Simrit 121,8x150x13/12 RWDR-K7 NBR cassette seal

Main description

The Simrit 121,8x150x13/12 RWDR-K7 NBR cassette seal is a heavy duty rotary shaft seal designed for operation in environments exposed to water, mud and severe contamination where standard oil seals are not sufficient.

A cassette seal is an advanced sealing system that integrates multiple sealing elements and protective components into a single compact unit. The RWDR-K7 design creates a closed sealing system that protects both the sealing lip and the shaft surface from direct exposure to water and abrasive particles.

This model is specifically engineered for applications where continuous water exposure, washing processes or harsh environmental conditions are present. The 121,8x150x13/12 mm size is commonly used in industrial machinery, agricultural equipment and heavy duty drive systems requiring reliable long term sealing performance.

By isolating the sealing interface from external contamination, the Simrit RWDR-K7 significantly reduces wear, prevents leakage and extends both seal and shaft life.

Construction and design

The Simrit RWDR-K7 cassette seal is manufactured using NBR elastomer combined with metal reinforcement components forming a fully integrated sealing unit.

The design includes multiple sealing lips and protective barriers that prevent water ingress and contamination. Unlike standard oil seals, the cassette design provides its own running surface, eliminating direct wear on the shaft.

The RWDR-K7 structure is optimized for operation in wet and dirty environments, ensuring consistent sealing performance even under dynamic conditions.

Applications in industrial environments

This cassette seal is widely used in applications where water exposure and contamination are critical challenges.

Typical applications include:
agricultural machinery operating in mud and water
construction equipment and heavy machinery
drive systems exposed to washing processes
axles and gear systems in wet environments
industrial machines working in harsh outdoor conditions

Within the cassette seal category, the RWDR-K7 design is a preferred solution for extreme operating environments.

Technical parameters

Inner diameter: 121,8 mm
Outer diameter: 150 mm
Width: 13/12 mm
Type: cassette seal RWDR-K7
Material: NBR
Brand: Simrit

Operational advantages

excellent resistance to water and contamination
multi stage sealing protection
reduced shaft wear thanks to integrated running surface
extended service life of sealing system
high durability in harsh environments
reliable sealing under dynamic conditions

FAQ

Is the RWDR-K7 cassette seal suitable for water exposure?
Yes, it is specifically designed for applications with continuous water contact.

How does it differ from a standard oil seal?
It features a closed cassette design with multiple sealing elements and protection.

Does it protect the shaft from wear?
Yes, it includes an integrated running surface that reduces shaft damage.

Is it suitable for heavy duty machinery?
Yes, it is widely used in agricultural and construction equipment.