9 #DriveLineHarmony www.jbj.co.uk/couplings.html Quick Flex Couplings Torque Calculation QUICK FLEX Coupling Selection Using Newton Meter Torque Ratings To select the correct QUICK FLEX coupling for your application, use the formulas below, the torque ratings on and maximum bore sizes pages 10-13 and speed ratings on pages 35-41 to determine which QUICK FLEX coupling meets the design torque, maximum shaft size and speed rating of your application. If you need further assistance, please contact jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Design Torque (Nm) = Actual torque (Nm) x service factor (See pages 15-17.) Actual Torque (Nm) = 9550 x kW RPM where: kW = Drive kilowatts RPM = Drive shaft revolutions per minute Using Inch-Pound Torque Ratings To select the correct QUICK FLEX coupling for your application, use the formulas below, the torque ratings on 10-13 and the maximum bore sizes pages and speed ratings on pages . 35-41 If you need further assistance, please contact jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Design Torque (in-lbs) = Actual torque (in-lbs) x service factor ( ) See pages 15-17 Actual Torque (in-lbs) = 63025 x HP RPM where: HP = Drive horsepower RPM = Drive shaft revolutions per minute. Helpful Conversion Formulas (Nm ↔ in-lbs) → 1 Nm = 8.85 in-lbs (kW ↔ HP) → 1 kW = 1.341 HP
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