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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
Brochure English 23/5/02 4:54 pm Page 3TECHNICAL CHARACTERISTICSMATERIAL JIS CODE US CODE STRENGTHCAST IRON JIS G5501 ASTM A48 kgf/cm 2FC20 GRADE 35 20ITEM REFERENCE MATERIALFelt Seal* FI 80% cotton, 20% rayon. Density 0.25g/cm 2Locating ring FR Mild steel AISI1010/AluminiumZF Seal ZF Nitrile Butane Rubber (NBR)U-LOK Seal U500/U600 NBR and steelLabyrinth Seal TS500/600 U Steel/aluminiumV-Ring Seal TSNA500/600 NBR & mild steel (back plate)End cover SN 500/600NA NBR & mild steelEnd cover SNU 500/A NBR & mild steel* Standard on SN HousingRHP PLUMMER BLOCK HOUSINGS AND ACCESSORIES3
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Brochure English

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