China wholesale Nj219 - Four-row Cylindrical Roller Bearings – Chengfeng Bearing

Features

Four-row cylindrical roller bearings can withstand large radial loads and impact loads, but cannot withstand axial forces. They have high machining accuracy and are suitable for high-speed operation. Since the inner ring has no ribs, the inner and outer ring components can be installed separately.
This type of bearing facilitates frequent replacement of various types of rolls and can be used in various cold and hot rolling mills. Due to its advantages of large radial bearing capacity, high rotation accuracy, and convenient installation and disassembly, it is the first choice for various types of rolling mill roll bearings.
After the inner ring is pressed into the roll diameter, the inner ring raceway surface and the roller surface can be ground at the same time, which is beneficial to improve the rolling precision, and the installation clearance of the bearing can be adjusted freely.
FC: double outer ring, single inner ring, inner ring without ribs
FCD: double outer ring, double inner ring, inner ring without ribs
FCDP: double outer ring, the outer ring has only one middle rib but a flat rib, double inner ring, the inner ring has no rib.

Applications

This type of bearing is mainly used on work rolls or backup rolls of cold and hot rolling mills, blanking machines and other machines, and can also be used in other equipment.

Four row cylindrical roller bearings:
Inner diameter size range: 90mm~1480mm
Outer diameter size range: 140mm~1850mm
Width size range: 70mm~1100mm
Tolerance: The product accuracy has ordinary grade, P6 grade, P5 grade, and P4 grade products can also be processed if the user has special requirements.
Radial clearance
The standard product of four-row cylindrical roller bearing has 3 sets of clearance, and other clearance groups are also available.
Bearings with radial clearance larger or smaller than the standard value can also be produced according to user requirements.
cage
The four-row cylindrical roller bearing mainly adopts the car-made brass cage, and the car-made solid strut cage should be used for the larger size.
Supplementary code:
D split bearing.
DR two-row split bearing paired use
E Internal design changes, reinforced structure. (The size of the raceway conforms to the current national standard (enhanced type), the diameter of the roller,
The length is increased compared to the non-reinforced type. )
FC…ZW four-row cylindrical roller bearing, single inner ring, double outer ring with double ribs, two rows of rollers are close together.
J steel plate stamping cage, additional numerical difference when the material is changed.
JA Steel sheet stamping cage, outer ring guide.
JE phosphated unhardened steel stamping cage.
K taper bore bearing, taper 1:12.
K30 tapered bore bearing, taper 1:30.
MA brass solid cage, outer ring guide.
MB Brass solid cage, inner ring guided.
There are snap grooves on the outer ring of the N bearing.
NB Narrow inner ring bearings.
NB1 narrow inner ring bearing, one side narrow.
NC narrow outer ring bearing.
NR bearings have snap grooves and snap rings on the outer ring.
The N1 bearing outer ring has a locating notch.
The N2 bearing outer ring has two or more symmetrical positioning notches.
Q Bronze solid cage with additional numbers for different materials.
/QR Combination of four cylindrical roller bearings, the radial load is evenly distributed
The outer ring of the R bearing has a stop rib (flange outer ring).
-RS bearing with skeleton rubber seal on one side
2RS Bearings with RS seals on both sides.
-RSZ bearing has a skeleton rubber seal (contact type) on one side and a dust cover on the other side.
-RZ bearing has a skeleton rubber seal on one side (non-contact type).
-2RZ Bearings with RZ seals on both sides.
VB Shaker Bearings.
WB wide inner ring bearing (double-sided wide).
WB1 wide inner ring bearing (single side width).
WC wide outer ring bearing.
X flat retaining ring roller full complement cylindrical roller bearing.
X1 outer diameter is non-standard.
X2 width (height) is non-standard.
X3 outer diameter, width (height) non-standard (standard inner diameter).
-Z bearing has a dust cover on one side.
-2Z bearing with dust cover on both sides