NTN Bearings

NTN Bearings Detail Introduction

NTN has always been committed to the research and development of bearings, constantly combining advanced technology at home and abroad, after repeated experiments, before finally developing a variety of high-quality bearings, which are now sold around the world, by the majority of customers write praise.

The history of NTN bearings is also very long, since its establishment in Japan in 1918, it has experienced hundreds of years, so far in the world has more than 30 production offices, more than 70 sales offices and five research institutes, and because of this, NTN has become one of the world's comprehensive precision machinery manufacturers.

Secondly, NTN guarantees good bearing performance and quality, but the price is also very reasonable, you can always check the quotation through NTN official website, so as to save the cost of bearings for customers and bring more considerable economic benefits.

NTN Bearings Model Structure
NTN bearing model number mainly has three sides: rear number, front number and basic number. The back number is used to indicate the material, minor official and structure of NTN bearing in English and Arabic numerals.
Under normal circumstances, NTN bearing model number is only indicated by the basic model number. The basic model number is also composed of three pieces, respectively: type code, size code and bore code. The front number indicates the other side of the bearing, such as: sub-parts, in English.
Model number of rotating bearings
First of all, take the rotating bearing as an example, respectively for its front number, rear number and basic number.

NO1. Front number
In reality, there are many types of rotating bearings, and the numbers are relatively complicated, but the front numbers of NTN bearings represent the subparts, and are expressed in English. For example, K is used to represent the rotating body and linkage assembly of NTN bearings. ntn thrust bearings ntn tapered rotating bearings are available for more detailed introduction.
NO2. Back number
The bearing's rear number is used in English and Arabic numerals etc. to indicate the bearing's material, minor official and structure. Commonly used bearing radial clearance series is divided into 1 group, 2 groups and other 6 groups. The bearing's minor officials are divided into six levels from senior to low, and the structure number inside is followed by letters to indicate the different inside structures of the same type of bearing.

NO3.Basic number
Basic number shows NTN bearing width series, inside diameter, diameter series and type. ntn bearing type code with the basic code from the right of the fifth digit (for cylindrical roller bearings and needle bearings and other type code for letters), bearing inside diameter with the basic code from the right of the first digit. The same structure, the same inner diameter bearing in the outer diameter and width of the change series with the basic code from the right of the third digit. For example, for to the heart bearing and to the heart thrust bearing, 0, 1 said special light series; bearing structure, inner diameter and diameter series are the same bearing width changes in the series with the basic code from the right of the fourth digit. In 1990, China decided to tamper with the original rotation bearing code method, and developed a national standard.

More description

NTN's main products are bearings, which are the basis of all machines and are indispensable in modern society. NTN bearings are also the bearing brand of Japan's Nippon Seiko Co.

NTN's lineup of automotive components is not limited to automotive bearings, but also includes steering gears and steering columns, clutch friction parts, constant velocity universal joints, etc. NTN's product lineup is strong, ranging from standard bearings with ISO specifications to highly functional special bearings developed in-house, and includes a wide range of bearings required for each process of metallurgical equipment.

In addition, NTN has introduced new solutions for high value-added products and environmental protection. We offer a variety of bearings with long service life and high ultimate speed performance. These products contribute to improving the productivity and reducing the maintenance costs of machinery and equipment used in harsh conditions such as mining sites and construction sites.

NTN provides a wide range of high-performance, high-quality and environmentally friendly automotive-related products, including various bearings and electric power steering devices, which are used by automobile manufacturers worldwide. As a comprehensive manufacturer of machine components, NTN meets the needs of customers at a higher level while helping them realize all requirements of machine tools from early start-up to overall optimization.

NTN's popularity is also due to its production of bearings made of pure materials, high product precision, and a wide variety of products that can be used in a wide variety of environments and machines, always maintaining a leading edge in technology.

With the global expansion of machinery, more and more industries and enterprises use NTN bearing, which has been involved in construction machinery, machine tools, automobiles, metallurgy, mining, petroleum, machinery, electric power, railroad and other industries. Moreover, NTN has been working hard to develop and deepen its own professional fields in various departments such as production, sales and technology, while organically combining them with each other.

NTN Bearings Complete Buying Guide:

The following are frequently asked questions and answers about NTN Bearings to better help you understand and know NTN Bearings.

1、How NTN Bearings Works

Check whether the wiring of the plug and socket is consistent, the grounding should be good, and then insert the plug into the power socket with the control switch. The main machine is a transformer with special structure, and the movable yoke is used to directly thread the bearing or other heated workpiece. When working, turn on the power of the main machine, the workpiece will be heated by short-circuit current induction. Press the start button, the main machine is energized, then the green light is on and the red light is off, press the stop button, the red light is on and the green light is off. At this point, the commissioning is over and can be put into use.

2、Benefits of NTN Bearings

(1) Mainly bear radial load, but also can bear a certain amount of axial load.
(2) The technical content is very high, and the higher technical content improves the cost performance to a certain extent.
(3) Suitable for high speed or even very high speed operation, and very durable, without frequent maintenance.
(4) Small coefficient of friction, high limit speed, simple structure, low manufacturing cost, easy to achieve high manufacturing accuracy.
(5) NTN bearing cage is mostly steel plate stamping wave-shaped cage, large NTN bearing more metal solid cage using the car.

3、NTN rolling bearing disadvantages

(1) rolling bearing capacity to bear the load is much smaller than the same volume of sliding bearings, therefore, the radial size of rolling bearings is large. Therefore, in the occasion of bearing large loads and require small radial size, compact structure requirements of the occasion more use of sliding bearings.
(2) rolling NTN bearing vibration and noise, especially in the late use of particularly significant, therefore, the precision requirements are high, and not allowed to have vibration occasions, rolling bearings are difficult to perform, the general choice of sliding bearings better.
(3) rolling bearings are particularly sensitive to foreign objects such as metal chips, once the bearing into foreign objects, will produce intermittent larger vibration and noise, will also cause early damage. In addition, rolling bearings due to metal inclusions and other early damage may also occur. Even if early damage does not occur, the life of the rolling bearing also has a certain limit.

4、The load of NTN bearing

The bearing adopts a relatively simple structure with balls with smooth metal surfaces inside and outside, which helps rolling. The ball itself carries the weight of the load, and the force of the negative load weight is the force that drives the rotation of the bearing. However, not all loads exert forces on the bearing in the same way; there are two different types of loads, radial and thrust.

Many bearings are susceptible to radial and axial loads. Radial loads, such as in a pulley, simply place weight on the bearing, causing it to roll or rotate due to tension. Thrust loads are significantly different and stress the bearing in a completely different way. If the bearing flips on its side and is subjected to full force at that angle, this is called thrust load.

5、Industries using NTN Bearings

NTN bearings are the most representative rolling bearings, a wide range of uses, suitable for high speed or even very high speed operation, size range and form of change, NTN bearings are commonly used in gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, engineering machinery, etc., is the most widely used in the machinery industry, a class of NTN bearings.

6、Types of NTN Bearings in the Market

NTN common bearing classification: NTN miniature ball import bearings, NTN deep groove ball import bearings, NTN centripetal thrust ball import bearings, NTN self-aligning ball import bearings, NTN cylindrical roller import bearings, NTN tapered roller import bearings, NTN thrust ball bearings, NTN self-aligning roller bearings.

Besides, the leading products of NTN bearings in Japan are: NTN rolling bearings, NTN deep groove ball bearings, NTN high precision bearings, NTN spherical bearings, NTN housing bearings, NTN flat ball bearings, NTN short cylindrical roller bearings, NTN linear guide bearings, NTN ball screw bearings, NTN micro linear guide bearings, NTN cross roller guide bearings, NTN reciprocating bearings, NTN rotary bush bearings, NTN tapered roller bearings, NTN self-aligning ball bearings, NTN self-aligning ball bearings, NTN self-aligning ball bearings. bearing, NTN bearing ball sliding group, NTN bearing cam follower bearing.

7、Future of NTN Bearings

With the rapid development of the economy, the material living standard of the Chinese people has been rapidly improved, the previous single material life has been completely changed, replaced by a rich and colorful material life, not only the same thing will have dozens of different brands of products, even our daily life NTN bearings also appear many different types, different brands.

NTN bearings as the rising star of our bearing production industry, in technology to invest much more money and energy than the energy and labor invested in the capital and energy, this input ratio to a certain extent, resulting in the use of our bearings, the cost performance has been greatly improved, to better serve consumers, its future development is very optimistic.

8、How much NTN Bearings Cost

Although NTN bearing is a kind of bearing we just developed in recent years, is in the rising development period, but because of its foundation is not stable, and many consumers lack of some necessary understanding of it. Therefore, the bearing manufacturers use the strategy of occupying the market by price, the lower price will not bring too much pressure on the buyer's money, the lower price has also become one of the advantages of NTN bearings.

9、Parts of NTN Bearings

Since various machines have different working conditions, the rolling bearings have different requirements in terms of load capacity, structure and performance, etc. For this reason, NTN bearings need to have various kinds of structures. However, the most basic structure is composed of inner ring, outer ring, rolling element and cage, usually called the four major components. For sealed bearings, plus lubricants and seals, also known as the six major components.

Various bearing type name is mostly based on the name of the rolling body to the corresponding name. The role of various parts in the bearing, respectively, for the radial bearing, the inner ring usually with the shaft tight fit, and run with the shaft, the outer ring usually with the bearing housing or mechanical housing hole into a transition fit, play a supporting role. However, in some occasions, there are outer ring running, inner ring fixed support role or inner ring, outer ring are running at the same time.

For thrust bearing, and shaft tight fit and together with the movement of the said shaft circle, and bearing seat or mechanical shell hole into a transition fit and play a supporting role said seat circle. Rolling body in the bearing usually with the help of keep frame uniformly arranged between the two rings for rolling motion, its shape, size and number directly affect the bearing load capacity and use performance. In addition to the rolling body can be evenly separated, but also to guide the rolling body rotation and improve the internal lubrication performance of the bearing.

10、NTN Bearings Maintenance Process

(1) When inspecting NTN bearings, do not expose the bearings to contaminants or moisture. If the work is interrupted, the machine should be covered with oil paper plastic sheet or similar material.
(2) In order to judge whether the dismantled NTN bearing can be reused, focus on checking its dimensional accuracy, rotational accuracy, internal clearance, and mating surface, raceway surface, cage and seal, etc.
(3) When dismantling the NTN bearing for inspection, first make a record of the appearance by photography and other methods. In addition, confirm the amount of remaining lubricant and sample the lubricant before cleaning the bearing.
(4) Usually the cleaning agent used is neutral water-free diesel oil or kerosene, and sometimes warm alkaline solution is used as needed. No matter which cleaning agent is used, it should be filtered frequently to keep clean. After cleaning, immediately apply antirust oil or antirust grease on NTN bearings.

11、How to Troubleshoot NTN Bearings

(1) Check the sound of NTN bearings when rolling
Even if the bearing is slightly stripped or damaged, it will make abnormal and irregular sounds, so it is possible to distinguish them by using a microphone.
(2) Checking the temperature of NTN bearings during rotation
It is more appropriate if the temperature of the outer ring of NTN bearing can be measured directly by using the oil hole. In general, the temperature of NTN bearings can be inferred based on the temperature outside the bearing chamber. If the lubrication, installation department is appropriate, the bearing temperature will rise sharply, there will be abnormal high temperature, then you must stop the operation, take the necessary precautions.
(3) Check the vibration of NTN bearings in operation
From spalling, indentation, rust, cracks, wear, etc. will be reflected in the vibration measurement of the bearing, bearing vibration is very sensitive to bearing damage, therefore, by using a special NTN bearing vibration measurement device can measure the size of the vibration, through the frequency division can not be inferred from the abnormal specifics. Because the measured value varies depending on the conditions of use of NTN imported bearings or sensor installation location, it is necessary to analyze and compare the measured value of each machine beforehand to determine its judgment criteria.

12、How to Verify Quality of NTN Bearings

(1) through the surface feel NTN bearing quality, good quality bearing surface bright should be a kind of bright, the cause of this bright is the steel used in the bearing whether the standard and its grinding process and the cutting fluid used, the first two of which are mainly.
(2) to see whether the chamfer is bright, NTN bearing chamfer does not determine the quality of the bearing, but reflects the processing method of the bearing. The chamfer is black, indicating that after quenching and other heat treatment, so as to increase the hardness of the bearing, and some people think that the chamfer is black does not look good is not completely processed, which is a misconception.
(3) One cage is better than two bodies, although the new process are using one cage, but it only saves the material, and the performance of the rotary and other poor than two bodies. In general, NTN bearing life and three factors have a relationship, one is the quality of the bearing itself, the second is the use of the environment, and the third is the installation method.

13、How to solve the problem of oil seal state of NTN bearings?

Check how the state of the oil seal of the bearing can be good to close the NTN bearing to do well, if the oil seal of the bearing is in good condition, so that it can effectively prevent the liquid with heat, putrefactive liquid will flow into the bearing along the shaft, if the oil seal where bad, it needs to be replaced immediately then.

Check the NTN bearing's moving body, baffle plate and rotating surface, if these parts appear stuck, then you need to know whether the bearing can be used for a longer period of time. To know whether the bearing can be used for a longer time, it mainly depends on the degree of wear of the components and whether its function is affected, if the damage is serious, it is necessary to take out and use a new bearing.

Check the bearing collar and rotating body, if the collar and rotating body are broken, it is necessary to quickly and correctly disperse the signal, collect the correct data, and take the manual or automatic identification method to judge, the content of the tension work includes the display of the operation status. Lubricant replenishment and replacement, as well as to regularly overhaul the machine, as long as there is a little damage, are not used to reduce the occurrence of more problems.

14、How to adjust the radial clearance of NTN bearing?

In the process of measuring the radial clearance of NTN bearing, make sure that the ball falls into the bottom of the groove, for the closed type bearing to be measured before closing, when using the load instrument for measurement its, the measured value should also subtract the load caused by the increase in clearance. When the object of measurement is multi-row ball bearing, then require the measured value of each clearance to pass, and then take the arithmetic mean of each clearance as NTN bearing radial clearance.

15、NTN bearing locking method has which two kinds?

(1) the bearing with tightening screw
Only need to lock the tight nail screw on the inner ring extension part, can be fixed to the export bearing seat, tighten the screw with hexagonal wrench can be locked, to choose the size of the appropriate hexagonal wrench.
(2) Bearing with fair locking sleeve
Fair locking sleeve has a concave, this concave and its bore into a fair, in the bearing seat of the inner ring also has a part for the fair. Firstly, position the fair sleeve on the inner ring, rotate the fair bearing sleeve towards the direction of rotation of the shaft, rotate the fair bearing sleeve rapidly to know the tightness of the card, and lock the tightening screw with the hexagonal wrench.