Correct installation and maintenance of NTN bearings

Source: China Bearing Network Time: 2014-10-31

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Whether the device of NTN bearing in Japan can be correct; affects the accuracy, life and function. Therefore, the device for drawing and assembling part of the bearing should be fully studied. It is expected to be installed according to the operating specifications. The items of the operation specification are usually as follows:
.1), remove the imported bearings and bearing related components. 2), check the dimensions and finishing conditions of the relevant components. 3), equipment. 4), after the installation of NTN bearings. 5), the supply of smoothing agent is expected to be in the line Before the device; just open the imported NTN bearing package. Usually smooth grease is smooth; does not remove; directly fills smooth grease. Smooth oil is smooth; usually does not need to be removed; however; instrument or high-speed NTN bearing; etc.; Clean; remove the anti-rust agent coated on the bearing. Remove the bearing of the anti-rust agent; easy to rust; so can not be placed regardless. Further; the bearing has been sealed with smooth grease;
NTN bearing device method; due to bearing layout, cooperation, conditions; usually; because most of the shaft rotation; so the inner ring demand interference cooperation. Cylindrical hole bearings; multi-use presses; or more hot-packing method. Cone hole Occasionally; directly on the taper shaft; or with a sleeve device.
When the device is to the outer casing; usually the clearance cooperation is more; the outer ring has the interference; it is usually pressed by the press; or there is also the cold shrinking cooperation method of the cooling device. The dry ice is used as the coolant; the cold shrinking cooperation device; the air The moisture in the water will condense on the appearance of the NTN bearing in Japan. Therefore, the appropriate anti-rust method is required.
Removal of imported bearings: When disassembling the NTN bearing for inspection; first record the appearance of the bearing; recognize the residual amount of the smoothing agent; after sampling to see the smoothing agent; wash the bearing. As a scavenger; usually use gasoline, fire oil.
Removal of imported NTN bearings; coarse removal and fine removal; do not leave in the container; first put the metal mesh bottom; make the bearing not directly touch the container dirt. When coarse removal; if the bearing is dirty Rotation of the object; damage to the rolling surface of the bearing; should be paid attention to. In the rough removal of oil; use a brush to remove the smooth grease, adhesive; roughly clean; turn into the fine wash.
Fine washing; the NTN bearing is rotated while removing the oil; while carefully cleaning. Others; cleaning oil should always be kept clean.
Inspection and discrimination of imported bearings: In order to judge whether the undetached bearings can be used; to check after the bearings are cleaned. Check the raceway surface, the rolling surface, the condition of the cooperation surface, the wear condition of the cage, and the bearing clearance. Adding and damage with irrelevant scale accuracy; abnormal. Non-detached small ball bearings; use one hand to support the inner ring horizontal; rotating outer ring to recognize whether it can flow.
Tapered roller bearings, etc., are different from the Japanese NTN bearings; can be viewed from the rolling surface of the roll and outer ring.
Large bearings can not be rotated by hand; pay attention to the appearance of the rolling body, raceway surface, cage, ribs, etc.; the higher the importance of NTN bearings, the more stable it is necessary to view.

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