The AEROQUIP Oil Seal 1.250x2.125x0.313 SC NBR is designed for rotary shaft applications requiring lubricant retention around a 1.250-inch shaft within a 2.125-inch housing bore.

The SC profile is commonly configured with a single primary radial sealing lip. A garter spring is typically used to maintain controlled radial loading of the sealing lip against the rotating shaft surface. Unlike a standard TC-style design, SC generally does not incorporate an auxiliary dust lip.

The seal commonly uses an elastomer sealing element with internal metal reinforcement to maintain dimensional stability and retention within the housing. However, the exact AEROQUIP SC cross-section, case construction, spring arrangement, lip orientation, and outside surface should still be checked against the original seal or technical drawing before replacement.

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 conditions. Compatibility should be verified before use with aggressive chemicals, certain fuels, specialized synthetic lubricants, ozone-rich environments, or continuous high-temperature service.

The inch dimensions convert to:

Shaft diameter: 1.250 inches or 31.75 mm

Housing diameter: 2.125 inches or 53.98 mm

Seal width: 0.313 inch or approximately 7.95 mm

The 1.250 × 2.125 × 0.313-inch size is suitable for compact bearing housings, pumps, motors, gearboxes, transmissions, and OEM machinery using an inch-size single-lip shaft-sealing arrangement.

⚙️ Applications

• Industrial gearboxes
• Bearing housings
• Electric motors
• Industrial pumps
• Mechanical transmissions
• Agricultural machinery
• Construction equipment
• Conveyor drive assemblies
• General rotating machinery
• OEM industrial equipment

🎯 Benefits

✔ Helps retain compatible oil or grease

✔ Single primary sealing lip

✔ Garter spring helps maintain lip contact

✔ Oil-resistant NBR material

✔ Suitable for 1.250-inch shaft assemblies

✔ Compact 0.313-inch axial width

✔ Good resistance to abrasion and wear

✔ Suitable for maintenance and overhaul work

✔ Replacement ready when dimensions and SC profile match

🧠 Technical Insight

• AEROQUIP SC Seal Reference
• Inch-Size Rotary Shaft Seal
• Single Primary Sealing Lip
• Garter-Spring Main Lip
• No Auxiliary Dust Lip in Typical SC Construction
• NBR Sealing Material
• 31.75 mm Shaft Diameter
• Exact AEROQUIP SC Construction Should Be Verified

✅ Key Features

• AEROQUIP Industrial Quality
• SC Profile Reference
• Single-Lip Design
• Garter-Spring Main Lip
• Oil-Resistant NBR Material
• 1.250x2.125x0.313 Dimensions
• Industrial Replacement Seal
• Cross-Reference Support Available

📊 Specifications

Brand: AEROQUIP

Model / Profile: SC

Size: 1.250 × 2.125 × 0.313 inch

Metric Equivalent: Approximately 31.75 × 53.98 × 7.95 mm

Type: Single-Lip Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: SC

Construction: Elastomer sealing element with internal metal reinforcement; verify exact AEROQUIP SC construction

Lip Design: Single primary radial sealing lip

Dust Lip: Typically none in SC construction

Spring Type: Garter spring on the primary sealing lip

Shaft Diameter (ID): 1.250 inches / 31.75 mm

Housing Diameter (OD): 2.125 inches / 53.98 mm

Width: 0.313 inch / approximately 7.95 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, lip loading, alignment, runout, and NBR compound

Installation Consideration: Confirm shaft finish, housing-bore condition, installation depth, spring side, lip orientation, and protection from sharp shaft edges before fitting

Application Class: Compact-to-Medium Industrial Bearing and Rotating Equipment

Standard: Inch-Size SC Rotary Shaft Seal

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• AEROQUIP SC NBR Rotary Shaft Seal
• AEROQUIP 1.250x2.125x0.313 Oil Seal
• 31.75x53.98x7.95 Oil Seal
• 1.250-Inch Shaft Oil Seal
• Single-Lip NBR Shaft Seal
• SC Rotary Shaft Seal
• Spring-Loaded Rotary Oil Seal
• Industrial Bearing Housing Seal
• Industrial Pump Shaft Seal
• OEM SC Profile Oil Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original SC cross-section, primary-lip geometry, garter-spring configuration, case construction, material compound, lip direction, installation depth, and operating requirements.

(Always verify dimensions, SC profile, lip geometry, spring configuration, shaft finish, housing condition, installation depth, lubricant compatibility, rotational speed, temperature, runout, pressure, and operating conditions before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for gearbox overhaul, bearing-housing maintenance, electric-motor repair, industrial pump servicing, transmission maintenance, agricultural-machinery repair, construction-equipment maintenance, 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