Brochure English

Brochure English 23/5/02 4:53 pm Page 2TECHNICAL CHARACTERISTICSRHP market 3 types of plummer blockunits, the SN, SNU and SD.These are manufactured from highstrength cast iron and can be fitted withspherical roller bearings or self-aligningball bearings.These units are re-greasable; the SNseries may be drilled and tapped toreceive a lubrication nipple on the upperhalf of the housing.The internal sphere of the housing hasbeen designed to H7 tolerance allowingthe bearing to be adjusted easily.Locating rings can be fitted to positionthe bearing. These plummer blockhousings can accommodate differenttypes of seals, varying from the simplefelt seal to the more complex steel andaluminium labyrinth seal.End covers are also available for boththe SN and SNU housings.The SNU series may be fitted with anadditional second threaded hole at thebottom of the casting, this acts as agrease relief valve or oil drain hole.2