DP4-B Specifications   DP4-B cylindrical bushings Metric Sizes				DP4B bearing, fibres and PTFE lined, BRONZE backing, composite dry bush   Sintered PTFE and Polymer Fibres mixture and Bronze Powder  on Bronze Backing PTFE / Polymer Fibres + Bronze + Bronze Backing Features Suitable for dry running, low coefficient of friction, lower wear, good sliding characteristics, the transfer film created can protect the mating metal surfaces, suitable for rotating and oscillating movement, high chemical resistance, low absorption of water and swelling. SBP4B materieal improved the friction and much good wear resistance over the common SBU bearing range under lubricated operation. Structures 1. PTFE/Polymer fibres mixture thickness 0.01~0.03mm. Lead-free bearing layer provides an excellent initial transfer film, which effectively coats the mating surfaces of the bearing assembly, forming an oxide type solid lubricant film. 2. Sintered bronze powder thickness 0.20-0.35mm, provides max. thermal conductivity away from the bearing surface, also serves as a reservoir for the PTFE mixture. 3. Bronze backing, provides exceptional high load carrying capacity, excellent heat dissipation and very good corrosion resistance. Technical Data Physical and Mechanical Properties   Usage Maximum Operating Temperature Tmax 280 °C dry good Minimum Operating Temperature Tmin -200 °C oil lubricated very good Maximum Static Load Psta,max 250 N/mm2 grease lubricated good Maximum Dynamic Load Pdyn,max 140 N/mm2 water lubricated fair Maximum Sliding Speed V-dry 2.5 m/s process fluid lubricated good Maximum Sliding Speed V-oil lubricated 5 m/s   Maximum PV Factor-dry 1 N/mm2 * m/s Maximum PV Factor-oil lubricated 10 N/mm2 * m/s Coefficient of friction f-dry 0.04-0.25 - Coefficient of friction f-oil lubricated 0.02-0.08 - Typical Applications DP4B is developed for high duty, oil lubricated, hydraulic applications...Automotive suspension struts, shock absorbers guide bushing, hydraulic cylinders, gear pumps, motors, axial and radial piston pumps & motors. DP4B is designed mainly for using under lubricated conditions and it performs excellent wear resistance and low static/dynamic friction coefficient. DP4B bearing, fibres and PTFE lined, BRONZE backing, composite dry bush   Other Standard DP4B Shapes
DP4B bush & DP4B bearing       0203DP4B | 2x3.5x3 mm   0608DP4B | 6x8x8 mm

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