enKDB20

KDB201 is designed for marginal lubricating bushing. It is backed with copper-plated steel with porous bronze sintered on it and polymers (POM) imbedded into the bores of the bronze. The steel back provides the products with high quality low carbon steel. Oil dents stamped on the surface of the polymer can achieve good lubrication between the bushing and its mating axis. It is of good anti-abrasion and load capalility. The plating coating on the surface is erosion protective. And it is environmental protective as no lead included in the surface polymer POM. Products of KDB201 series are widely used on automotive chassis, forging machines, mine quarrying machines, metal melting and casting machines and in water irrigating and steel rolling industries.

Performance		Data
Max Load P	Static Load	140N/mm²
Max Load P	Dynamic Load	70N/mm²
Max Load P	Oscoillation Load	60N/mm²
Max line speed V	Grease Lubrication	2.5m/s
Max PV value	Grease Lubrication	2.8N/mm²· m/s

Performance		Data
Friction Coefficient μ	Grease Lubrication	0.06~0.12
Mating Axis	Hardness	>270 HB
Mating Axis	Roughness	Ra=0.4~1.25
Working temperature		-40~+120℃
Thermal conductivity		52W/(m·k)
Coefficient of linear expansion		11×10^-6K^-1

Physical and Mechanical Performance
KDB201 Normally, the surface polymer of KDB201 is of chemical-erosion resistant quality. So its erosion-prevention quality is primarily decided by the quality of the steel back and its plating layer. Air-erosion could be effectively prevented if the steel back is plated with bronze or tin. If the bushing is to be used in erosive environment, the steel back needs to be plated with zinc, etc.

Anti-abrasion Performance
KDB201 See the following chart for abrasion charecterics of KDB201 in the condition of grease lubrication. From the chart, it can be known that in the "Running-in" phase, the wear rate is rather small and when smearing grease during assemblage,it will the gradually become bigger (see dashed line 1 in the chart ). Of course, if the lubricating grease was duly added, the wear rate could still keep steady. Service life of the bushing could be prolonged if the time interval for adding grease is appropriate. The time interval is decided by the running PV value while service life is decided by the accumulative abrasion quantity.

In the condition of grease lubrication: recommend to use lithium fatty acid when environment temperature is lower than 80℃ and to use silicon fatty acid when environment temperature is above 80℃. It is not advisable to use fatty acid with EP additives.

1)PV value PV value is an effective criterion to calculate the service life of KDB201. If there is need to prolong the service Life, PV value must be reduced. 2)Ambient Temperature When the environment temprature is above 40℃, performance of KDB201 will be obviously debased. Therefore, the higer the working temperature is, the shorter the life of the products would be. 3)Quality of the Mating Surface When Roughness of the mating surface Ra=0.4~0.63, service life of KDB201 could be obviously prolonged.

KDB20 Series products

: KDB200
(SF-2)
Carbon Steel + Copper Powder + (PTFE + Pb + Filler)
READ MORE Product Size

: KDB201
((without lead)
Copper plate + copper powder + (PTFE + Pb + filler)
Performance data

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: KDB202
(without lead)
Stainless steel + copper powder + (PTFE + Pb + filler)
Performance data

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: KDB203
(without lead)
Carbon Steel + Copper Powder + (PTFE + Pb + Filler)
Performance data

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: KDB206
(without lead)
Carbon Steel + Copper Powder + (PTFE + Pb + Filler)
Performance data

Product Size

Committed to the implementation of IATF 16949:2016 quality standards

Products centerSheet sinteringDesign ResourcesApplication area

Chinese market：NO.108 Zhijiang Road, Jiashan Economic Development Zone, Zhejiang 314100, China
Asia, Africa, Oceania Market：22nd Floor, Building 1, Cannan Square, No.1888 Zuili Road, Nanhu District, Jiaxing, Zhejiang 314050, China
Middle East, European and American markets：Room 902, No.1221 Xietu Road, Shanghai 200032, China

Contact phone：0-18858336880

About us

KDB Bearing Co., Ltd. is a professional manufacturer of KDB series plain bearings and has developed and manufactured six series of products.

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