Page 199 - SKF-bearing-housings

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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