How to choose NTN ucf bearing type?

3,001 Published by admin1 Oct 13,2021

The first is the constraint of scale.
Usually the space in which NTN ucf bearings can be installed is constrained. In most cases, the shaft diameter (or bearing inner diameter) is based on mechanical planning or other planning constraints. Therefore, the selection of bearing type and size is determined according to the inner diameter of the bearing. As a result, the main standard tables for standard NTN ucf bearings are compiled according to the international standard inner diameter standard.

Secondly, the speed.
The allowable speed is confirmed based on the NTN ucf bearing type, size, accuracy, cage type, load, smoothing method, and cooling method. The bearing table lists the allowable speed of the standard precision bearing under oil smoothness and grease smoothness. Generally, deep groove ball bearings, active self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operations.

NTN ucf bearing

Once again, NTN ucf Bearing Service.
NTN ucf bearing standard accuracy and rotation accuracy are based on specifications. Regarding machinery requiring high precision and high-speed operation, it is advisable to use bearings with accuracy grade 5 or above. Deep groove ball bearings, radial thrust ball bearings or cylindrical roller bearings are suitable for machinery with high operating accuracy. Rigidity, when the contact surface of the rolling body and raceway of the bearing is compressed, elastic deformation will occur. Some mechanical requirements minimize elastic deformation. Roller bearings have less elastic deformation than ball bearings.

(1) Before the NTN bearing device, you should use appropriate measuring tools to check the processing quality of the shaft, seat hole and related parts (such as dimensional accuracy, shape accuracy and surface roughness, etc.) according to the skill requirements on the planning drawings.

NTN ucf bearing

(2) If there are bumps, burrs, rust spots or solid particles (such as abrasive debris, sand, soil) on the surface of the shaft and the bearing seat hole, it will not only make the bearing device difficult and make the device position incorrect, but also solid If particles fall into the NTN bearing, it will have a grinding effect. When the NTN bearing rotates, it will grind or scratch the working surface of the NTN bearing. Therefore, it must be carefully checked before the installation. If the above defects are found, they should be corrected. For example, use an oil file to remove burrs, raised bumps, and rust spots, and polish with a fine emery cloth. Another example is to clean solid particles and dirt.

(3) The surface of the device should be cleaned with clean gasoline, kerosene, toluene or xylene and other solutions, and wiped dry with a clean cloth, and then coated with a thin layer of smooth oil, which will make the operation of the device more convenient.

(4) Open the bearing package just before installation, immerse it in the above-mentioned gasoline and other liquid and rotate it gently by hand. Make sure that the cage, the rolling body and the encapsulated oil on the surface of the raceway are thoroughly cleaned.

high precision NTN ucf bearing

(5) When cleaning a large number of NTN bearings, first use hot engine oil at a temperature of 90-100℃ to melt the encapsulating oil. At the same time, use a seamless and chip-free tool to dig out all the old oil, and then rinse for a few minutes , And then rinse with kerosene to remove the engine oil, and finally clean it again with gasoline. After cleaning, wear film gloves and put the bearing on a clean cloth or paper on the workbench to dry.

(6) Note that the sealed bearing cannot be cleaned by this method, and the inside of the seal should be kept intact and cannot be cleaned.

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