SKF HMSA10 RG Radial Shaft Seal

SKF HMSA10 RG 115X140X12 radial shaft seal is a metric oil seal designed to contain lubricants and exclude contaminants at the interface between a rotating shaft and a stationary housing. The RG suffix indicates a design variant with a rubber outer diameter, while HMSA10 is the seal family for this size range; the sealing lip is constructed from nitrile rubber (NBR). This particular size, 115 x 140 x 12 mm, corresponds to a 115 mm shaft diameter, a 140 mm housing bore, and a 12 mm overall width, making it suitable for mid- to large-bore machinery where a reliable elastomer lip seal is required. The NBR lip provides compatibility with common mineral oils and many industrial lubricants, delivering sealing performance under typical mechanical loads and rotation. Radial shaft seals of this type are used between rotating shafts and stationary components to prevent oil leaks while accommodating relative motion, and the HMSA10 RG variant is designed to meet SKF’s precise geometry for this size to ensure proper fit and sealing force when replacing worn seals in compatible equipment.