The CR Oil Seal 2.500x3.194x0.438 CRWH1 NBR is designed for rotary shaft applications requiring lubricant retention around a 2.500-inch shaft within a 3.194-inch housing bore.

The CRWH1 designation is commonly associated with a radial shaft-seal construction incorporating a primary sealing lip and an auxiliary lip for additional contamination protection. The primary lip is typically energized by a garter spring to maintain controlled radial contact against the rotating shaft.

A metal-reinforced case structure is also commonly used in CRWH1-type seals to provide dimensional stability and secure retention within the housing bore. However, the exact case covering, lip geometry, spring arrangement, auxiliary-lip configuration, and installation orientation should be confirmed against the original CR seal or manufacturer drawing.

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 offers good resistance to oil, grease, abrasion, and mechanical wear under normal industrial operating conditions. Compatibility should be verified before use with aggressive chemicals, certain fuels, specialized synthetic fluids, ozone-rich environments, or continuous elevated-temperature service.

The inch dimensions convert approximately to:

Shaft diameter: 2.500 inches or 63.50 mm

Housing diameter: 3.194 inches or approximately 81.13 mm

Seal width: 0.438 inch or approximately 11.13 mm

The 2.500 × 3.194 × 0.438-inch configuration is suitable for medium-size bearing housings, gearboxes, pumps, transmissions, industrial drives, and legacy equipment using an inch-size rotary shaft-sealing arrangement.

⚙️ Applications

• Industrial gearboxes
• Bearing housings
• Industrial pumps
• Mechanical transmissions
• Electric motor assemblies
• Agricultural machinery
• Construction equipment
• Conveyor drive systems
• Legacy industrial machinery
• OEM rotating equipment

🎯 Benefits

✔ Helps retain compatible oil or grease

✔ Auxiliary lip helps reduce contamination ingress

✔ Spring-loaded primary sealing lip

✔ Oil-resistant NBR sealing material

✔ Suitable for 2.500-inch shaft assemblies

✔ Good resistance to abrasion and wear

✔ Metal-reinforced construction commonly used in CRWH1 designs

✔ Suitable for repair and overhaul work

✔ Replacement ready when dimensions and CRWH1 profile match

🧠 Technical Insight

• CR CRWH1 Seal Reference
• Inch-Size Rotary Shaft Seal
• NBR Sealing Material
• Primary Sealing Lip
• Auxiliary Contamination-Exclusion Lip
• Garter-Spring Main Lip
• 63.50 mm Shaft Diameter
• Exact CRWH1 Construction Should Be Verified

✅ Key Features

• CR Industrial Sealing Quality
• CRWH1 Profile Reference
• Oil-Resistant NBR Material
• Spring-Loaded Primary Lip
• Auxiliary Lip Configuration
• 2.500x3.194x0.438 Dimensions
• Industrial Replacement Seal
• Cross-Reference Support Available

📊 Specifications

Brand: CR

Model / Profile: CRWH1

Size: 2.500 × 3.194 × 0.438 inch

Metric Equivalent: Approximately 63.50 × 81.13 × 11.13 mm

Type: Double-Lip Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: CRWH1

Construction: Commonly a metal-reinforced CR radial shaft-seal construction; verify exact CRWH1 series configuration

Lip Design: Commonly a spring-loaded primary sealing lip with an auxiliary secondary lip; verify exact geometry and lip orientation against the original seal

Dust Lip: Commonly incorporates an auxiliary contamination-exclusion lip; verify exact CRWH1 construction

Spring Type: Commonly a garter spring on the primary sealing lip

Shaft Diameter (ID): 2.500 inches / 63.50 mm

Housing Diameter (OD): 3.194 inches / approximately 81.13 mm

Width: 0.438 inch / approximately 11.13 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, shaft-edge condition, housing-bore condition, installation depth, spring side, lip orientation, and concentricity before fitting

Application Class: Medium Industrial Bearing and Rotating Equipment

Standard: Inch-Size Industrial Radial Shaft Seal

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• CR CRWH1 NBR Rotary Shaft Seal
• CR 2.500x3.194x0.438 Oil Seal
• 63.50x81.13x11.13 Rotary Seal
• 2.500-Inch Shaft Oil Seal
• Double-Lip NBR Shaft Seal
• Spring-Loaded Rotary Oil Seal
• Industrial Bearing Housing Seal
• Industrial Gearbox Oil Seal
• Industrial Pump Shaft Seal
• OEM CRWH1 Profile Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original CRWH1 cross-section, primary-lip geometry, auxiliary-lip configuration, lip orientation, case construction, reinforcement arrangement, garter-spring configuration, material compound, installation direction, and operating requirements.

(Always verify dimensions, CRWH1 profile, lip arrangement, spring configuration, shaft finish, housing condition, installation depth, lubricant compatibility, rotational speed, temperature, alignment, 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, industrial pump repair, transmission servicing, motor repair, agricultural-machinery maintenance, construction-equipment repair, conveyor-drive servicing, 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