SKF Nitrile Rubber (NBR) Seal, 25 mm ID, 40 mm OD, 5 mm

This seal is a rotary shaft sealing component designed to prevent fluid or contaminant ingress around rotating shafts in industrial equipment. It uses a resilient elastomeric lip to maintain contact with the shaft surface while accommodating rotation. The product is suitable for Compact assemblies where a low radial profile is required and where material compatibility with common oils and greases is needed.

• Nitrile rubber element provides oil resistance and abrasion protection
• Thin 5mm cross-section enables Compact sealing arrangements
• Low-friction lip reduces heat build-up during continuous rotation
• Robust seal geometry sustains dynamic shaft contact under misalignment
• Consistent radial sealing performance for routine maintenance intervals

• Suitable for bearings and housings in automation systems
• Ideal for drive shafts in electrical motors and gearboxes
• Used with rotary encoders and small electromechanical assemblies
• Can be used for shaft sealing in pneumatic actuators
• Used for shaft protection in general mechanical maintenance tasks

It is intended for shafts with a 25mm nominal running diameter to ensure correct lip contact and sealing performance.

The seal fits into a surrounding bore close to 40mm outer diameter to provide proper radial support during operation.

The lip is MADE from nitrile rubber (NBR), which offers resistance to many oils and greases but may be less suitable for strong polar solvents or sustained exposure to high-temperature fluids.

The 5mm thickness reduces radial space requirements and can be advantageous in low-clearance housings where minimising axial protrusion is necessary.

It can be used as a direct replacement where matching inner and outer diameters and material compatibility are met, making it appropriate for HMSA10 RG seal replacement scenarios.