The AKRON Gamma Seal RB-35 35x52x4.5 RB NBR is an axial face seal designed primarily for contamination exclusion and secondary protection of bearings and rotary shaft systems.

Unlike a conventional radial oil seal that seals directly against the shaft circumference, a Gamma Seal is normally installed onto the shaft and rotates together with it. The elastomer sealing lip contacts a stationary counterface in the axial direction, creating a protective barrier against external contaminants.

The metal carrier helps maintain structural stability and provides an interference fit on the shaft. The NBR sealing element rotates with the shaft, while the flexible lip runs against the stationary housing surface, bearing face, washer, or other suitable counterface.

This sealing arrangement is commonly used to help exclude:

• Dust
• Dirt
• Mud
• Moisture
• Water splash
• Abrasive particles
• General environmental contamination

The Gamma Seal may be used independently for light contamination-exclusion duties or as an auxiliary seal installed outside a primary radial shaft seal. In a combined arrangement, the Gamma Seal helps protect the main oil seal and bearing system from direct exposure to contamination.

The product is identified as RB-35, with the manufacturer-specific RB Profile. The exact metal-carrier shape, shaft interference, elastomer geometry, lip orientation, counterface position, and axial installation distance should be checked against the original seal or equipment drawing before replacement.

Manufactured from NBR (Nitrile Butadiene Rubber), the sealing element generally offers good resistance to:

• Mineral oils
• Bearing grease
• Petroleum-based lubricants
• Water splash
• Mechanical wear
• General industrial contamination

NBR compatibility should be verified before use with aggressive chemicals, high continuous temperatures, ozone-rich environments, or specialized synthetic lubricants.

The metric dimensions are:

Nominal shaft diameter: 35 mm

Maximum outside diameter: 52 mm

Axial width: 4.5 mm

The compact 35 × 52 × 4.5 mm construction makes this seal suitable for shaft assemblies with limited axial installation space. Correct positioning against the stationary counterface is essential for effective sealing performance.

⚙️ Applications

• Bearing protection systems
• Industrial gearboxes
• Electric motor shafts
• Agricultural machinery
• Construction equipment
• Conveyor rollers
• Wheel and hub assemblies
• Pump and fan shafts
• Power transmission equipment
• OEM rotating machinery

🎯 Benefits

✔ Helps exclude dust, dirt, and moisture

✔ Protects bearings and primary oil seals

✔ Compact axial face-seal construction

✔ Shaft-mounted rotating design

✔ Oil-resistant NBR sealing element

✔ Rigid metal carrier for stable installation

✔ No spring required

✔ Suitable as a primary exclusion or auxiliary seal

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• AKRON Gamma Seal RB-35 Reference
• Axial Face-Sealing Principle
• Shaft-Mounted Rotating Construction
• Metal Carrier + NBR Sealing Lip
• Stationary Counterface Contact
• Non-Pressure Contamination Exclusion
• 35 mm Nominal Shaft Diameter
• RB Profile and Installation Distance Verification Required

✅ Key Features

• AKRON Industrial Quality
• RB-35 Gamma Seal Model
• RB Profile Reference
• NBR Elastomer Sealing Lip
• Rigid Metal Carrier
• Springless Axial Seal Design
• Compact 35x52x4.5 mm Dimensions
• Industrial Replacement Seal

📊 Specifications

Brand: AKRON

Model: RB-35

Size: 35 × 52 × 4.5 mm

Type: Gamma Seal / Axial Face Seal

Material: NBR (Nitrile Butadiene Rubber)

Carrier Material: Metal

Profile: RB

Construction: Shaft-Mounted Metal Carrier with Elastomer Axial Sealing Lip

Operating Principle: Metal carrier and NBR element rotate with the shaft while the lip contacts a stationary counterface axially

Lip Design: Flexible axial-contact elastomer lip

Dust Lip: The axial lip primarily functions as a contamination-exclusion lip

Spring Type: None

Nominal Shaft Diameter: 35 mm

Maximum Outside Diameter: 52 mm

Axial Width: 4.5 mm

Pressure Capability: Non-pressure or low-pressure contamination-exclusion service

Lubrication: Normally operates as an external exclusion seal; compatible grease or lubricant may be present depending on the assembly

Temperature Range: Typically approximately -30°C to +100°C for standard NBR; verify the actual compound and operating conditions

Counterface Requirement: Smooth, stationary, clean, and correctly positioned axial running surface

Application Class: Bearing Protection and External Contamination Exclusion

Standard: Metric Industrial Gamma Seal

🔁 Equivalent

Suitable replacement for compatible:

• AKRON RB-35 Gamma Seal
• 35x52x4.5 Gamma Seal
• RB-35 Axial Face Seal
• 35 mm Shaft Exclusion Seal
• Metal-Carrier NBR Gamma Seal
• Bearing Protection Face Seal
• Auxiliary Rotary Shaft Seal
• Dust and Moisture Exclusion Seal
• Industrial Shaft-Mounted Face Seal
• OEM RB Profile Gamma Seal

The same nominal dimensions alone do not guarantee interchangeability. The replacement must match the original RB profile, shaft interference, metal-carrier geometry, lip orientation, maximum outside diameter, counterface position, and axial installation distance.

(Always verify dimensions, RB-profile geometry, shaft fit, carrier orientation, counterface condition, installation distance, rotational speed, temperature, lubricant exposure, and operating environment before ordering.)

📦 Availability

✅ In Stock

🚚 Fast Delivery Available

🌎 Worldwide Shipping Available

📦 MOQ: 1 Piece

🏭 Suitable for bearing protection, gearbox maintenance, electric motor servicing, agricultural machinery repair, construction-equipment maintenance, conveyor systems, 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