Note: This calculator initially assumes dry and perfect threads made from steel and/or zinc plated. Put a 2 foot diameter handwheel on it and your hand moves 75 inches for every revolution (circumference). See Torque Force Design Equations webpage and torque chart page for recommended fastener torque and equation data. Torque = Force x Distance = (Rotational Force acting on a ball bearing) x (radius of ballscrew) So you can calculate the rotational vector component of force based on torque and the radius of the ballscrew. Screw Thread Design Screw Thread Fundamentals A screw thread is defined as a ridge of uniform section in the form of a helix on either the external or internal surface of a cylinder. Imperial UN: (Imperial Unified National thread form) A standard that describes the shape of an internal or external thread using imperial inch dimensions. document.write(' ') Sign up for an account to receive full access to all calculators and other content. The Bolt Pattern Force Distribution Calculator allows for applied forces to be distributed over bolts in a pattern. d = d 0-(P/2) d = d c-(P/2) With these equations, we can calculate the torque required to lift the load by a Screw Jack. GD&T Training Geometric Dimensioning Tolerancing µ = Coefficient of friction, between the screw threads and the stand threads.. As discussed earlier, since the calculations involved with a screw jack is similar and can be compared to that of an inclined plane, we can consider the external applied force to be horizontal. linear force * thread pitch = torque / radius [M/r = force at radius] * circumference of lead screw F = 2*π*M/p * (1-k) //k stands for coefficient of friction between lead screw and nut) Radius falls out of equation, which seems fine as force is provided by torque, which is radius agnostic. This fastener bolt torque calculator will Estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions. ME EN 7960 – Precision Machine Design – Ball Screw Calculations 4-10 Fixed-Supported Mount Source: THK Co., Ltd. So you use the screw material to get your elastic modulus for tension and for shear. (N, lbs), © Copyright 2000 - 2020, by Engineers Edge, LLC www.engineersedge.com All rights reserved Excel App. Both lateral (single and double shear) and withdrawal capacities can be determined. View Profile View Forum Posts Visit Homepage Diamond Join Date Dec 2003 Country UNITED STATES State/Province Washington Posts 4,994 Post Thanks / … When the nominal diameter (d 0) and the core diameter (d c) of the screw thread is given, then the mean diameter of the screw, d = (d 0 + d c)/2. Ball Screw Home Page. Axial Bolt "Clamp" Force 1) Enter known number values (two inputs minimum) within center located input boxes. // -->, Bolt Preload Tension Equation and Calculator, Torque vs Tension Bolts Table Chart SAE J429 Bolts, GD&T Training Geometric Dimensioning Tolerancing. Thread Pitch: Thread Series: Standard & … See Torque Force Design Equations webpage and torque chart page for recommended fastener torque and equation data.. This calculator will calculate torque given the lead screw Advertising Center Pitch P=1.25 mm=0.0125m, and 4. Engineering Forum This fastener bolt torque calculator will Estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions. // --> The following are to links of engineering resources, tools, articles and other useful data. Internal threads refer to those on nuts and tapped holes, while external threads are those on bolts, studs, or screws.