General Bearing Appearance characteristics:Roller diameter and length of rolling are small. Cage with roller or inner guidance. Cylindrical roller bearing cage structure with rivets, easy to loose, off cover. Aligning bearing diameter hole without bunkers, poor lubrication.Material:Inside and outside the ring and rolling the ordinary bearing steel. Of zinc brass cage materials, low strength, poor flexibility.

1: ntn bearing cleaning focus:1, cleaning the surface of the object stateSmooth surfaces and rough uneven surfaces cleaned the same way, the effect achieved is very different. In the choice of cleaning method should fully take into account the surface conditions.2, the situation of dirtDirt to be used for different a different cleaning agent for metal surface with oil-based dirt and to scale, oxide-based dirt the selected cleaning agent

Identification of the Quality of the sound description:Irregular use of hearing to identify the operation is a very common method. For example: With the electronic stethoscope to check does not feel a part of the normal noise often experienced operators to use the method.ntn bearings are well connected to the switch if the state will issue a muffled whining sound. If issued a sharp hissing sound,

1: ntn bearing support seal:ntn bearing support sealing means bearing external, such as ntn bearing shell parts, shaft parts, and cover part of the additional sealing devices.Bearing seals in the choice of bearings should be considered when the bearing lubricant type (fat or oil), sealing contact with the surface of the circular speed, bearing misalignment, and many other factors.

ntn bearing angular contact ball bearings is mainly used in machine tool spindle. In most cases, locking the outer ring of this bearing the mouth and can not seal the resulting circular groove, so many used in the machine spindle angular contact ball bearings can not be used for other hosts as the other bearings as lubrication.If installing a set of auxiliary lubrication system, not only to increase costs and make the structure more complex machine.

 ntn bearing lubrication methods introduced 41, oil ring lubrication: lubrication only way for the horizontal axis. By hanging in the shaft and can rotate the ring to the oil pool oil into the bearing. Applicable to medium-speed shaft diameter greater than 50mm and high-speed bearings. Oil ring preferably seamless, bearing wide-diameter ratio less than 2, may use only one oil ring, Otherwise required two oil ring.

1: ntn bearing the international standards:China Bearing Industrial Association (CBIA)American Bearing Manufacturers Association (ABMA)American National Standards Institute (ANSI)Japanese Industrial Standards Committee (JISC)Standards Engineering Society
International Organization for Standardization (ISO)Scandinavian Bearing Association (SBA)German National Standards Organization (DIN)
Japanese Standards Association (JSA)Typically, ntn bearing the criteria used are ISO standards.

ntn bearing support choose to pay attention to four problemsFirst, how to limit the axial position, including the radial and axial position are the first issues to consider. General dual-axis multi-support structure, the radial shaft supported by two co-limited, each supporting Department should play the role of radial positioning or angular contact bearings to the heart.Second, the axial position of supporting the restrictions by the two axial displacement in one direction is also limited by a supporting axial displacement in both directions,

1: ntn bearing speed operation:1. Analysis of cage material type (for high-speed rotation, suitable for cutting copper alloy or phenolic resin cage system. There is also suitable for high-speed rotation of synthetic resin molded cage)2. Analysis of Lubrication (used for high-speed spin cycle lubrication, spray lubrication, oil mist lubrication and oil lubrication Lubrication)3. Of bearing internal clearance (taking into account the bearing temperature rise generated internal clearance reduction)

NTN has developed a torque lower than 50% of the thrust needle bearing "low torque thrust needle roller bearings." Expected to be used to improve gasoline fuel efficiency and hybrid transmission.The new product is aimed at producing torque thrust needle roller bearings developed two elements: one for "roller" in the bearing inner and outer rings caused by different walking distance of "roller" slide in the track surface and place " roller slide and the loss of rail wheels.

1: ntn bearing deposit:1.ntn bearing the correct storage method is to ntn bearings placed in horizontal position, bearing ring should be supported throughout the side. If the bearing to the location of the vertical display, due to the relatively small thickness of bearing ring,bearing rings and rolling bodies may lead to bearing the weight of the permanent deformation.2. Stockroom of the relative humidity of not more than 60%, little change in temperature,

Incorrect installation and removal will reduce bearing life. When a small bearing assembly will enable the hand-hammer and a simple auxiliary sleeve. For medium and small bearings, installation of hydraulic machine can be used to exert pressure on the inner ring will be set to a journal on the bearing pressure for larger medium and large bearings, often used temperature method assembly

ntn Bearing selection of 4 Note1, carbon steel, high enough intensity, the lower the stress concentration sensitivity, easy to carry out a variety of heat treatment and mechanical processing, low price, supply adequate and there are the most widely used.The imports of general machinery bearings are available in 30,40,45,50 and other brands of high-quality carbon steel, particularly steel 45 after quenching the most commonly used.
 

1: ntn bearing different Sound Detection:1., Vibration detection method: It is unusual sound of an indirect detection methods, detection can be divided into qualitative and quantitative parameters of detection. Among them, qualitative detection method is divided into monitoring and observation of abnormal sound vibration wave method

Support choose to pay attention to 4 Questions:1, how to limit the location of axes, including the radial and axial position are the first issues to consider. A general multi-axle double-supporting structure, the axis of the radial position supported by the two co-limited, each supporting Department should have played the role of radial positioning or angular contact bearings to the heart.
 

ntn bearing the type of very many, but the heat is still on so few products, there is no new progress. Recently several major manufacturers bearing radiator radiator made a new technology, such as water waves bearings, magnetic bearings, bearings and other core of several of the basic forms of bearings are to be improved. Principle of operation has not changed much.When used to run the initial, low noise, manufacturing costs are also low,
 

ntn Bearing Forging: Forging Machinery imports of bearings used to exert pressure on the metal blank to produce plastic deformation in order to obtain a certain mechanical properties, a certain shape and size of forging processing methods.ntn bearing cast: a metal smelting meet certain requirements into a liquid and poured into the mold, the solidification by cooling, the Qing had to be scheduled after the whole deal with the shape, size and performance of castings (parts or blank) in process.