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Oiles Drymet ST Oil-impregnated polyacetal 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 −40〜+120 24.5(137){250(1,400)} 1.15{69} 3.25{1,990} 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) (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. Image 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]). ※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/mm{2 kgf/cm2} % Hv Oil-impregnated polyacetal layer Back metal layer Sliding surface Sintered bronze layer Feature ●Serviceable without the need for lubrication and demonstrates low coefficient of friction and superior load performance. ●Demonstrates superior wear resistance in applications where oil film is seldom produced such as reciprocating motions, oscillation, frequent starts and stops, etc. ●Thin bearing allows compact design. ●Superior dimensional stability, mechanical strength, and thermal conductivity. ●The standard products and plate material of various sizes are available. 137Selection Guide Product Air Bearings Metallic Bearing Multi-layer Bearing Plastic Bearing Information Technical Corporate Profi le Information Slide Shifter