The CR Oil Seal 6.204x7.330x0.500 ALH1 Silicone is designed for industrial rotary shaft applications requiring lubricant retention around a 6.204-inch shaft.

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 other internal rotating components from contamination.

The product is identified by the CR manufacturer designation ALH1. This is a manufacturer-specific profile code and should not be interpreted solely from the letters. The exact cross-section, sealing-lip geometry, number of lips, outside-case construction, internal reinforcement, spring arrangement, auxiliary dust-exclusion feature, lip orientation, and installation direction should be verified against the original seal or technical drawing.

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 across a broad temperature range
• Compatibility with selected oils and greases
• Reliable sealing under suitable shaft-speed conditions

Silicone generally provides lower abrasion, tear, and wear resistance than NBR or FKM. Shaft finish, concentricity, runout, lubrication, rotational speed, and installation quality 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 convert approximately to:

Shaft diameter: 6.204 inches or 157.58 mm

Housing diameter: 7.330 inches or 186.18 mm

Seal width: 0.500 inch or 12.70 mm

The 6.204 × 7.330 × 0.500-inch dimensions make this seal suitable for large industrial bearing housings, gearboxes, pumps, transmissions, process equipment, and legacy machinery using an inch-size rotary shaft-sealing arrangement.

⚙️ Applications

• Industrial gearboxes
• Large bearing housings
• Industrial pumps
• Mechanical transmissions
• Process machinery
• Agricultural machinery
• Construction equipment
• Conveyor drive systems
• 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 6.204-inch shaft assemblies

✔ Suitable for maintenance and overhaul work

✔ Supports temperature-sensitive industrial applications

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• CR ALH1 Seal Reference
• Large Inch-Size Rotary Shaft Seal
• Silicone Rubber VMQ Material
• Broad Temperature Capability
• Radial Shaft-Sealing Function
• Low-Pressure Lubricant Retention
• Approximately 157.58 mm Shaft Diameter
• Exact ALH1 Cross-Section Must Be Verified

✅ Key Features

• CR Industrial Quality
• ALH1 Profile Reference
• Heat-Resistant Silicone Material
• Good Low-Temperature Flexibility
• Inch-Size 6.204x7.330x0.500 Dimensions
• Suitable for Compatible Oil and Grease
• Industrial Replacement Seal
• Cross-Reference Support Available

📊 Specifications

Brand: CR

Model / Profile: ALH1

Size: 6.204 × 7.330 × 0.500 inch

Metric Equivalent: Approximately 157.58 × 186.18 × 12.70 mm

Type: High-Temperature Industrial Rotary Shaft Oil Seal

Material: Silicone Rubber / VMQ

Construction: Manufacturer-Specific ALH1 Reinforced Rotary Shaft-Seal Construction

Lip Design: ALH1 profile; verify the exact geometry against the original seal or technical drawing

Dust Lip: Verify from the actual ALH1 cross-section

Spring Type: Verify from the actual seal construction

Shaft Diameter (ID): 6.204 inches / approximately 157.58 mm

Housing Diameter (OD): 7.330 inches / approximately 186.18 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: Permissible speed depends on shaft diameter, surface finish, lubrication, temperature, alignment, runout, and material compound

Application Class: Temperature-Resistant Industrial Bearing and Rotating Equipment

Standard: Inch-Size Specialized Industrial Seal

🔁 Equivalent

Suitable replacement or cross-reference candidate for compatible:

• CR ALH1 Silicone Rotary Shaft Seal
• CR 6.204x7.330x0.500 Oil Seal
• 157.58x186.18x12.70 Rotary Seal
• 6.204-Inch Shaft Oil Seal
• Inch-Size Silicone Rotary Shaft Seal
• High-Temperature Bearing Housing Seal
• Industrial Gearbox Silicone Seal
• Pump Shaft Silicone Seal
• OEM ALH1 Rotary Seal
• Industrial VMQ Shaft Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original ALH1 cross-section, sealing-lip geometry, lip orientation, outside-case construction, reinforcement arrangement, spring configuration, installation direction, Silicone compound, and operating requirements.

(Always verify dimensions, ALH1-profile geometry, lip direction, 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, large bearing-housing maintenance, industrial pump repair, process-equipment servicing, transmission maintenance, agricultural-machinery repair, 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