Freudenberg Simmerring BA - Radial Shaft Seal

Description

This is a genuine Freudenberg Simmerring BA radial shaft seal, part number 40412095. It is a standard single-lip design with an outer metal case for secure press-fit installation. The integrated spring ensures constant radial force on the shaft, providing a reliable seal against lubricants and contaminants. This component is ideal for rotating shafts in gearboxes, pumps, motors, and other industrial machinery.

Specifications

• Manufacturer: Freudenberg Sealing Technologies
• Product Line: Simmerring
• Design: BA (Standard, metal case, spring-loaded sealing lip)
• Inner Diameter (d1): 250 mm
• Outer Diameter (d2): 280 mm
• Width (b): 15 mm
• Material Compound: 72 NBR 902 (Nitrile Butadiene Rubber)

Label Info

• Article Number: 40412095
• Lot Number: 256511 / 137828191
• Cure Date: 2018-12-11

Application

Designed for sealing rotating shafts in various applications, including power transmission, fluid power, and general machinery. The NBR material is suitable for use with mineral oils, greases, and hydraulic fluids.

Country of Origin

Made in Germany (DE).

CO2 Impact

Choosing this surplus seal over a new one avoids approximately 6.0 kg of CO2 emissions associated with manufacturing and raw material extraction.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

What is the recommended shelf life for a seal made from 72 NBR 902?

According to DIN 7716 / ISO 2230 standards, NBR-based elastomers like 72 NBR 902 typically have a recommended shelf life of 7 years when stored correctly in a cool, dark, and dry environment. This seal, with a cure date of late 2018, is well within its operational lifespan.

Is the Simmerring BA design suitable for pressurized applications?

The standard BA design is primarily for low-pressure or unpressurized sealing applications, typically up to 0.05 MPa (0.5 bar). For applications with higher pressures, a pressure-resistant seal design (like a BABSL) should be considered.

What are the recommended shaft and housing tolerances for this seal?

For a 250mm shaft diameter, an ISO tolerance of h11 is recommended. For the 280mm housing bore, an ISO tolerance of H8 is standard for a secure press-fit. Adhering to these tolerances ensures optimal performance and prevents leaks.

Last Update: Friday, March 13, 2026

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