Unit Material Handling Bearings


Sealmaster® Material Handling Mounted Ball Bearings

Sealmaster material handling mounted ball bearings feature cast iron housings and an extended inner race insert bearing with nylon retainer. The insert features a rivet to help prevent outer ring rotation and is available with setscrew or SKWEZLOC® concentric locking collar designed for commercial tolerance shafting and optional end cap. The contact seal, with black oxide treated flinger, provides a good balance between contaminant resistance, grease loss and friction. These bearings are available in common unit material handling industry bore sizes and housing configurations.


Unit Material Safety Cap for Sealmaster® Material Handling Bearings

The bearings are designed to accept either a plastic snap in or easy-to-install mechanically fastened metal safety caps. The caps are design to protect users from the exposed rotating shafts, reducing safety hazards around various types of equipment. These safety caps allow users to better conform to OSHA requirements.

Shaft Diameter Size Two Bolt Flange Four Bolt Flange Flange Bracket Pillow Block
1 7/16” 23 SFTMH-23T SFMH-23T FBMH-23T NPMH-23T
1 11/16” 31 SFTMH-31T SFMH-31T FBMH-31T NPMH-31T
2 7/16” 39 N/A SFMH-39T N/A NPMH-39T


Shaft Diameter Setscrew and Old Skwezloc Tolerance Range Skwezloc Upgraded Tolerance Range(Commercial Shafting)
1/2” to 2” +.0000 / -.0005” +.000 / -.003”
2 1/8” to 2 7/16” +.0000 / -.0010” +.000 / -.004”


Bearing Cap 2
Bearing 3
Bearing 2



Sealmaster® USRB Klamploc Adapter Lock Bearings





The Sealmaster unitized spherical roller bearing is now available with the patented1 Klamploc tapered adapter lock. The Klamploc tapered adapter lock design reduces installation complexities versus standard designs and improves clamping force.


USRB Klamploc Table



Shaft Size (Inches) Shaft Tolerance (Inches)
Up to 2” +.000 / -.003 
2 3/16 to 4” +.000 / -.004 
4 7/16” to 5 15/16” +.000 / -.004 









                                   Collar Rotation & Torque
Shaft Size(Inches) Locknut Rotation(Turns) Cap Screw Torque(ft-lbs) Hex Size(Inches)
1 1/8 to 2 1/2” 1/2 to 3/4 Turn 7 5/32
2 11/16 to 3” 1/2 to 3/4 Turn 15 3/16
3 3/16 to 4 1/2” 5/8 to 7/8 Turn 25 1/4
4 15/16 to 5 7/16” 5/8 to 7/8 Turn 40 5/16

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