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Two Bolt Pillow Blocks

2-Bolt Pillow Block (aka Plumber Block) bearing from AST Bearings

Pillow block roller bearing units (also known as plumber block bearings) are mounted bearings and are designed for radial loads acting in the direction of the support surface (as opposed to a 2-bolt or 4-bolt flange unit).

Components of a Typical Pillow Block Bearing

Standard pillow blocks from AST Bearings are made of the following components:

  • Cast Iron Housing
  • Grease Nipple
  • Outer Ring
  • Steel Balls
  • Steel Retainer/Cage
  • Rubber Seals
  • Slinger
  • Wide Inner Ring
  • Set Screws

Other variances are available upon special request such as: type of locking mechanism, self-aligning units, stainless, thermoplastic, and nickel plated mounts, mounts especially designed for HVAC applications, Ceramic Balls (Hybrid Bearings), dust resistant units, heavy duty units and more.

Standard Pillow Block Bearings from AST Bearings

Two Bolt Pillow Blocks - Normal Duty, Wide Inner Ring, Standard Shaft (high) Heights, with Set Screws - Inch and Metric - "UCP" is our product designation for this series.  It is often cross referenced with the following:

  • Sealmaster "NP Series"
  • Dodge "SC Series"
  • Fafnir "YAS Series"

The UCP Series above is what is featured in our interactive online catalog.  However, many other series in inch and metric dimensions are available including:

  • NAP Series (a.k.a. VPE-2 Series, RAS Series, and SXRB Series) - Normal Duty, Wide Inner Ring, with eccentric locking collar.
  • NAPK Series (a.k.a. VPLE-2 Series, RAK Series, and SXRB Series) - Normal Duty, Low Shaft Height, Wide Inner Ring, with eccentric locking collar.
  • SL Series (a.k.a. NPL Series, VAK Series, and SCB Series) - Normal Duty, Low Shaft Height, Wide Inner Ring with set screws.
  • UCP-X Series (a.k.a. MP Series, VPS-3 Series, and SCM-PB Series) - Medium Duty, with set screws.
  • UCP-3 Series - Heavy Duty, with set screws.
  • UCPA-2 Series (a.k.a. "International Style" or UCUP Series, UCPA Series, and CNP Series) - Normal Duty, Tapped Base, with set screws.
  • UCPAN-2 Series (a.k.a. "Domestic Style") - Normal Duty, Tapped Base, with set screws.
  • UCPH-2 Series (a.k.a. UCPH Series and UCHP Series) Normal Duty, with set screws.
  • ALP-2 Series (a.k.a. VPE-1 Series, MS Series, and AELPL Series) - Light Duty, eccentric locking collar.
  • BLP-2 Series (a.k.a. UBS-1 Series, UBLP Series) - Light Duty, with set screws.

How to Select and Order Two-Bolt Pillow Blocks

If you need help in selecting the best products for your particular application, please remember that design engineering and application assistance are available from AST as part of our value-added services designed to make your job easier.

Click here to go to our online catalog and product specifier for 2-bolt pillow blocks including free 3D CAD model downloads.

Pillow Block Catalog & CAD Library

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