Needle roller bearings are a bearing that is classified as either radial or thrust depending on the direction of the load being supported. Needle roller bearings include bearings whose rollers slightly exceed the size range of needle rollers as stipulated by ISO. Needle roller bearings include drawn cup and solid radial bearings, as well as application-specific cam followers, and roller followers. Thrust bearings include thrust needle bearings.

Thrust Needle Roller Bearings consist of a precisely made cage and rollers. Thrust Needle Roller Bearings have high rigidity and high load capacities and can be used in small spaces.

Thrust Needle Roller Bearings incorporate needle rollers, while Thrust Roller Bearings incorporate cylindrical rollers. Various types of raceway rings are available, and suitable bearings can be selected according to the operating conditions.

When the needle roller bearing mounting surfaces of a machine are heat-treated and finished by grinding as raceways, Thrust Bearings can be used without raceway rings allowing the machine to be made more compact.

Thrust needle roller bearings are most suited to applications where high accuracy is required at high speeds and under fluctuating heavy loads, such as driving mechanisms for automobiles, machine tools, and high-pressure pumps.

Thrust needle roller bearing is able to continue to use a variety of needs to consider according to the extent of the damage, the main consideration in this regard is the damage effect of the mechanical properties, the importance of installation conditions need to be considered to the next maintenance period in which the effect of the decision, but can not be used for the defect case, it must be replaced with new NSK bearings, the inner ring, outer ring, rolling elements, cage cracks on any one of the gaps are Note, this is in effect maintain a bar.
Thrust needle roller bearings under load after rolling elements and raceway contact plastic deformation. The load is too heavy, it will form the raceway surface plastic deformation pits, leaving the thrust needle roller bearing strong summer generated during operation of the vibration and noise.
Since the rolling elements and raceway relative movement of dust and dirt intrusion of the rolling element and raceway surface wear. Wear is large, so that the thrust needle roller bearing clearance, noise, vibration increases, reducing the bearing running accuracy, and thus directly affect the accuracy of some of the host. So with some precision machinery thrust needle roller bearings, used to define the amount of wear NSK bearing life.
If there is iron thrust needle roller bearings, burrs, dust and other foreign matter entering the bearing will generate noise and vibration during operation, and may even damage the raceway and rolling elements. Therefore, thrust needle roller bearings installed, you must ensure that the installation surface and the installation environment clean.
Thrust needle roller bearings coated with anti-rust oil, you must use clean gasoline or kerosene carefully cleaned, and then coated with a clean high-quality or high-temperature grease before installation. Cleanliness on bearing life and vibration noise is very large. But we want to remind you that: Hermetic thrust needle roller bearings do not need cleaning refueling.
From peeling, creasing, corrosion, cracks, wear, etc. will be the thrust needle bearing vibration measurement reflected view, bearing vibration of the bearing damage is very sensitive, so, through the use of special NSK bearing vibration measurements (frequency analyzer, etc.) to measure the size of the vibration, frequency points can not be inferred abnormal circumstances. Since the measured values due to the conditions of use thrust needle roller bearing or sensor installation location is different, so each machine needs prior to analysis and comparison of the measured values determined criteria.
If the hole can be measured directly using the bearing outer ring temperature is more suitable position. Generally, NSK bearing temperature, generally based on the temperature outside the bearing chamber can be inferred. If lubrication, install the appropriate department, then thrust needle roller bearings are abrupt temperature rise, there will be an abnormally high temperature, time to stop running, take the necessary precautions.