluid compatibility must also be verified because Silicone may not be suitable for every fuel, aggressive chemical, specialized synthetic lubricant, or high-pressure application.

The inch dimensions correspond approximately to:

Shaft diameter: 4.750 inches or 120.65 mm

Housing diameter: 5.750 inches or 146.05 mm

Seal width: 0.500 inch or 12.70 mm

The large shaft diameter and 0.500-inch axial width make this seal suitable for specialized bearing housings, industrial gearboxes, pumps, process machinery, transmissions, and OEM equipment using an inch-size rotary shaft-sealing arrangement. Accurate dimensional measurement and LGSP-profile verification are essential before installation.

⚙️ Applications

• High-temperature bearing housings
• Industrial gearboxes
• Industrial pumps
• Mechanical transmissions
• Process machinery
• Electric motor assemblies
• Agricultural machinery
• Construction equipment
• Legacy industrial equipment
• OEM rotating machinery

🎯 Benefits

✔ Wide operating-temperature capability

✔ Good flexibility at low temperatures

✔ Helps retain compatible oil or grease

✔ Protects bearings and rotating components

✔ Good resistance to ozone and weathering

✔ Suitable for 4.750-inch shaft assemblies

✔ Suitable for maintenance and overhaul work

✔ Supports temperature-sensitive industrial applications

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• REPCO LGSP Seal Reference
• Inch-Size Rotary Shaft Seal
• Silicone Rubber VMQ Material
• Wide Temperature Capability
• Radial Shaft-Sealing Function
• Low-Pressure Lubricant Retention
• 120.65 mm Shaft Diameter
• LGSP Cross-Section Verification Required

✅ Key Features

• REPCO Industrial Quality
• LGSP Profile Reference
• Heat-Resistant Silicone Material
• Good Low-Temperature Flexibility
• Large Inch-Size Construction
• 4.750x5.750x0.500 Dimensions
• Industrial Replacement Seal
• OEM Cross-Reference Ready

📊 Specifications

Brand: REPCO

Model: LGSP

Size: 4.750 × 5.750 × 0.500 inch

Metric Equivalent: 120.65 × 146.05 × 12.70 mm

Type: High-Temperature Rotary Shaft Oil Seal

Material: Silicone Rubber / VMQ

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): 4.750 inches / 120.65 mm

Housing Diameter (OD): 5.750 inches / 146.05 mm

Width: 0.500 inch / 12.70 mm

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

Lubrication: Compatible oil and grease; fluid compatibility must be verified

Temperature Range: Typically approximately -60°C to +200°C for general VMQ compounds; verify the actual compound, lubricant, speed, and operating conditions

Speed Consideration: Suitable speed depends on shaft diameter, surface finish, lubrication, temperature, alignment, and compound

Application Class: Temperature-Resistant Industrial Rotating Equipment

Standard: Inch-Size Industrial Seal

🔁 Equivalent

Suitable replacement for compatible:

• REPCO LGSP Silicone Rotary Shaft Seal
• REPCO 4.750x5.750x0.500 Oil Seal
• 120.65x146.05x12.70 Rotary Seal
• 4.750-Inch Shaft Oil Seal
• Inch-Size Silicone Oil Seal
• High-Temperature Bearing Housing Seal
• Industrial Gearbox Silicone Seal
• Pump Shaft Silicone Seal
• OEM LGSP Shaft Seal
• Industrial VMQ Rotary Shaft Seal

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

(Always verify dimensions, LGSP-profile geometry, lip direction, spring construction, shaft and housing condition, lubricant compatibility, rotational speed, temperature, installation depth, and operating conditions before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for high-temperature bearing-housing maintenance, gearbox overhaul, pump repair, process-equipment servicing, transmission 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