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RFB Series 4-Bolt Flange Unit

Item #100000368
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Product details

  • Heavy-Duty 4-Bolt Flange
  • 2 15/16" Shaft
  • Cast Iron Housing
  • Felt Seals
  • Double Concentric Clamp Collars


  • Toughest application conditions
  • Demanding environments


  • Seals are felt standard; contact seal denoted by "C" in the part number
  • Compact size
  • Unitized, self-aligning, replaceable cartridge inserts
  • Durable, cast iron split housing
  • Quickest replacement of bearing insert
  • Housing always remains aligned with the shaft
  • Reduced downtime and replacement cost
  • Guide pins ensure proper orientation of the top housing
  • Timken tapered roller bearings
  • One-piece, spherical outer race
  • 52100 high quality bearing steel
  • Alignment pin prevents outer race rotation of the cartridge insert
  • Positive lubrication system
  • Patented felt labyrinth race mounted seals
  • Single-lip, race-mounted contact seals
  • Concentric, double-locking collars


Inch/Metric Inch
Flange Type 4-Bolt Flange
Shaft Dia. 2 15/16 in
Mounted Unit Duty Heavy-Duty
Bearing Type Tapered Roller Bearing
Locking Device Double Concentric Clamp Collars
Housing Length 7 3/4 in
Bolt Hole Spacing 6 in
Bearing Design Non-Expansion
End Type Open End
Seal Type Felt Seals
Housing Construction 2 Piece
Housing Material Cast Iron
Lubrication Relubricatable
Flange Thickness 1 5/8 in
Collar O.D. 4 3/4 in
Bolt Hole Size 3/4 in
Bolt Size 3/4 in
RPM [MAX] 1750 rpm
Housing Width 3 15/16 in
Temperature Range [MAX] 250 °F
Overall Width 4 11/16 in
Housing Height 7 3/4 in
Style 4-Bolt Flange
Duty Heavy-Duty
Weight 0.0 LB
Package Quantity 1.0 Piece
EAN or UPC 662288480341

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