FAQ1.Why is the bearing temperature too high?
(1)Lubricating oil doesn’t meet the quality requirements or goes bad,so that the oil viscosity is too high;
(2)Lubricating grease is filled too much;
(3)Bearing preload is too large;
(4)There is cooling problem in Spindle.

2.As for grease filling quantity,the more,the better?
This is a common mistake,excessive grease will cause excessive stirring and much higher temperature.
When ZYS high speed precision bearings use grease lubrication,the grease quantity should take up about 15%~20% of bearing interior free space.Please check the reference Table.57 and Table.58 in ZYS precision bearing catalogue to get the grease quantity reference value.

3.How to correctly mount bearing to shaft?
(1)Using of hammer and sleeve
This method is widely used to the small and medium size bearings with loose fitting between rings and shaft or housing.But this method will make the load capacity of bearing unstable,and bearing will be given impact force,so it’s not suggested to use this method to mount precision bearing.
(2)Using pressure devices
The pressure devices include press machine,hydraulic gripper,hydraulic clamp and hydraulic nut,etc.The feature of this method is to avoid direct striking bearings and relevant damage.However,adopting this method must make sure the press line coincides with bearing axis to prevent bearing tilting.
(3)Heating inner ring
It’s difficult to use pressure devices to mount the bearing when the magnitude of interference is larger,which does harm to bearing fitting surface.Therefore,it’ll be easier to mount bearing through heating and expanding inner ring.
At present,we usually use magnetic induction heaters (ZYS has such products) to heat the inner ring.

Company Information

Luoyang Bearing Science And Technology co.,ltd.

Brief Outline

ZYS Tenet: To lead the science and technology development of bearing industry and to

improve the world’s equipment level.

ZYS Spirit: To keep continuous improvement, to pursue brilliance

ZYS Core values: Integrity, rigor, innovation, mutual benefit

1.About ZYS company	Luoyang Bearing Science and Technology Co.,Ltd.(ZYS)
	ZYS was formerly known as Luoyang bearing research institute, which was founded in 1958 and was the only first-class comprehensive research institute in China bearing industry. As it became one member of China National Machinery Industry Corporation in 1999, the former institute was transformed into the science and technology enterprise. Then Luoyang Bearing Science & Technology Co., Ltd. was established in 2001.
	ZYS is a high-tech enterprise, which focuses on the research and development of “high-tech, precise, cutting-edge, specialized and special” bearing products, which are applied to the mainframes of national economic construction in various fields and national defense construction. It was listed at Shenzhen Stock Exchange with stock code 002046 in 2005.
2.Produts list	1.High precision angular contact ball bearing
	2.Precision spindle bearing
	3.Hybrid ceramic bearing
	4.Slewing bearing
	5.Cylindrical roller bearing
	6.Needle roller bearing
	7.Taper roller bearing
	8.Precision lathe bearing
	9.Dental drill bearing
	10.YRT rotary table bearing
	11.High-frequency spindles
	12.Bearing measuring instrument
	13.Bearing ball
	14.Bearing making machine
	etc.
3.Packing	Vacum packing, Single colour box for inner package,Case or Carton for outer package,or according to customer's required
4.Material	GCr15,9Cr18,G20CrMo or others
5.Certificate	GB/T19001-2000(ISO9001:2000),GJB/Z9001A-2001,GJB9001A-2001
6.Glory	1.China National Accreditation Laboratory for Bearing
	2.State Key Laboratory for Bearings of Earth Pressure Balance Shield
	3.State Quality Supervision and Testing Center for Bearing
	4.National Technical Committee for Rolling Bearing Standardization
	5.ISO/TC4 China Secretariat
	6.National Patent Exchange Workstation
	7.The Technical Committee of China Bearing Industry Association
	8.The Research Center for High-speed Precision Bearing Engineering
	9.The Bearing Industry Branch of Machinery Industry Professional Skill Appraisal Center
	10.Listing Company in Shenzhen Stock,Stock no.002046

ZYS Advantage

ZYS has a strong strength of manufacturing high-precision and high-reliability bearings and relevant parts. ZYS company not only possesses advanced bearing manufacturing equipments and international first-class measuring instruments,but also has strong strength of manufacturing,inspecting and testing the high-precision and high-reliability bearings and relevant spare parts.In the meantime,it always keeps a leading position in bearing basic theory,lubrication technology,design,material,test,information criterion and other aspects. As a leading enterprise in aerospace bearing industry of China, the company has successfully accomplished the milestone tasks of bearing assemblies for “Dong fang hong” series man-made satellite, manned spacecraft series from “Shenzhou 1” to “Shenzhou 7” and “Chang’E” lunar exploration program, which are commended by relative administrative departments for several times.

ZYS R&D Center

ZYS Industry Parks

Bearings Workshop

Spindle Workshop

Large-size Bearing Workshop

Packaging & Shipping

Package

Application

The “high-tech, precise, cutting-edge, specialized and special” bearing products have been widely applied to aviation, spaceflight, navigation, machine tool, wind turbine generator, metallurgy, petroleum, chemical, medical treatment, rail transport, automobile, textile, and other fields.

(example:wind bearing)

Our Services

With our customers

We would like to and ready to do business with any company from all over the world.If any of ZYS products interests you or if you have interests in ZYS company,please don't hesitate to contact with us,we would like to give you ZYS best quality service any day any time!!!!

Best regards,

ZYS

Address: No.1 Jilin Road, Luoyang, Henan, P.R, China

Zip Code:471039
Website: www.zys.com.cn www.zysbearing.com

Skype: zysdongoffice