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Oiles Techmet B Polytetrafluoroethylene plastic multi-layer bearings with back metals Service range Lubrication condition Service temperature range ℃ Allowable max. pressure P N/mm{2 kgf/cm2} Allowable max. velocity V m/s{m/min} Allowable max. PV value N/mm2・m/s{kgf/cm2・m/min} Dry −50〜+250 19.5(137){199(1,400)} 2.50{150} 1.45{887} Relief angle Rake angle Nose radius(, mm) Speed (m/min) Cut depth (mm) Feed (mm/rev) carbide too(l JIS) 5〜10゜ 10〜20゜ 0.10〜0.20 60〜200 0.05〜0.10 0.05〜0.20 Lathe turning Condition Cutting tool I.D. class 7 (Note 1) O.D. − Length class 8 to 9 Machining accuracy (bushing) The values in parentheses are static bearing pressures, which are the bearing pressures in applications with no motion or very small motion (≦0.0017m/s [0.1m/min]). (Note 1) Accuracy after press fitting. Classes here are in JIS standard. This product demonstrates satisfactory performance at the slide surface roughness of 6.3 to 12.5 μmRy. Dimensions may change due to thermal expansion, chucking pressure, moisture absorption deformation, etc. High accuracy is ensured if the product is installed on the housing and then ground. Attention should be paid to dimensional variances due to thermal expansion, chucking, and bend of the material. The Oiles Techmet should be ground. If it is reamed, it is difficult to maintain the dimension in mass production. The I.D. machining allowance is 0.2 mm for the diameter. Polytetrafluoroethylene plastic layers with filler Back metal Sintered bronze layer image Sliding surface ※The values shown above are typical values, not the standard values. ※The values shown above are values of back metal. Tensile strength Elongation Hardness JIS Z 2241 JIS Z 2241 JIS Z 2244 380{3,875} 27 107 Mechanical properties N/mm2{kgf/cm2} % Hv Feature ●Serviceable without the need for lubrication. Features superior dimensional stability, mechanical strength, and thermal conductivity with a thin, lightweight, and compact design. ●Demonstrates stable low coefficient of friction and superior wear resistance under high-speed conditions. ●The plastic layers have machining allowance, allowing high dimensional accuracy when the inner diameter is machined. ●The standard products in various sizes are available on order. Please refer to the fitting method of Drymet LF. (P.149, 150) 162 Selection Guide Product Information Plastic Bearing Multi-layer Bearing Metallic Bearing Air Bearings Technical Slide Shifter Information Corporate Profi le