The DICHTA Oil Seal 320x360x18 AS NBR is designed for large industrial rotary shaft applications requiring dependable lubricant retention around a 320 mm 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 oil or compatible grease while protecting bearings, gearboxes, pumps, transmissions, and other internal rotating components.

The product is identified by the DICHTA manufacturer designation AS. Because industrial profile codes may differ between manufacturers and production series, the exact sealing-lip geometry, number of lips, outside-diameter construction, metal reinforcement, spring arrangement, auxiliary dust-exclusion feature, and installation direction should be compared with the original seal or technical drawing before replacement.

Manufactured from NBR (Nitrile Butadiene Rubber), the sealing element is generally compatible with:

• 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 standard industrial operating conditions. Compatibility should be confirmed before use with aggressive chemicals, fuels, high continuous temperatures, ozone-rich environments, or specialized synthetic lubricants.

The metric dimensions are:

Shaft diameter: 320 mm

Housing diameter: 360 mm

Seal width: 18 mm

The large 320 mm shaft diameter indicates that this seal is intended for substantial industrial equipment. On large-diameter shafts, correct shaft finish, concentricity, runout, housing alignment, lubrication, and installation technique are particularly important because even small deviations can affect sealing performance and service life.

⚙️ Applications

• Heavy industrial gearboxes
• Large bearing housings
• Industrial pumps
• Mechanical transmissions
• Process machinery
• Rolling and forming equipment
• Mining and quarry machinery
• Conveyor drive systems
• Marine and heavy engineering equipment
• OEM rotating machinery

🎯 Benefits

✔ Helps retain oil or compatible grease

✔ Protects large bearings and rotating components

✔ Oil-resistant NBR sealing material

✔ Suitable for 320 mm shaft assemblies

✔ Heavy-duty metric construction

✔ Good resistance to wear and abrasion

✔ Suitable for maintenance and overhaul work

✔ Supports longer bearing and component life

✔ OEM replacement ready when dimensions and profile match

🧠 Technical Insight

• DICHTA AS Seal Reference
• Large Metric Rotary Shaft Seal
• NBR Sealing Material
• Radial Shaft-Sealing Function
• Low-Pressure Lubricant Retention
• Heavy-Duty Industrial Application
• 320 mm Shaft Diameter
• AS Cross-Section Verification Required

✅ Key Features

• DICHTA Industrial Quality
• AS Profile Reference
• Oil-Resistant NBR Material
• Reinforced Rotary Shaft Construction
• Large 320x360x18 mm Dimensions
• Suitable for Compatible Oil and Grease
• Heavy-Duty Industrial Replacement Seal
• OEM Cross-Reference Ready

📊 Specifications

Brand: DICHTA

Model: AS

Size: 320 × 360 × 18 mm

Type: Large Industrial Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Profile: AS

Construction: Manufacturer-Specific Reinforced Rotary Shaft-Seal Construction

Lip Design: AS profile; verify the exact geometry against the original seal

Dust Lip: Verify from the actual DICHTA AS cross-section

Spring Type: Verify from the actual seal construction

Shaft Diameter (ID): 320 mm

Housing Diameter (OD): 360 mm

Width: 18 mm

Pressure Capability: Low-pressure rotary shaft-sealing service unless otherwise specified

Lubrication: Oil and compatible grease

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

Speed Consideration: Permissible speed depends on shaft diameter, surface finish, lubrication, temperature, alignment, and material compound

Application Class: Heavy-Duty Industrial Bearing and Rotating Equipment

Standard: Large Metric Industrial Seal

🔁 Equivalent

Suitable replacement for compatible:

• DICHTA AS Rotary Shaft Seal
• DICHTA 320x360x18 Oil Seal
• 320x360x18 NBR Oil Seal
• 320 mm Shaft Oil Seal
• Large Metric Rotary Shaft Seal
• Heavy Bearing Housing Seal
• Industrial Gearbox Shaft Seal
• Large Pump Shaft Oil Seal
• OEM AS Shaft Seal
• Heavy-Duty Industrial Rotary Seal

The same dimensions alone do not guarantee interchangeability. The replacement must match the original AS cross-section, lip geometry, lip orientation, outside construction, reinforcement arrangement, spring configuration, installation direction, and material compound.

(Always verify dimensions, AS-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 heavy gearbox overhaul, large bearing-housing maintenance, industrial pump repair, process-machinery servicing, mining-equipment maintenance, conveyor-drive repair, 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