SNL plummer (pillow) block housings in the 30, 31, and 32 series, often referred to as “large SNL plummer block housings”, are split housings consisting of a cap and base. They have four holes cast into the base for attachment bolts. The housings are designed on the “building block” principle to enable a wider choice of bearings and seals as well as a variety of shaft-bearing combinations and lubrication methods.
All SKF large-size housings are designed to provide excellent protection for the bearing and are equipped with a range of features that make them easy to install and maintain. They have a split design, which allows for easy access to the bearing for inspection, lubrication, and replacement. The housings also have a four-bolt mounting system, which provides a secure and stable connection to the foundation. Large SNL housing is design to accommodate the following series:
• 30(00) Ho using for bearings in the 30 dimension series.
• 31(00) Ho using for bearings in the 31 dimension series.
• 32(00) Ho using for bearings in the 32 dimension series.
• ..34 to 96 Size code, related to the bearing bore size.
• ../500 to /530 Size code, related to the bearing bore size.
Large SNL housings series are painted black (RAL 9005) using water-based alkyd/acryl paint. The paint protects the housing in accordance with ISO 12944-2, corrosively category C2 (i.e. exterior atmospheres with low levels of pollution, and interior atmospheres where condensation 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 solvent-less rust inhibitor.
Large SNL housings are also available in spheroidal graphite cast iron for applications where extra strength is needed. These housings are supplied with a solid base with the designation SNLD.
SNL plummer (pillow) block housings in the 30, 31, and 32 series are available with different standard sealing solutions:
1. Labyrinth seals (TS ..).
2. Taconite heavy-duty seals (TNF ..).
3. Seals for oil lubrication (TSD .. U).