Currently the main use of four cylindrical roller bearings and four-row tapered roller bearings, also with double row cylindrical roller bearings, double row tapered roller. Tapered roller bearings they use a hollow roller and the pillar of the cage to improve the bearing lubrication, bearing cylindrical surface and end, respectively to open a fuel tank and the hole, as with the roll neck for the clearance fit, the bearing inner circle hole surface the creation of spiral grooves.

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;

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.
 

Install thrust bearing, they should test shaft ring and shaft centerline perpendicularity. Method is to dial gauge fixed on the tank shell face, so touch the table top of the head ring in the bearing raceway upper rotating shaft bearings, side observation dial gauge pointer, if the pointer yaw show ring and shaft axis is not perpendicular to the centerline.

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