CHINA EAST TRADING CO.,LIMITED
CHINA EAST TRADING CO.,LIMITED have been integrated manufacturer and exporter all kinds of bearings since 2009. More than 10years exported experience to get a rich experience to provide different
Add to Cart
High Precision Low Noise NN3019 NN3020K Double Row Cylindrical Roller Bearing
Description,
In the application of machine tool spindles, double-row precision cylindrical roller bearings
are also used, usually combined with precision angular contact ball bearings or thrust bearings.
These bearings can withstand large radial loads and allow higher speeds. The two rows of rollers
in a metal-machined online bearing are arranged in a crossed manner, and the frequency of fluctuation
during rotation is significantly higher than that of a single row bearing, and the amplitude is reduced by
60% -70%. This type of bearing usually has two forms: NN30, NN30K two series of bearings with flanges
on the inner ring, the outer ring can be separated; NNU49, NNU49K two series of bearings with flanges
on the outer ring, the inner ring can be separated, of which NN30K and NNU49K series The inner ring is
a tapered hole (taper 1:12), which cooperates with the tapered journal of the main shaft. Moving the inner
ring axially can expand the inner ring, so that the bearing clearance can be reduced or even the bearing can
be pre-tensioned (negative clearance). status). Cylindrical bore bearings usually use hot-fitting, using
interference fit to reduce bearing clearance, or pre-tensioning the bearing. For NNU49 series bearings
with separable inner ring, the raceway is usually finished after the main shaft is mounted on the inner
ring to improve the rotation accuracy of the main shaft.
SKF cylindrical roller bearing, Specifications,
| Product name | High Precision Low Noise NN3019 NN3020K Double Row Cylindrical Roller Bearing |
| Material | Chrome steel or stainless steel |
| Cage | Brass, steel |
| Lubrication | Oil Grease or solid grease |
| Bore Dia. | 100MM |
| O.D. | 150MM |
| Width | 39MM |
| Package | Netural package or according to requirememt |
| Sample time | 3--7 days |
| Production time | It depends on the quantity |
Series: Cylindrical Roller Bearing
Model: bearing NN3018
Inner diameter: 90 mm
Outer diameter: 140 mm
Thickness: 37 mm
Old model: 3282118
New model: NN 3018 bearing
Type: Double-row cylindrical roller bearing (NN type)
Series: Cylindrical Roller Bearing
Model: bearing NN3020
Inner diameter: 100 mm
Outer diameter: 150 mm
Thickness: 37 mm
Old model: 3282120
New model: NN 3020 bearing
Type: Double-row cylindrical roller bearing (NN type)
If you need bearing price list, welcome contact us.