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Setting Driving Force And Calculating Service Life Setting Driving Force Formula for calculating loads and driving forces Coefficient of friction ƒÊ 0.17 Installation condition Erecting Lateral Hanging Type S Type 0.15 0.30 0.15 Others ¦Do not use the STC20 or SE type in the lateral or hanging condition. The driving forces differ with the shift table installation conditions and types of the slide shifters. The typical load conditions and examples of calculating the driving forces are shown below. Take note of them. When setting the driving force, find the load applied to each table first using the formula shown below, and select a proper table in the allowable load table of each series. Then, calculate the driving force from the found load using the formula shown below. ¡Four erecting dual-axis tables ¡Four erecting dual-axis tables ¡Four lengthwise vertical @dual-axis tables ¡Four lengthwise horizontal @dual-axis tables Load calculation Application form Formula Driving force Application form calculation Formula Driving force calculation Formula Load calculation Formula S Type A=B=C=D=W/2~L3/L1 E=W/2{W~L2/L0 iL2„L0/2j G=|W/2+W~L2/L0 F=H=O iL0/2„L2j F=|W/2+W~L2/L0 G=H=O iL0/2L2j G=F=H=O B Type A=B=C=D=W/2~L3/L1 E=H=W/4{W/2~L2/L0 F=G=|W/4{W/2~L2/L0 S Type A=B=C=D=W/2~L2/L0 E=G=W~L3/L1 F=H=O A=W/4|W/2~L0/L1 B=W/4|W/2~L0/L1 C=W/4{W/2~L0/L1 D=W/4{W/2~L0/L1 Driving force = F, safety ratio = S (standard value: 1.5 to 2.5) F = (ƒÊ1A{ƒÊ2B{ƒÊ3C{ƒÊ4D{nFs) ~ ‚r The obtained value is a practical driving force. This formula applies to the case where the driving force position is at the table center. Driving force = F, safety ratio = S (standard value: 1.5 to 2.5) F = (ƒÊ1A{ƒÊ2B{ƒÊ3C{ƒÊ4D{nFs{ (¦nMs) {ƒÊ1E{ƒÊ2F{ƒÊ3G{ƒÊ4H) ~ ‚r Add the (*nMs) value when the metal scraper is used. The obtained value is a practical driving force. }W (weight) is added to the value of the lengthwise vertical tables. This formula applies to the case where the driving force position is at the table center. A=W/4{W/2~L2/L0|W/2~L3/L1 B=W/4|W/2~L2/L0|W/2~L3/L1 C=W/4|W/2~L2/L0{W/2~L3/L1 D=W/4{W/2~L2/L0{W/2~L3/L1 B Type A=B=C=D=W/2~L2/L0 E=F=G=H=W/2~L3/L1 A to H: Load applied to each table ƒÊ=Coefficient of frictioniƒÊ1 and ƒÊ2 are coefficient of frictions of the tables.) n: Number of tables Fs: Seal friction, Ms: Metal scraper friction See the description for the values of Fs and Ms. L1 L0 A B D W C L3 G C L0 L2 L1 H D B A F E W L1 L0 L3 L2 A B D C W W L1 L3 G C H D B F A E L2 L0 325Selection Guide Product Air Bearings Metallic Bearing Multi-layer Bearing Plastic Bearing Information Technical Corporate Profi le Information Slide Shifter