Two-Row Cylindrical Roller Radial Bearings
Double Row or Two Row cylindrical roller bearings are designed for heavy loads that can’t be serviced with a single row bearing. The additional row of rollers allows for the increased radial loads. These bearings are typically metric dimensioned with a machined brass cage. The cage is a one-piece roller riding brass finger cage that promotes smooth rolling. They are industry interchangeable with same size designation. They will be supplied with C3 Internal Radial Clearance unless specified. Bearings with tapered bore, “K” suffix, and P5 clearance can be supplied upon request. Applications include lathes, gearboxes, and pinion stands.
Two-row, or double-row, cylindrical bearings are designed for additional strength in carrying radial loads. These bearing types are interchangeable so the dimensions and diameter under the rollers (NNU style) and diameter over the rollers (NN style) are held to an ISO/DIN standard. Interchangeability is designed for the ring without the rollers to allow interchange with competitor inner rings.
Size range: 80 mm to 2000 mm OD
Design Attributes
Designed to ISO/DIN specified interchangeable dimensions where available.
Sold as complete assembly.
Available in same size range as single row product.
Current designs use NN, NNU nomenclature.
Standard cage design is a drilled pocket, finger-style bronze retainer.
- Dynamic Load Rating C11 TIMKEN NNU40/500MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU40/500MAW33
- Dimension S4 TIMKEN NNU4140MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU4140MAW33
- Chamfer rsmin TIMKEN NNU4172MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU4172MAW33
- Chamfer rsmin TIMKEN NNU4988MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU4988MAW33
- Width B TIMKEN NNU4164MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU4164MAW33
- Geometry Factor Cg2 TIMKEN NNU49/900MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU49/900MAW33
- Dimension S4 TIMKEN NNU4960MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU4960MAW33
- Chamfer r1smin3 TIMKEN NNU49/560MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU49/560MAW33
- DUR/DOR F/E TIMKEN NNU4072MAW33 Two-Row Cylindrical Roller Radial Bearings
- TIMKEN
- NNU4072MAW33