RWDR-KASSETTE 178x208x16/18 NBR GRN®

Applications

The RWDR-KASSETTE 178x208x16/18 NBR GRN® oil seal is designed for heavy-duty rotary shaft systems exposed to dirt, moisture, abrasive contaminants, and fluctuating operating loads. It is commonly used in agricultural machinery, construction equipment, wheel hub assemblies, industrial gearboxes, powertrain systems, and off-road drivetrain components. The cassette-style sealing structure provides enhanced protection in environments where conventional radial shaft seals are insufficient.

Advantages

The cassette construction integrates multiple sealing lips and an internal grease retention chamber, forming a stable lubrication barrier that reduces friction and slows wear on the shaft surface. The multi-lip arrangement significantly improves contamination exclusion, protecting bearings from dust, mud, water, and particulate ingress. NBR (Nitrile Rubber) provides reliable compatibility with mineral oils, greases, and standard hydraulic transmission fluids. The rigid outer casing ensures dimensional stability and straightforward installation while maintaining uniform sealing performance, even under mild misalignment or vibration conditions. As a result, equipment downtime is reduced, maintenance intervals are extended, and long-term operating costs are optimized.

Technical Data

• Type: RWDR-KASSETTE / Cassette Shaft Seal
• Dimensions: 178x208x16/18 mm
• Sealing Material: NBR (Nitrile Rubber)
• Fluid Compatibility: Mineral oils, lubricating greases, hydraulic fluids
• Typical Temperature Range: approx. -30°C to +100°C (depending on medium and load conditions)
• Operating Environment: High contamination, outdoor exposure, variable mechanical load and vibration

Main Description

The GRN® RWDR-KASSETTE 178x208x16/18 NBR is a high-performance radial rotary shaft seal engineered for demanding industrial and off-road machinery applications. Unlike standard single-lip or double-lip shaft seals, the cassette configuration incorporates a multi-stage sealing system with a protected lubrication chamber. This design maintains an optimal oil film on the shaft and prevents contaminants from reaching the bearing assemblies, even in harsh environments where external contaminants are frequent and unavoidable.

NBR as the sealing elastomer provides proven performance when exposed to gear oils, hydraulic oils, and grease-based lubrication systems commonly used in drivetrain and transmission components. The seal’s compact, rigid housing supports stable alignment and reduces wear caused by shaft irregularities or equipment vibration, helping extend system service life.

This RWDR-KASSETTE model is well-suited for tractors, loaders, harvesters, forestry machinery, wheel hub assemblies, and other heavy-duty mechanical equipment exposed to mud, water spray, and dust. Its robust construction contributes to long maintenance intervals, reduced service downtime, and dependable long-term performance under challenging working conditions. It is an ideal choice for both OEM manufacturing and maintenance operations requiring durable industrial sealing solutions.

FAQ

1. Why choose a RWDR-KASSETTE seal instead of a standard shaft seal?
The cassette design provides superior contamination exclusion and lubrication stability, extending seal and bearing life.

2. Is NBR resistant to hydraulic and gear oils?
Yes. NBR has excellent compatibility with mineral oils, greases, and widely used hydraulic transmission fluids.

3. In which environments is this seal recommended?
Outdoor, high-contamination conditions such as agriculture, construction, mining, and heavy-duty industrial equipment.

4. Does installation require special equipment?
No special tools are typically required, but proper alignment and clean installation surfaces are essential.