Page 199 - SKF-bearing-housings
P. 199

Standard housing design


                                        Fig. 5  Housing material
            Dimples indicate positions for accessories  SNL plummer block housings are made of grey
                                               cast iron.
                                               Paint, corrosion protection
                                               SNL housings are painted black (RAL 9005)
                                               using a water based alkyd/acryl paint. The
                                               paint protects the housing in accord ance with
                                               ISO 12944-2, corrosivity category C2 (i.e.
                                               exterior atmospheres with low level of pollu-  5
                                               tion, interior atmospheres where condensa-
                                               tion may occur). The paint is not affected by
                                               most lubricating or engine oils, cutting fluids
                                               or alkalescent washing chemicals.   Housings
                                               can be repainted with most water or solvent
                                               based 1- or 2-component paints.
                                                Unpainted surfaces are protected by a
                                                 solventless rust inhibitor.
                                        Fig. 6
            Cast indications mark the centre of the housing bore
                                               Dimension standards
                                               Where applicable, boundary dimensions are in
                                               accordance with ISO 113 for four-bolt plummer
                                               block housings. ISO 113 applies to housings
                                               with a bearing seat diameter D a  ≤ 540 mm.
                                               Interchangeability
                                               SNL plummer block housings in the 31 series
                                               are dimensionally interchangeable with the
                                               earlier SD housings.
                                                SNL housings in the 30 and 32 series are
                                               dimensionally interchangeable with the earlier
                                               SD housings, except for the bearing position.
                                               The offset of the bearing centre compared to
                                               the centre of the housing differs (dimension s,
                                               † product tables).





















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