The CR 4.375x6.250x0.500 CRWH1 NBR Oil Seal (Part No. 43820) is engineered for heavy-duty rotating machinery operating under severe industrial conditions where maximum sealing reliability and extended service life are essential. It is commonly used in industrial gearboxes, heavy-duty pumps, mining equipment, construction machinery, electric motors, agricultural machinery, and OEM rotating systems.

The CRWH1 Profile is a premium double-lip rotary shaft oil seal developed by Chicago Rawhide (CR). It incorporates a reinforced steel outer case, a spring-loaded primary sealing lip, and an auxiliary dust lip, providing excellent lubricant retention while preventing dirt, mud, moisture, and abrasive contaminants from entering the sealing system.

The primary sealing lip maintains constant radial pressure against the rotating shaft through a precision garter spring, ensuring consistent sealing performance while minimizing lubricant leakage. The secondary dust lip extends bearing life by preventing external contamination from reaching critical rotating components.

Manufactured from premium NBR (Nitrile Butadiene Rubber), this oil seal provides excellent resistance to:

• Mineral oils
• Hydraulic oils
• Gear oils
• Lubricating grease
• Petroleum-based lubricants

NBR delivers excellent abrasion resistance, flexibility, and long service life for industrial equipment. Typical operating capability is up to 0.5 Bar, with operating temperatures ranging from -40°C to +100°C, depending on lubricant compatibility and operating conditions.

With dimensions of 4.375 × 6.250 × 0.500 inch, this oil seal is commonly installed in industrial gearboxes, pumps, mining equipment, electric motors, conveyor systems, agricultural machinery, construction equipment, and OEM machinery utilizing inch-size shaft systems.

⚙️ Applications

• Industrial gearboxes
• Heavy-duty pumps
• Electric motors
• Mining equipment
• Construction machinery
• Agricultural machinery
• Conveyor systems
• Power transmission equipment
• Heavy industrial machinery
• OEM machinery

🎯 Benefits

✔ Double lip contamination protection

✔ Excellent oil retention

✔ Superior wear resistance

✔ Protects bearings and shafts

✔ Heavy-duty industrial construction

✔ Long service life

✔ Reliable sealing performance

✔ OEM quality replacement

✔ Reduces maintenance costs

🧠 Technical Insight

• CRWH1 Double Lip Design
• Reinforced Steel Case
• Spring Loaded Main Lip
• Auxiliary Dust Lip
• Premium NBR Material
• Oil & Grease Compatible
• Designed for Heavy Industrial Service
• Proven Chicago Rawhide Engineering

✅ Key Features

• Chicago Rawhide (CR) Quality
• CRWH1 Double Lip Profile
• Reinforced Steel Case
• Premium NBR Material
• Main Lip + Dust Lip
• Excellent Wear Resistance
• OEM Replacement Ready
• Long Service Life

📊 Specifications

Brand: CR (Chicago Rawhide)

Part Number: 43820

Model: CRWH1

Size: 4.375 × 6.250 × 0.500 inch

Type: Heavy Duty Double Lip Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: CRWH1

Construction: Reinforced Metal Case

Lip Design: Main Lip + Dust Lip

Spring Type: Garter Spring

Shaft Diameter (ID): 4.375 inch

Housing Diameter (OD): 6.250 inch

Width: 0.500 inch

Pressure Capability: Up to 0.5 Bar

Lubrication: Oil & Grease

Temperature Range: -40°C to +100°C

Application Class: Heavy Industrial Service

Standard: Inch Size Oil Seal

🔁 Equivalent

Suitable replacement for:

• SKF Heavy Duty Oil Seal
• National Double Lip Oil Seal
• Freudenberg Oil Seal
• NOK TC Oil Seal
• CFW Rotary Shaft Seal
• KACO Oil Seal
• DICHTOMATIK Oil Seal
• Garlock Oil Seal
• Simrit Oil Seal
• OEM Double Lip Oil Seal

(Always verify dimensions, seal profile, and application requirements before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for industrial maintenance, gearbox overhaul, pump repair, mining equipment service, electric motor maintenance, and 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