chrome steel housing bearings sn513

chrome steel housing bearings sn513

Pillow blocks are usually referred to the housings which have a bearing fitted into them and thus the user need not purchase the bearings separately. Pillow blocks are usually mounted in cleaner environments and generally are meant for lesser loads of general industry. These differ from "plummer blocks" which are bearing housings supplied without any bearings and are usually meant for higher load ratings and corrosive industrial environments. However the terms pillow block and plummer block are used interchangeably in certain parts of the world.

Standard duty stainless steel pillow block bearing with a wide inner ring and two set screws. Stainless steel housing with grease fitting.

Bearing Types

Pillow block bearings are constructed of a housing and a bearing. Many pillow blocks have a replaceable bearing, referred to as an insert bearing. Bearings used with pillow block housings usually are self- aligning to compensate for angular misalignments. Pillow blocks are available with many different bearing types, including:

• Plain bearings are used to constrain, guide, or reduce friction in linear applications. They use a sliding action instead of the rolling action used by ball, roller, and needle bearings. Plain bearings can be constructed of a variety of materials, but are typically bronze, a graphite-metal allow, or plastic. Metal plain pillow block bearings must be lubricated properly to reduce wear and friction. Bronze plain bearings may also be either impregnated with oil or self-lubricating.
• Ball bearings  have a ball as the rolling element. They are used to provide smooth, low friction motion in rotary applications. Construction consists of an inner and outer ring, balls, and usually a cage or ball separator. Ball pillow block bearings feature an inner and outer ring and balls. They may be equipped with a cage or ball separator.
• Roller bearings have a roller as the rolling element.  They are used to provide smooth, low friction motion in rotary applications.  Construction consists of an inner and outer ring, rollers, and usually a cage or roller separator.  There are three principal types of roller bearings used in pillow blocks:
  • Tapered-roller bearings use conical rollers that run on conical races. They can support both radial and axial loads as well as carry higher loads than ball bearings due to having greater contact area. Tapered-roller bearings contain an inner ring (cone), an outer ring (cup), a cage, and rollers. They have high radial and axial load capacities when used at low to intermediate speed levels. The thrust level of tapered-roller pillow block bearings is about 60% of the radial capacity. They are usually more expensive.

  • Spherical- roller bearings are self-aligning, double-row, combination radial and thrust bearings. The rolling element in these pillow block bearings has a crowned or spherical shape. Spherical-roller pillow block bearings are superior when dealing with high loads and loads that require tolerance to shock; however, they have limited speed capabilities.

  • Cylindrical-roller bearings are bearings with high radial capacities and moderate thrust loads. They can be crowned or end-relieved for reduced-stress concentrations. Cylindrical-roller pillow block bearings produce low friction and allow for high-speed.

SN200 Series: SN205-232

SN300 Series: SN305-332

SN500 Series: SN505-532

SN600 Series: SN605-632

SSN3000 Series: SSN3024-3038

SSN3100 Series: SSN3122-3132

SNU500 Series: SNU505-532

chrome steel housing bearings sn513 pictures: