The STEMCO Oil Seal 4.938x6.441x0.963 TCN NBR is designed for heavy-duty rotary shaft applications requiring lubricant retention around a 4.938-inch shaft within a 6.441-inch housing bore.

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

The product is identified by the STEMCO manufacturer designation TCN. This is a manufacturer-specific profile code. The exact sealing-lip geometry, number of lips, dust-exclusion arrangement, outside-case construction, internal reinforcement, spring configuration, lip orientation, and installation direction should be verified against the original seal, technical drawing, or equipment specification before replacement.

With a width of 0.963 inch, this product has a relatively deep axial section. This may indicate a specialized reinforced or multi-element seal arrangement, but the exact construction must be verified from the original cross-section rather than inferred from the TCN code or width alone.

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 normal industrial operating conditions. Compatibility should be verified before use with aggressive chemicals, fuels, continuous elevated temperatures, ozone-rich environments, or specialized synthetic lubricants.

The inch dimensions convert approximately to:

Shaft diameter: 4.938 inches or approximately 125.43 mm

Housing diameter: 6.441 inches or approximately 163.60 mm

Seal width: 0.963 inch or approximately 24.46 mm

The 4.938 × 6.441 × 0.963-inch configuration is suitable for large bearing housings, heavy industrial gearboxes, axle and hub assemblies, transmissions, pumps, conveyor drives, and legacy machinery requiring a deep-section inch-size shaft seal.

For a seal of this size, shaft finish, shaft hardness, housing alignment, concentricity, shaft runout, installation depth, axial space, and correct lip lubrication are particularly important for dependable sealing performance and service life.

⚙️ Applications

• Heavy industrial gearboxes
• Large bearing housings
• Axle and hub assemblies
• Industrial pumps
• Mechanical transmissions
• Construction equipment
• Agricultural machinery
• Conveyor drive systems
• 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 approximately 125.43 mm shafts

✔ Manufacturer-specific STEMCO TCN profile

✔ Deep 0.963-inch axial section

✔ Good resistance to abrasion and wear

✔ Suitable for maintenance and overhaul work

✔ Replacement ready when dimensions and profile match

🧠 Technical Insight

• STEMCO TCN Seal Reference
• Large Inch-Size Rotary Shaft Seal
• Deep-Section Seal Construction
• Oil-Resistant NBR Material
• Low-Pressure Lubricant Retention
• Alignment and Runout Control Are Critical
• Approximately 125.43 mm Shaft Diameter
• Exact TCN Cross-Section Must Be Verified

✅ Key Features

• STEMCO Industrial Quality
• TCN Profile Reference
• Oil-Resistant NBR Material
• Large Inch-Size Construction
• 4.938x6.441x0.963 Dimensions
• Approximately 24.46 mm Axial Width
• Heavy Industrial Replacement Seal
• Cross-Reference Support Available

📊 Specifications

Brand: STEMCO

Model / Profile: TCN

Size: 4.938 × 6.441 × 0.963 inch

Metric Equivalent: Approximately 125.43 × 163.60 × 24.46 mm

Type: Large Deep-Section Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: TCN

Construction: Manufacturer-Specific STEMCO TCN Rotary Shaft-Seal Construction

Lip Design: TCN profile; verify the exact sealing-lip geometry, number of lips, and orientation against the original seal or technical drawing

Dust Lip: Verify from the actual TCN cross-section

Spring Type: Verify from the actual seal construction

Shaft Diameter (ID): 4.938 inches / approximately 125.43 mm

Housing Diameter (OD): 6.441 inches / approximately 163.60 mm

Width: 0.963 inch / approximately 24.46 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, surface finish, lubrication, temperature, alignment, concentricity, runout, lip loading, and NBR compound

Installation Consideration: Confirm shaft finish, shaft hardness, housing-bore condition, installation depth, available axial space, lip direction, concentricity, and shaft-edge protection before fitting

Application Class: Large and Heavy-Duty Industrial Bearing, Axle, and Rotating Equipment

Standard: Inch-Size Specialized Industrial Seal

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• STEMCO TCN NBR Rotary Shaft Seal
• STEMCO 4.938x6.441x0.963 Oil Seal
• 125.43x163.60x24.46 Rotary Seal
• 4.938-Inch Shaft Oil Seal
• Deep-Section NBR Rotary Seal
• Large Bearing Housing Seal
• Heavy Gearbox Shaft Seal
• Axle and Hub Oil Seal
• OEM TCN Profile Oil Seal
• Heavy Industrial NBR Shaft Seal

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

(Always verify dimensions, TCN-profile geometry, lip direction, shaft finish, shaft hardness, housing condition, installation depth, available axial space, lubricant compatibility, rotational speed, temperature, alignment, concentricity, runout, pressure, and operating conditions before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for heavy gearbox overhaul, large bearing-housing maintenance, axle and hub repair, industrial pump servicing, transmission overhaul, construction-equipment maintenance, agricultural-machinery repair, 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