Ball Bearing Units

Overview

Bearing Units

NSK ball bearing units combine a bearing, housing, and sealing components into a standardized form used in the key parts of equipment. They are versatile and easy to use.

 

Using a ball bearing unit simplifies the surrounding structure and makes mounting and maintenance more efficient. As they provide the proper alignment, bearing units help prevent moment loads caused by mounting error. Bearing units can also be easily mounted on the machine base or side walls so they can be used in all kinds of places, including frame structures.

 

With their impressive features, applications for bearing units are expanding daily, and NSK's wide range of ball bearing units continues to meet performance needs across operating environments.


Product List

Pillow Blocks

Pillow blocks (plummer blocks) are the most common type of bearing unit. The complete units feature a bearing mounted in a simple, rigid housing. They are extensively used in a range of transmission equipment and general machinery.

Features

  • Customizable bearing housing materials
    In addition to gray cast iron standard materials, spheroidal graphite iron (ductile cast iron), general rolled steel, and stainless steel options are available.
  • Various housing types
    Choose from a wide assortment of housing shapes and sizes.

Applications

  • Roll support
  • Transport/conveyance equipment
Square Flanged Units

These bearing housings have a square flange which can be easily attached to a machine with four bolts.
With a simple mounting face, square flanged units are widely used.

Features

  • Customizable bearing housing materials
    In addition to gray cast iron standard materials, spheroidal graphite iron (ductile cast iron), general rolled steel, and stainless steel options are available.
  • Various housing types
    Choose from a wide assortment of housing shapes and sizes.

Applications

  • Roll support
  • Transport/conveyance equipment
Oval Flanged Units

These units feature a bearing housing with a diamond-shaped flange for easy mounting to the machine base or side wall with two bolts. They are ideal for applications where mounting space and the distance between shafts is small. Often, the spacing between bolt holes is equal to the diagonal positioning of square-flange types.

Features

  • Customizable bearing housing materials
    In addition to gray cast iron standard materials, spheroidal graphite iron (ductile cast iron), general rolled steel, and stainless steel options are available.
  • Various housing types
    Choose from a wide assortment of housing shapes and sizes.

Applications

  • Roll support
  • Transport/conveyance equipment
Ball Bearings: Set Screw Type

Set screw ball bearings are specially designed for bearing units and come in a range of models depending on the mounting.

(For more details, see NSK's Ball Bearing Units catalog and handbook.)

Features

  • Mounting methods that suit your application
    Choose from set screws, adapters (tapered inner ring bores), eccentric locking collars, or specialized fits for mounting.
  • Multiple designs for the outside diameter of the outer ring
    Available in a range of bearing types with spherical or straight outer ring outside diameters.

Applications

  • Wide applications
    Used in the ball bearing units above, set screw bearings offer proven performance in roll spports, transport equipment, and more.

 


FAQs

 

answersWe provide a list of which NSK products correspond to other manufacturer's units.
Please see the comparison tables listed in our catalogs for details.

Catalogs


Industry Applications