SF-2X Marginal lubrication bushing is based on a composite material with 3firmly bonded layers:steel as backing, sintered bronze spherical powder as interlayer and modified POM(polyformaldehyde) as lining layer. It fits well for low speed, heavy duty and normal temperature and saves cost and prolongs working life when replacing normal full copper sleeves. It is widely applied in auto chassis, forging machine metallurgical and mining machine ,civil engineering, power station, strip rolling industries, etc
  
Color Metallograph
  
 ---POM (polyformaldehyde)  with lead,
 0.3~0.5mm
  
---Porous bronze (CuSn8Zn3), 0.2~0.3mm
 
---Steel backing (ST12, or DC01), 0.4~2.2mm
 
---Copper or Tin  plating 0.005~0.008mm
 
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Steel Backing Technical Data
Code Comparable Code Chemical Composition% Physical Properties
ASTM DIN BS JIS C Mn P S Al Yield Strength
<=N/mm2		 Tensile Strength
N/mm2		 Elongation
%
ST12 1010
1008		 CK10(1.1121)
C10(1.0301)		 040A10
050A10
060A10		 S10C
S09CK		 0.10 0.5 0.035 0.035 -- 280 270~410 28

Physical Properties
Load Capacity Temperature Limit PV Limit (dry) PV Limit (oil) Friction Coef Speed Limit
140N/mm2 -195¡æ~280¡æ 4.3N/mm2 60N/mm2 0.03~0.18  10m/s

Size Specification

Application Case
1. Good load capacity and anti-wear.
2. It is used in high load capacities and low speed with rotational, oscillating or frequent stop-start motion.
3. It can work long time without oil in the condition of boundary lubrication, under oil or grease lubrication interval, the work is longer.
4. It is machinable for the thicker of POM.
5. The bushed can be applied in auto chassis, forging machine metallurgical, civil engineering, Power station , strip rolling industries etc.

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