Double-row Full Complement Roller Bearings
Double row full complement cylindrical roller bearings are all supplied with a lubrication groove with holes in the outer ring, which enables full lubrication access into the rolling space of each row of cylindrical rollers. The inner ring of the NNC, NNCL, and NNCF design has three guiding flanges to ensure the guiding accuracy of cylindrical rollers. They differentiate by the number of guiding flanges and snap rings in the outer ring. These components stop the rolling elements from falling out. Double row full complement cylindrical roller bearings are available as non-locating, semi-locating, and locating bearings.
Comparison Table of Double-row Full Complement Cylindrical Roller Bearing
INA Type Code | SKF Type Code | Characteristic | Example |
SL0148xx | NNC48xx | Locating bearing, Double-row, Dimension Series 48 | SL014848=NNC4848 |
SL0149xx | NNC49xx | Locating bearing, Double-row, Dimension Series 49 | SL014918=NNC4918 |
SL1850xx | NNCF50xx | Half-locating bearing, Double-row, Dimension Series 50 | SL185028=NNCF5028 |
SL0248xx | NNCL48xx | Non-locating bearing, Double-row, Dimension Series 48 | SL024832=NNCL4832 |
SL0249xx | NNCL49xx | Non-locating bearing, Double-row, Dimension Series 49 | SL024936=NNCL4936 |
SL04..-PP | NNF..PP | Locating bearing, Double-row, with a ring groove | SL04130=NNF130 |
SL0450..-pp | NNF50..pp | Locating bearing, Double-row, Dimension Series 50 | SL045032=NNF5032 |
NNF series: Equivalent INA type SL04 series 
- Technical characteristics:
Locating bearing.
Compact design
Maximum load-carrying capacity
Sealed on both sides
Suitable for low and medium speeds
Capable to support axial forces in both directions and tilting moments
Lubrication holes in outer and inner rings
- Applications: rope wheels and pulleys
NNC series: Equivalent INA type SL01 series 
- Technical characteristics:
Locating bearing
Open type - without seals
Inner ring with 3 fixed flanges
Two outer rings with internal flange
An oil groove and holes in the outer ring
- Applications: reducer, pipe rolling machine transmission parts, hydraulic pump, gear pump, etc.
NNCF series: Equivalent INA type SL1850 series
- Technical characteristics: 
Semi-locating bearing.
Open type - without seals
Can support radial & axial forces in one direction,
Single outer ring with one flange.
Outer ring located with one snap ring.
Inner ring with 3 flanges.
An oil groove and holes in the outer ring.
- Applications: reducer, the transmission part of pipe coiler, hydraulic pump, gear pump, etc.
NNCL series: Equivalent INA type SL02 series 
- Technical characteristics:
Non-locating bearing
Single outer ring without flange.
Outer ring located with a central snap ring.
Inner ring with 3 flanges.
An oil groove and holes in the outer ring
- Application: Rope sheaves, Pulley
UNNC and UNNCL series: Equivalent INA type SL05 and SL06 series
- The outer ring’s outer diameter is in a spherical shape.
- Single outer ring with flange.
- Split inner ring
- An oil groove and holes in the outer ring
- SL05 series is locating bearing
- SL06 series is Non locating bearing
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