More top tight radial method used in radial load bearing tapered hole, the typical example is the double row precision cylindrical roller bearings, using nuts to adjust the tapered journal bearing relative to the axial position, so that within circle have the right volume by radial expansion of the negative clearance, the method for machine tool spindle and multi-jet engine.Axial preload law tightening and positioning in general can be divided into two constant pressure preload.

 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 quenching oil Optional:1. Ordinary quenching oil (oil temperature at 60 ℃ for quenching)Ordinary quenching oil is mainly applied to better hardenability alloy, such as small size bearing steel, mold steel part quenching. The past, only with different grades of domestic mechanical oil as quenching oil. The early 20th century 80, in order to improve the performance of oil cooling, thermal oxidation stability and rust resistance, mechanical oil added to the reminder of cold,

ntn bearings require lubrication in order to ensure maximum service life, many users do not know how to lubricate bearings, causing premature bearing damage.ntn bearings bearing is not easy to bad lubrication is good, so so that bearing life is too short. Here is the relevant knowledge on the bearing area include the following aspects:1, first of all the various parts of the bearing lubrication, reducing bearing friction and wear;

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