NN3018KR Double Row Cylindrical Roller Bearings NN3018 NN3018K 90*140*37mm

Product Specification

NN3018KR Double Row Cylindrical Roller Bearing NN3018 NN3018K 90*140*37mm

What is a precision cylindrical roller bearing?

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.

You should know

1. Directly factory price, more than 30,0000 designs of bearings to reazile one-stop service.

2. NO MOQ, supporting sample purchase.

3. If you deal with us, you will enjoy less deposit, and hot promotion.

4. Less deposit is ok

Specifications

Cylindrical roller bearing bearing characteristics?

Cylindrical roller bearings are separate bearings, which are very convenient to install and disassemble. Cylindrical roller bearings are divided into single, double and four rows.
Cylindrical roller bearings can be divided into single-row, double-row and multi-row cylindrical roller bearings according to the number of rows of rolling elements used in sunthai bearings. Among them, the single-row cylindrical roller bearing with a cage is used more often. In addition, there are other structures such as single-row or double-row full complement cylindrical roller bearings.
Sunthai single-row cylindrical roller bearings are divided into N-type, NU-type, NJ-type, NF-type and NUP-type according to the different ring flanges. Cylindrical roller bearings have a large radial load capacity. Depending on the structure of the ring flange, it can also bear certain unidirectional or bidirectional axial loads.
NN and NNU type double row cylindrical roller bearings are compact in structure, strong in rigidity, large in load capacity, and small in deformation after loading. They are mostly used to support the spindle of machine tools. FC, FCD, FCDP four-row cylindrical roller bearings can withstand large radial loads, and are mostly used on heavy machinery such as rolling mills.
Sunthai cylindrical roller bearings are mainly used in motors, machine tools, petroleum, rolling mill handling machinery and various industrial machinery.

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Package and Shipment

Packing:

1: tube package+outer caton+pallets

2: single box+outer carrton+pallet

RFQ

1. Do you support less deposit?

Yes, we accept. Becaue quality is our culture. Never worry the balance payment.

2. How is your service?

Every step is going of the order, there will be one to inform you for each, to make sure you know the order in well.