Single Row Cylindrical Roller Bearings
Single row cylindrical roller bearings feature single set of raceways and rollers. It has two integral roller-guiding flanges on either the inner ring or the outer ring. Therefore, these bearings are axially free floating and separable. The opposing ring may have one integral roller-guiding flange to support axial loads.
In DDR cylindrical roller bearings, the roller-guiding face of the flanges are inclined at an angle to reduce friction between the flanges and the rollers. The rollers feature a crowned profile to prevent high stresses at the edges of the rollers which helps in extending the bearing life.
DDR single row cylindrical roller bearings are available in open and sealed variants in the following dimensional series:
Single Row Cylindrical Roller Bearings - Metric Series
- N
- NU
- NJ
- NUP
- NF
- NCF
- NJG
Single Row Cylindrical Roller Bearings - Inch Series
- CFL
- CFM
- CRL
- CRM
- LLRJ
- LLRM
- XLRJ
DDR single row cylindrical roller bearings are available in the following cage design and material depending on the bearing series and size:

Pressed Steel Cage
One Piece
Pocket-type Polyamide Cage
One Piece
Machined Brass Cage
Two Piece