taper roller bearing industry has been one of the national key enterprises

company developed " Metro ( light rail ) development and application of bearings " project , if successfully implemented, can promote China's subway cars bearing domestic work , breaking the monopoly of foreign technology , reduce procurement costs and improve the ability to self- repair , revitalize national industry, to promote the development of China's rail transportation equipment manufacturing and upgrades.
Insiders said that before the 1990s, Northwest bearing bearing industry has been one of the national key enterprises , the scale of production in the fourth digit industry . The company plans a total Bearing manufacturer investment of 400 million yuan construction of high-end bearings project construction period of 2 years , the first four years of full production . After completion, the expected sales income 63,000 yuan, net profit of 6,150 million. With the successful implementation of roller bearings the project , Northwest bearing plain bearing products will be phased out , the major resources into high value-added " large , high-speed , precision ," R & D and production of high-end bearings , very in line with national industrial policy , comply with the current economic , policy orientation. This will not only be able to expand its market share in the Northwest bearing production scale and product , help the company to return to the first tier bearing enterprises , but also to promote the overall development and progress of China's bearing industry to some extent

To shorten the gap between the world ball bearing

To shorten the gap between the world powers bearings , bearing manufacturing to improve our manufacturing level , the Chinese government has issued a series of industrial policies to support and encourage domestic enterprises towards the end bearing bearing localization direction. "Long-term Science and Technology Development Plan (2006 - 2020 ) " should be made to focus on the development of major equipment required for the Bearing test machine design of key basic parts and components , manufacturing and key technologies for mass production . China's " bearing industry," second five "development plan" put forward , "Twelve Five" period, the bearing industry 's main business grew 11.84 percent average annual production average annual clutch bearing growth of 13.30% , industry profits grew 13.90 percent average annual total goals. This reflects the country fully affirmed the important status and role of the bearing industry in the national economy , as well as support for the development of industrial bearings , bearings for the healthy development of the industry provides a good opportunity for development .

Rolling in the manufacture of the contract is required clearance

Tapered roller bearing type code 30000 , tapered roller bearings for the separation of bearings . Under normal circumstances, especially in the inner cone GB/T307.1- " Rolling bearings tolerance " involved in the size range of roller bearings are one hundred percent can be used interchangeably in common between the outer and inner components . The angle of the outer ring raceway and the outer diameter has been standardized Bearing manufacturing machine with the same dimensions provides . When allowed to change in design and manufacturing . Between the tapered roller bearings to cause the outer and inner components can be interchanged in common worldwide .
Tapered roller bearings are mainly used to bear radial load mainly radial and axial load . Compared with angular contact ball bearings , bearing capacity, low speed limits . Tapered roller bearings can withstand axial load in one direction a direction to limit the axial displacement of the shaft or housing .
Dynamic bearing from manufacturing to installation and then use its clearance what changes
Rolling in the manufacture of the contract is required clearance
this clearance is generally referred to as the original clearance ; while the bearing is installed on the host , because a ferrule has an interference fit , resulting in reduced high speed bearing clearance values this clearance is formed after the installation is called installation clearance ; after running, bearing parts temperature, volume changes, because the bearing shaft or housing to match the temperature increases also occurred in the age of elongation phenomenon, which lead to recurrence of the bearing clearance changes , this work is called up clearance clearance work . Generally, it is less than the installed operating clearance clearance, sometimes also with the clearance values ​​group with different installation methods increases.
The method of running track and applied load

for more oil wedge tilting ball bearing does not allow repair scratch pad

can be carved by hand scrape or bearing surface after turning padded repair scraping method adjustments.  2, cylindrical and oval on top of the bearing clearance , can be hand- scrape method or circumstances allow the bearing to the equatorial plane padded adjustments.  3, for more oil wedge fixed bearing, in principle, allow repair scratch and adjust bearing clearance , clearance inappropriate should be taper roller bearing replaced with new tile .  4, for more oil wedge tilting bearing, does not allow repair scratch pad , the gap should be replaced due to improper tile . Adjustable tile thickness can be adjusted by the amount of tile tile behind the next plus stainless steel pad adjustment block , block or adjust the thickness of the thinning method . Note for more oil wedge tilting high speed bearings  among the same group of tile thickness error should be less than 0.01mm.maintenance of technical requirements for the operation of the bearings to withstand load, speed , temperature , vibration, noise and lubrication condition monitoring and inspection , abnormal immediately find reasons to adjust to return to normal. Without further need for impact resistance as spherical roller thrust bearing materials using chrome steel , chrome molybdenum steel , nickel-chromium -molybdenum steel , the use of carbon infiltration quenching the steel from the surface to the proper depth of a hardened layer

ZYS clutch bearing avoid resonance with the host , avoiding sensitive resonance speed

In general , to control noise bearings must take countermeasures root causes for these noise generation , in order to receive a permanent cure results. The main route is :  (1) Choose low noise Cylindrical roller bearings ; (2) avoid resonance with the host , avoiding sensitive resonance speed ;  (3) from the cylindrical roller bearing applications link on trying to eliminate noise ;(4) is invalid in other ways , additional measures of noise and silencer . bearings when the temperature rises , first determine whether the malfunction, as indeed increased, should wheel bearing be treated as follows :  check the cooling water pressure , flow and piping systems are normal. If water filter may be clogged down and can not handle , you can stop treatment, when it is confirmed to work , and then put into use.  Should check governor oil pressure, oil pressure may result if the cooling water hydraulic valves closed.  Check whether there is abnormal sound ball bearings  bearings , cylindrical roller bearings and detect whether there are abnormal swing . Take oil samples to observe whether there are changes in oil color , and conduct tests to see whether the deterioration. If confirmed deterioration , should be shut down to replace with new oil. Check the oil standard oil level is normal, if abnormal , check the tank drain valve is closed. If closed, should fill the oil , if it is sealed cushion oil leakage should stop processing

No matter how high-performance ball bearing

Bearings are precision components , be careful when you need to use . No matter how high-performance  high speed bearing  , if used improperly , it will not get the expected performance . Here are some Precautions bearing. A keep clean environment in and around bearing invisible even fine dust into the bearing , will increase the wear , noise and vibration of the bearing. Cylindrical roller bearings and their peripheral accessories should be kept clean , especially dust and dirt , tools and work environment are essential to keep it clean . Second, when used carefully allowed to install a powerful punch , knocking allowed direct bearing with a hammer , are not allowed to pass through the rolling pressure . Third, the use of appropriate , proper installation tools possible to use special tools, such as heaters and special high precision bearings    drawing tool , etc., try to avoid using things fabric and staple fiber and the like . Fourth, to prevent corrosion of the bearings by hand directly when handling bearings, be sure to wash hands sweat , and coated with high-quality mineral oil before operation, especially during the rainy season and summer to pay attention to rust. However , in some special operating conditions , cylindrical roller bearings can get a longer life in traditional computing, especially in under light load conditions. These special operating premise is that when the rolling surface ( track and rolling elements ) are effectively separated and limit pollutants may cause damage to the surface of a lubricant film .

ZYS taper roller bearing crane maintenance operation 50 hours lubricated once

maintenance crane technology shift tooth surface work 10 once the debris should be removed and re- coated with grease.
 In order to ensure crane maintenance technical reliability of the bolt work to avoid bolt preload is insufficient, slewing the first 100 hours of work and 500 hours , respectively crane ZYS Precision Bearings maintenance should check pretension bolts . Then every 1000 hours of operation should be checked once pretension .
technology to connect maintenance crane slewing ring bolts and nuts are made of high-strength bolts and nuts ; double nuts and lock .
crane maintenance techniques tighten the nut should topcoat oil and nut threaded end of the bolt , and a torque wrench should be used uniformly in the circumferential direction ZYS taper roller bearings of symmetry repeatedly tightened. Crane Maintenance Technical finally tightened again when the crane maintenance techniques on each bolt tightening torque should be roughly uniform.
 crane maintenance technology in the slewing ring gear surface raceway parts are aligned cloth 4 cup oil , thereby adding grease to the Raceway . Under normal circumstances , slewing crane maintenance operation 50 hours lubricated once. Every crane maintenance techniques must add a little oil until the oil leaking from the seal so far .