Sleeve sealing ring Simmerring®

FKMPTFE

Product overview
A radial shaft seal (oil seal) designed to prevent fluid leakage and ingress of contaminants along rotating shafts such as crankshafts and camshafts. Corteco supplies The Simmerring® range meeting OE specifications; as Freudenberg’s aftermarket distributor, Corteco benefits from Freudenberg’s material and manufacturing expertise for consistent OE quality and traceable OE marking (CFW).

New‑generation, energy‑efficient seals
The portfolio includes next‑generation, low‑friction designs engineered to reduce mechanical losses and fuel/oil consumption. Key energy‑saving technologies (ESS®, CASCO) target reduced friction and CO2 emissions while maintaining sealing performance.

Repair tools
Corteco provides dedicated mounting and disassembly tools and optimized repair kits to support workshop efficiency, ensure correct installation and minimize risk of damage during service.

Technology & materials
In‑house elastomer compound development and proprietary mixing facilities allow exact matching to OE material specifications. Advanced compounds (e.g. PTFE + FKM for ESS®) and design options address high‑temperature, heavy‑duty and low‑friction applications.

Product range and key variants
CASCO SEALS

• Part of Freudenberg’s Low Emission Sealing Solutions (LESS).
• Benefit: up to 80% less friction versus conventional solutions.
• Applications: reduced lip wear, lower heat generation, improved power efficiency and reduced CO2 emissions.

CASSETTE SEALS

• Combination of Simmerring® and wear sleeve, suited for heavy machinery (construction, agriculture).
• Protects shafts, engines, transmissions and axles from dirt and water under high‑stress conditions.
• Advanced elastomers can remove need for a spring, lowering friction at elevated temperatures.

COMBI SEAL

• Simmerring® combined with a polyurethane wiper to permit axial and rotary movement while shielding against contaminants.

ESS® ENERGY SAVING SEALS

• PTFE design with FKM (Viton) compound to reduce friction and improve efficiency.
• Targets lower fuel and oil consumption and reduced CO2 emissions.

C‑SEAL COMPOSITE SEALS

• Composite seals with integrated flange for simplified assembly; provide dynamic and static sealing in one component.

CSWS (COMPOSITE SEALS WITH SENSOR)

• Evolution of C‑SEAL with integrated encoder/sensor to communicate rotational data to engine management systems.

ENCODER SEALS

• Combine Simmerring® with an elastomer encoder for speed and rotational angle measurement; integrated sensor supports precise motor control.

Multimedia
Product pages may include demonstration and installation videos illustrating Simmerring® design, installation procedures and variant selection guidance.

Technical specifications / key data

• Brand: Corteco (aftermarket distributor); Freudenberg (original manufacturer)
• Denomination / Model: The Simmerring®
• OE marking: CFW (Carl Freudenberg Weinheim)
• Applications: crankshafts, camshafts, shafts, engines, transmissions, axles; heavy machinery in construction and agriculture
• Materials: in‑house elastomer compounds; PTFE + FKM options for ESS®
• Variants: CASCO, Cassette, Combi, ESS®, C‑SEAL composite, CSWS, Encoder Seals
• Repair support: mounting and disassembly tools; optimized repair kits