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81-20 Test data W W Journal bearing rotation test <Testing condtions> Bearing dimension : φ35×φ38×R20 Mating material : SUS303 ( surface roughness 1.6μmRy) Pressure: 0.316N/mm{2 3.0kgf/cm2} Velocity : 0.130m/s {7.8m/min} (120rpm) Test time : 200hrs. Journal rotation test <Testing conditions> Mating material : SUS303 ( surface roughness 1.6μmRy) Pressure: 1.96N/mm{2 20.0kgf/cm2} Velocity : 0.047m/s {2.8m/min} (90rpm) Test time : 250hrs. 0.20 0.15 0.10 0.05 0 0 40 80 120 160 200 Coefficient of friction〔μ〕 Test time〔hrs.〕 Oiles 81-20(No oiling) Oiles 81-20(Initial greasing) 0 5 10 15 20 25 30 0.40 0.30 0.20 0.10 0 0 50 100 150 200 250 Coefficient of friction〔μ〕 Polyacetal Oiles 81-20 Wear amoun〔t μm〕 Test time〔hrs.〕 Polyacetal type Oiles 81-20 92 Selection Guide Product Information Plastic Bearing Multi-layer Bearing Metallic Bearing Air Bearings Technical Slide Shifter Information Corporate Profi le