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Pillow blocks, the most commonly used type of mounted units, provide shaft support where the mounting surface is parallel to the shaft axis. The bolt holes are usually slotted for easy adjustment during mounting.

Pillow blocks come in a variety of configurations.

  • Narrow series (V and S) are lightweight, yet structurally designed to support bearing load.
  • Premium width series (R and Y) are three times stronger for rougher environments. They’re available in two styles that fit typical applications.
  • Pressed steel and rubber pillow blocks are available for light-duty applications.

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Unit of Measure

Key Dimensions

Series

N/A Medium-Duty

Shaft Size d

N/A 3.1875 in

Bearing Type 

N/A Ball Bearing

Bearing Number

N/A GN303KRRB

Seal Type

N/A Shroud Seal

Housing Construction

N/A Two-Bolt Pillow Block

Alternate Part Name

N/A RSAO3 3/16

Other Dimensions

Base to Center Height H

N/A 115.89 mm4.563 in

Total Length L

N/A 390.5 mm15.374 in

Total Width A

N/A 111.1 mm4.374 in

Bolt Hole Spacing J

N/A 314.3 mm12.374 in

Bolt Hole Width N

N/A 25.4 mm1 in

Bolt Hole Length N1

N/A 44.4 mm1.748 in

Foot Height H1

N/A 49.2 mm

Total Height H2

N/A 223 mm8.78 in

Dimension d1

N/A 119.1 mm4.689 in

Dimension B1

N/A 106.4 mm4.189 in

Dimension S1

N/A 65.9 mm2.594 in

Dimension T

N/A 55.6 mm2.189 in

Ratings

Static Load Rating

N/A 86500 N19400 lbf

Dynamic Load Rating

N/A 136300 N30700 lbf