1 2 3 4 5 6 7 8 4 material grades of ntn engineering plastics features of ntn engineering plastics ntn engineering plastics material standard dimensions introduction of materials and products for applications materials for bearing applications design and selection for bearing applications technical reference application examples
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standard series of ntn engineering plastics sliding bearings dimensions to be measured at 25°c dimension mm c 0.3 0.3 0.3 0.3 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.8 0.8 0.8 0.8 0.8 1.0 1.0 1.0 1.0 1.0 0 -0.20 0 -0.20 0 -0.20 0 -0.20 0 -0.20 0 -0.20 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 0 -0.25 recommended fit shaft h6 3 4 5 6 7 8 9 10 12 15 17 20 22 25 28 30 32 35 40 45 50 0 -0.006 0 -0.006 0 -0.008 0 -0.008 0 -0.009 0 -0.009 0 -0.009 0 -0.009 0 -0.011 0 -0.011 0 -0.011 0 -0.013 0 -0.013 0 -0.013 0 -0.013 0 -0.013 0 -0.016 0 -0.016 0 -0.016 0 -0.016 0 -0.016 mm type ar sleeve bearing part no r-ar0305 r-ar0406 r-ar0506 r-ar0608 d tolerances d tolerances l tolerances 3 4 5 6 7 8 9 10 12 15 17 20 22 25 28 30 32 35 40 45 50 -7 housing m7 0 6 -0 012 0 7 -0.015 0 -0.015 0 -0.015 0 -0.018 0 -0.018 0 -0.018 0 -0.018 0 -0.018 0 -0.021 0 -0.021 0 -0.021 0 -0.021 0 -0.025 0 -0.025 0 -0.025 0 -0.025 0 -0.025 0 -0.025 0 -0.030 0 -0.
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standard series of ntn engineering plastics sliding bearings mlcf type mlc bearing wall thickness t1 inner outer collar diameter diameter diameter d d fd 3 4 5 6 7 8 10 12 14 4.6 5.6 7 8 9 10 12 14 16 17 18 20 23 25 27 28 30 32 34 35 36 39 42 44 50 55 60 65 7 9 10 12 13 15 18 20 22 23 24 26 31 33 35 36 38 40 42 45 46 49 52 54 60 65 70 75 length l tolerances 3 mlcf0303 mlcf0404 mlcf0504 mlcf0505 0 -0.4 7 8 4 5 6 mlcf0605 mlcf0606 mlcf0607 mlcf0608 mlcf0705 mlcf0806 mlcf0707 mlcf0808 a minute crack is acceptable l less than r3.5 mlcf1006 mlcf1007 mlcf1008 mlcf1206 mlcf1208 0 -0.8 20 30 0.5 fd d 15 16 18 20 22 24 15 20 r note 1 0.75 wall thickness t2 25 26 note 1 the dimension r shown in the above drawing is less than 0.75 when the wall thickness t1 1.0 but less than 1.0 when the wall thickness t2 is larger than 1.5 28 30 31 32 indication of serial number 35 38 r-mlcf length inner diameter model code 40 45 50 55 60 remarks 1 the minimum clearance is 0.025 mm when the preferred shaft and
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4 4-1 introduction of materials and products for applications this high performance sliding bearing uses base materials such as polyimide pi polyamideimide pai polyphenylensulfide pps polyacetal pom polyamide pa polyethylene pe featuring the fluoro plastics ptfe as a main material bearings piston rings and seal rings with unique characteristics of each base plastics can be manufactured according to orders table 1 allowable pressure feature and applications properties base resin grade bearee fl 3000 bearee fl 3030 bearee fl 3700 bearee pi 5001 bearee as 5000 bearee dm5030 bearee ny 5000 bearee uh 3000 ptfe ptfe ptfe pi pps pom pa pe allowable pressure characteristics mpa 7 7 7 50 20 10 20 5 kgf/cm2 70 70 70 500 200 100 200 50 fluoro plastics standard material suitable material for the soft material suitable for use in water suitable for conditions of high pv standard material for extrusion forming highly economical for the low pv highly economical for the low pv highly economical f
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introduction of materials and products for applications 4-7 sliding materials with electrical conductivity preventing electrostatic charges this material has not only excellent friction and wear characteristics but also has electrical conductivity utilizing this material as bearings for which anti-static properties are required the grounding device could be removed unlike conventional carbon brushes these materials are less prone to cracking or chipping they also operate more quietly
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introduction of materials and products for applications 4-14 sound damping material for curtain walls tall buildings constructed with curtain wall structures require a sliding material to smooth the relative movement between the steel frame and other building materials movement caused by differences in thermal expansion earthquakes wind etc is smoothed eliminating jarring sounds ntn engineering plastics include materials for this purpose table 14 features grade bearee fl 3000 bearee uh 3954 bearee fl 7075 features low coefficient of friction with no lubrication prevention of jarring sound between metals high load carrying capability superior weather resistance resistant for most of chemicals fire or flame retardant capability superior electric insulating characteristics superior shock resistance can be applied in this layers to complicated shapes refer to the test data bearee fl3000 bearee fl7075 page 55 page 57 washer
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materials for bearing applications table 18 injection molding materials grade base resin characteristics applications bearee pi 5001 pi excellent wear resistance sliding bearings washers piston rings sliding bearings thrust bearings bearee pi 5010 pi non-abrasive to soft mating materials bearee pi 5022 pi precision moldable picker fingers electrical and electronic parts bearee pi 5030 pi high mechanical strength gears retainers bearing cages bearee pi 5040 pi high rigidity and electrical conductivity gears heat insulating sleeves bearee ai 5003 pai excellent impact resistance high mechanical strength excellent friction and wear properties high mechanical strength small drop in heat resistance due to water absorption excellent impact resistance excellent resistance against abrasive wear heat insulation electrical and electronic parts picker fingers sliding bearings washers bearee ai 5017 pai bearee uh5000 pe sliding bearings bearee uh5041 pe excellent sliding properties at low pressure
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6 design and selection for bearing applications 6-2 estimation of wear the life of an ntn engineering plastics bearing is defined by the wear of sliding surface as with an ordinary plain bearing the amount of wear varies with operating conditions such as sliding velocity pressure type of motion surface roughness of mating material and operating temperature generally the estimation of wear is given by the following formula rkpvt where r the amount of wear mm k wear factor mm min mpa m h p pressure mpa v sliding velocity m min t time h surface roughness of the mating material influences the wear of the ntn engineering plastics bearing therefore finish the surface to 0.1 to 0.8a moreover ntn recommends the hardness of shaft to be hrc 22 or higher since it is possible to reduce the wear when the shaft is harder
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technical reference 7-3 friction coefficient the friction coefficient of plastic sliding bearings can vary widely in application conditions table 23 shows the friction coefficients and test conditions for typical material grades of ntn engineering plastics table 23 friction coefficient of ntn engineering plastics materials test condition materials test type mating material face pressure sliding velocity m/min mpa 1.0 10.0 lubrication friction coefficient ambient temperature °c room temperature 0.13 bearee fl3000 thrust suj2 none bearee fl3030 thrust sus304 1.96 36.0 none room temperature 0.18 thrust bearee pi 5001 thrust suj2 1.0 10.0 none room temperature 0.3 suj2 0.5 128.0 none room temperature 0.1 bearee uh5041 thrust suj2 1.0 10.0 none room temperature 0.12 thrust bearee as5053 thrust a5056 0.25 3.4 none 165 0.13 a5056 0.35 2.8 none 200 0.09 bearee pk5900 thrust sus304 1.0 10.0 none room temperature 0.28 bearee ny5000 thrust suj2 0.3 32.0 none room temperature 0.21 thrust bearee dm
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8 application examples piston seal ring bearee fl 3000 fl 3030 piston seal ring for car air conditioner compressor thermostat spindle thrust washer type tw cover seal for spindle bearee fl3040 sleeve wax vessel ml bearing control lever for construction machine seal for thermostat spindle of radiator friction pad bearee fl 3000 hinge for agricultural machine piston ring bearee fl 3030 front fork for motorcycle 58
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company name/division your name phone fax ntn engineering plastics application inquiry items 1 equipment 2 application 3 ambient temperature 4 ambient humidity 5 environment 6 type of load 7 type of motion 8 operating time 9 speed 10 sliding velocity 11 load 12 pressureseal ring 13 lubrication dimension 14 shaft material hardness roughness dimension 15 housing material hardness roughness max min air water sea water static dynamic shock vibration repetition other rotation rocking oscillation other h/day cycle/min rpm m/min axial radial n kgf mpa kgf/cm2 °c confirmation 16 remarks c.r r groove dimension for seal ring ø ø ø bushing thrust washer 64
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