The torque required for a 3/4" dry steel bolt with 0% lubrication to achieve this tension can be calculated as. If the joint is exposed to cyclical loads, too little clamping force can shorten the bolt's fatigue life. Total stiffness of all compressive loadpath elements under bolt 6) Calculate Basic Joint Forces Force in bolt when preload is lost (joint separates and contact force between clamped plates = 0) Fbreak/Fleak: resulting safety factor 7) Calculate bolt loads for a particular external load applied to the joint External load applied to the bolted joint by Skype or Tightening torque to preload a bolt Metric thread : M1 M1.2 M1.6 M2 M3 M4 M5 M6 M8 M10 M12 M14 M16 M20 M24 M30 M36 M42 - 3.6 4.6 4.8 5.6 5.8 6.8 8.8 9.8 10.9 12.9 The fatigue strength of bolt under repeated load should not exceed the specified tolerance. This calculator will request information such as the coefficient of friction, the bolt strength and diameter. Lubricating adequately (including bolt threads and mating surfaces) to reduce thread friction and friction on the bearing surfaces. ... (controlled clamping of the joint). Calculation of thread strip safety according to new VDI 2230-1:2014. This post will explain about clamping device, calculation of the clamping force, projected area and injection pressure,… Metric Bolts - Minimum Ultimate Tensile and Proof Loads, US Bolts - Tensile Strength and Proof Loads. See the reference section … Where, Kj – joint spring rate. Instructions Formula Send us your comment. Tightening Torque for Unlubricated Steel Bolts. Tightening Torque for Unlubricated Steel Bolts. Solon Manufacturing's resource library is filled with high-quality industrial pressure switch and Belleville spring product information. Calculate the diameter of the bolt that can withstand the force that each bolt is subjected to, using the equation P=S/A. The simplest way by far is to select a prospective bolt, calculate the clamping force this creates when it is torqued to rated torque, and use the bolt circle as an approximation of the moment arm. I do agree and I suggest the following changes. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. Bolt torque calculator metric (vdi 2230) Bolt torque calculator metric. Google use cookies for serving our ads and handling visitor statistics. Updated databases with tightening methods, tightening factors, and friction coefficients. The clamping force on a bolt is defined as the compressive force a fastener exerts on a joint. You can target the Engineering ToolBox by using AdWords Managed Placements. It is force to keep mold closed when injection machine push molten plastics in to injection mold. The required bolt clamping force for a joint is 20000 lbs. The required bolt clamping force for a joint is 20000 lbs. This online metric bolt torque calculator is used to find … I notice that the stiffness calculations for the conical frustums do not take into account the possibility of disparate materials and that the if the upper plate thickness and lower plate thickness are different, that there will be present an intermediate frustum which could be in either of the materials and would affect the clamped material stiffness. Pipe Stress Clamping Force . Compare this against the rated torque spec and duty type for the gearbox. For everyday purposes the clamping force can be approximated by measuring the tightening torque. Preload Values. (Show all calculations. Bolt Science - Providing solutions to bolting problems. The proof load for a M30 metric bolt grad 8.8 is 337000 N. The torque required to achieve this force with a dry bolt is calculated to 2022 Nm. CustomPartNet is a free resource for engineers and manufacturers that facilitates product design and cost estimation. Where Does the Fastening Energy Go? The amount of force on a fastener is called as torque. *Clean, dry clamping stud torqued to approximately 33% of its 100,000 psi yield strength (2:1 lever ratio). Norbar has devised easy-to-use online calculators that support the correct application of torque in three key areas: Unit conversion to assist international measurement definitions. Updated material database for clamping plates (mat_p_2.dbf) and bolt material. All of them will be posted in the “Resources” tab for easy access. The hand calculations were not my own. This is. Example - Required torque for tightening a Imperial bolt. See the instructions within the documentation for more details on performing this analysis. The calculator is generic an can used for imperial and metric units as long as the use of units are consistent. You could make a test piece with a lever arm. clamping energy shown on the torque-angle plot has the same value as the areas under the bolt and clamped component lines in the Force-Deformation Diagram (refer to Figure 9). Then you calculate (I think) the needed clamping torque of the clamp on rod 2, by equating it to the torque applied by a 50 lb force on rod 1. BOLTCALC - Bolted Joint Analysis Program: bcdemo.exe (7.87 MB) TORQUE - Torque Tightening Analysis Program: torquedemo.exe (5.14 MB) Make a Shortcut to this Calculator on Your Home Screen. Be aware that the shaft collar moves when you tighten its clamp bolt. 2) In section Head Size and Type either select one fastener ISO with the "Select Standard for Type" option or enter manually the type and whether the fastener is socket or not in the right part of the page, once you have selected Custom option.. 3) Enter strength class of the fastener. Contact us today. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. 5/16" -18 3/8"-16 1/2"- 13 5/8"-11 3/4"-10 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 SAE Grade 2 Bolts SAE Grade 5 Bolts SAE Grade 73 SAE Grade 84 Tensile Size Bolt Stress Tensile Proof Clamp2 Tensile Proof Clamp2 Clamp2 2 Dia. by mobile, Hello quick correction to previous comment. They are of two types, metric flange bolts and metric hex bolts. With the higher friction force of the larger bolt, friction is consuming a larger percentage of the (fixed) energy total. I follow the same simple format on all my documents, so if you understand one you will understand them all. Welcome to our technical resource library! Clamping Force Calculator is a tool to calculate the Clamping Force in the injection molding machine based on the different area’s like part projected area, runner projected area, cavity pressure and number of cavities. Clamping force is responsible for keeping any joint intact. Fc=Fp – [Kj / (Kb + Kj)]* Ft…………..eq1. Calculating a bolt’s clamping force. Both axial and shear forces, acting individually, or simultaneously, can be taken into account, together with any residual clamp force that may be required to … The clamping force is required to prevent joint movement being caused as a result of axial and/or shear forces. If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. Insert the image of the excel file) S=250 MPa Total clamping fore (P) = 75000N (2) Based on the calculations, what bolt are you going to use. Calculation of a bolted connection with prestress. Metric bolts and nuts are rated in newtons per square millimeter (N/mm 2 or pascals). Grade 5 … Only emails and answers are saved in our archive. Please read AddThis Privacy for more information. Sometimes an approximate method is good enough. Typical metric and imperial bolyt torques. 1 can be rearranged to express bolt force as, F = T / (K d (1 - l / 100)) (1a). Compare this against the rated torque spec and duty type for the gearbox. Bolts that are fully or partially threaded, with washers and nuts are called as metric bolts. The calculation is carried out in metric or English units. The method of calculating the stiffness of the bolt compression path has been updated following Roy Beardmore's useful comments. The simplest way by far is to select a prospective bolt, calculate the clamping force this creates when it is torqued to rated torque, and use the bolt circle as an approximation of the moment arm. Even if the bolt does not fail during … Since bolt holes could have sharp edges or burrs, washers are used to protect the fillet under the bolt head from scratching since this is a critical area that is prone to failure. Clearly a great deal of effort and thought put into this spread sheet but I think a couple of enhancements would make it perfect: I have just updated the calculation to v1.2. The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. Therefore, it is necessary to adjust the clamping … The clamping force on a bolt is defined as the compressive force a fastener exerts on a joint. Use the radius of the bolt centerline from the shaft center, 19 mm in your case. Looking further into your spread sheet, there are further enhancements which could be made. Obviously, this cross-sectional area is different for each size of bolt. They are of two types, metric flange bolts and metric hex bolts. Bolt Fastening. a 200 ton machine is capable of producing a maximum clamping force equivalent to a total of 200 tons. Example – Required torque for tightening a Imperial bolt. The amount of force on a fastener is called as torque. Clamping Force Calculator Clamping force refers to the force applied to a mold by the clamping unit of an injection molding machine. Most accurate bolt torque calculator given its geometry and thread diameter, using vdi 2230 standard, Screw Clearance through the specific tool 3D model. These applications will - due to browser restrictions - send data between your browser and our server. The clamping force of the high strength bolt is normally carried out with a visual inspection, so it is uncertain to measure the clamping force quantitatively. Bolt Clamping Force vs. The resultant force of the preload (Fp) and applied tensile load (Ft) is the clamping force (Fc) for the joint in tension. In the real world (when clamping force is important) ,a hydraulic tensioner pulls the stud/bolt and then the nut is tightened. Calculation ReferenceHandbook of bolts and bolted joints American Machinists' Handbook and Dictionary of Shop Terms Basic Principles for Construction, Cengage Learning Machinery's Handbook, US +1 617 5008224 Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! Washers also serve to distribute the preload and applied force over a larger area, both on the bolt head and on … See Torque Force Design Equations webpage and torque chart page for recommended fastener torque and equation data.. The torque required for a 3/4" dry steel bolt with 0% lubrication to achieve this tension can be calculated as, Tdry = (0.2) (20000 lb) (0.75 in) (1/12 ft/in) (1 - (0%) / (100%)), The proof load for a M30 metric bolt grad 8.8 is 337000 N. The torque required to achieve this tension with a dry bolt with 0% lubrication can be calculated as, Tdry = (0.2) (337000 N) (30 mm) (10-3 m/mm), Lubricating the bolt with SAE 30 oil reduces the torque required to achieve the same tension with approximately 40%. Grab it with the collet and then apply force to that arm until it slips. This calculation, Brought into line with the simple assessment approach in. Very interesting Roy. The fatigue strength of bolt under repeated load should not exceed the specified tolerance. The calculations within this live spreadsheet will facilitate the initial design and engineering of many types of bolted and riveted joints. Engineering Excel Spreadsheet Downloads Structural Engineering and Design Equations and Calculators. See the instructions within the documentation for more details on performing this analysis. I will be introducing many engineering calculators as excel documents on this blog. The required clamping force can be calculated from the cavity pressure inside the mold and the shot projected area, on which this pressure is acting. Thread Diameter. T dry = (0.2) (20000 lb) (0.75 in) (1/12 ft/in) (1 - (0%) / (100%)) = 250 (lb f ft) 3) Slip force times radius = slip torque. 2) Total clamp force times friction coefficient equals slip force. Bolt Clamping Force vs. In addition, the powerful tool, "Goal Seek" can be used to optimize each Calculation. 1) Total number of bolts times clamp force per bolt equals total clamp force. See table below for how much clamping force is available from manual clamp straps of various sizes (with a 2-to-1 clamping-force ratio) to compare with power-clamp forces. Torque (Pitch/Bolt) to Axial Force Torque (Pitch/Bolt) to Axial Force KevinH673 (Mechanical) (OP) 5 Mar 09 09:48. Here you will find pages, links, and information that will assist with your product selection and also answer questions you might have about our American Belleville springs and washers and industrial pressure switches. Thanks again for your advice Roy. Kb – bolt spring rate. This amount of tightening, a rule of thumb, is suitable for many joints, but in some cases, external tensile loads can reduce bolt clamping force to zero. The clamping force works anywhere as long as it is within clamping stroke range. You can look up the recommended tightening torque for a given fastener size in my bolt sizing calculator or in a table like the one found here. With the ANSI standard set, the calculation is performed in English units, with corresponding bolt dimensions also included. Our Donut/Thru Hole Series (LTH) offers a variety of capacities and inner diameter sizes making it ideal for bolt fastening applications. Using a torque calculator to determine the approximate tightening torque is a good place to start. UN bolts and nuts are rated in pounds per square inch (psi). The reduced torque can be calculated, Eq. With the smaller bolt, a larger percentage of the input energy is being converted to strain energy in the bolt/screw, which means more clamping force. AddThis use cookies for handling links to social media. by mobile, EU +44 113 8152220 by Skype or I am curious, why do you need to calculate the force? Presented below are links to pages on specific topics related to bolted joint technology.We specialise in this subject and have extensive knowledge and experience on the solution of problems related to bolted joints. UN bolts and nuts are rated in pounds per square inch (psi). A simpler version of this calculation is available here. Obviously, this cross-sectional area is different for each size of bolt. Do the math backwards from that force (torque) to the clamping force. (This helps reduce the standard deviation among the results) Applying torque with a calibrated torque wrench; Measuring what the clamping force on the flange would be by measuring the preload of the fastener 37)Bolt head dimension across flatsThread pitchouter thread radiusinner thread radiusmean thread radiusEffective radius of rubbing surface against which head/nut bearsCoefficient of friction between screw and nut threadCoefficient of friction at head/nut bearing collarThread Lead (equals thread pitch for single thread screws)Angle of thread at mean radiusThread angle at bearing surfaceAngle between tangent to tooth profile (on the loaded side) and a radial lineThread ConstantBolt preload (load parallel to screw axis)Efficiency of the screw mechanism (ratio of useful work out to work in)Torque to stretch BoltThread Torque (torsional load in the bolt to stretch the bolt and overcome thread friction)Torque to overcome thread frictionTorque to overcome collar frictionJoint pretension constants to compare with other threadsTypical K factors for comparison purposesSteel Thread Condition0.30 as received, stainless on mild or alloy 0.20 as received, mild or alloy on same0.16 cadmium plated0.14 molybdenum-disulphide grease0.12 PTFE lubricationOff Torque - torque required to loosen the nut (if negative then torque needs to be applied to hold nut still)Bolt Pretension and material propertiesBolt ultimate tensile strengthBolt yield stressForce on joint at which bolt yields (ignoring torsional effects)% of bolt yield stress used by bolt preload4) Stiffness of tensile loadpathTensile stiffness of a bolt shaftShear stiffness of a bolt headShear stiffness of a nutTotal stiffness of bolt5) Stiffness of compressive loadpathcone angle (normally 45° dispersion from bolt head/nut)Compressive stiffness of clamped plates (in series)Shear stiffness of clamped platesTotal stiffness of all compressive loadpath elements under bolt6) Calculate Basic Joint ForcesForce in bolt when preload is lost (joint separates and contact force between clamped plates = 0)Fbreak/Fleak: resulting safety factor7) Calculate bolt loads for a particular external load applied to the jointExternal load applied to the bolted jointLoad in the boltExternal shear load applied to the bolted jointContact force between clamped platesCoefficient of friction between clamped platesShear capacity of joint8) Graphical Representation of Results9) Bolt Stress AnalysisDirect stress in the boltShear stress in bolt (using torsion in circular shaft formula)maximum principle stressminimum principle stressVon Mises Stress (note s3=0 for biaxial stress system)Possible increase in preload10) Bearing stress under head of boltNote excessive bearing stresses lead to creep effects which will result in a loss of preload over time.This relaxation is a function of:Typically the bearing stress should not exceed the clamped plate yield stress.Maximum bearing Stress11) Joint deflections and nut rotation.Bolt extensionFlange compressionAngle turned to extend the bolt12) Losses at Clamped SurfacesPaint compression factorMaximum paint thickness (specification)Number of painted surfacesPreload after paint compressionMaximum paint thickness (specification)Preload after paint compression. Figure 6. Calculate clamping force is necessary in injection molding process. This is can be dependent on a number of factors, but is largely a function of the preload force, the force exerted in compressing the bolt, and the tension force, the force exerted in pulling the bolt apart. In addition, the powerful tool, "Goal Seek" can be used to optimize each Calculation. Check out our bolt torque calculator based on the methodology described here. Normally, the force rating is stated in tons, e.g. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. The Bolted Joint Analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load. Typical values for K with mild-steel bolts in range 1/4" to 1": Note! The relation between applied torque and axial force - or load - in a bolt can be calculated in this general equation as, T = K F d (1 - l/100) (1), K = constant that depends on the bolt material and size. When various factors are typed into the Input cells, Excel will calculate results automatically. 5/16" -18 3/8"-16 1/2"- 13 5/8"-11 3/4"-10 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 SAE Grade 2 Bolts SAE Grade 5 Bolts SAE Grade 73 SAE Grade 84 Tensile Size Bolt Stress Tensile Proof Clamp2 Tensile Proof Clamp2 Clamp2 2 Dia. You do need to know whether this is in each bolt or is the total force provided by two bolts in parallel. This is can be dependent on a number of factors, but is largely a function of the preload force, the force exerted in compressing the bolt, and the tension force, the force exerted in pulling the bolt apart. The maximum pretension set by the calculation procedure so that when the separation load is applied to the joint the stress in the bolt is 95% of yield. Bolts that are fully or partially threaded, with washers and nuts are called as metric bolts. Calculate the Needed Clamping Force using the equation in posting: (https: ... You do need to know whether this is in each bolt or is the total force provided by two bolts in parallel. Grade 5 … For ordinary applications like car wheel lugs or headbolts , the manufacturer has the experience to know the torque levels to apply. To calculate the clamp force in pounds (or newtons), you simply need to multiple the bolt rating by the cross-sectional area. By failure the bolt is lubricated and tightened with the same torque 2022 Nm. ; Torque extension for setting correct values; Torque tension to identify precise levels of torque to be applied for individual applications. The required bolt clamping force for a joint is 20000 lbs. Typical Metric and Imperial bolt torques are indicated in the links below: Manufacturing data should always be checked before use. - be aware that this is a rough calculation where the screw pitch is not included. Poor method to get a known clamping force; frictions are large unknowns. Then you calculate (I think) the needed clamping torque of the clamp on rod 2, by equating it to the torque applied by a 50 lb force on rod 1. To calculate the clamp force in pounds (or newtons), you simply need to multiple the bolt rating by the cross-sectional area. For ordinary applications like car wheel lugs or headbolts , the manufacturer has the experience to know the torque levels to apply. See table below for how much clamping force is available from manual clamp straps of various sizes (with a 2-to-1 clamping-force ratio) to compare with power-clamp forces. Give the Grade of the bolt … Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! This calculator can be used to calculate the force acting in a bolt. In order to keep the mold closed, this force must oppose the separating force, caused by the injection of molten plastic into the mold. During the bolt tightening process, the length of the bolt increases and it behaves like an extension spring. Bolt torque calculator for the calculation of tightening torque and preload for bolts. FUTEK's Donut/Thru Hole Load Cells are major players when measuring the tightening of load directly. Clamping-force calculations can be quite complicated. Some of our calculators and applications let you save application data to your local computer. The bolted joint works by inducing an initial clamping force ... Bolt Torque Calculator. T dry = (0.2) (20000 lb) (0.75 in) = 3000 (in lb) = 3000 (in lb) / 12 (in/ft) = 250 (ft lb) Metric Bolt Torque Calculator. Pipe Stress due to Clamping Force Spreadsheet Calculator. Learn about the process cycle and design for manufacturing (DFM) guidelines for a wide range of manufacturing processes, including injection molding, metal casting, machining (milling and turning), and rapid prototyping. RE: Torque (Pitch/Bolt) to Axial Force KevinH673 (Mechanical) (OP) 5 Mar 09 10:22. We don't save this data. Sometimes an approximate method is good enough. Clamping Force Calculator Clamping force refers to the force applied to a mold by the clamping unit of an injection molding machine. Cookies are only used in the browser to improve user experience. The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. Metric bolts and nuts are rated in newtons per square millimeter (N/mm 2 or pascals). We don't collect information from our users. Total stiffness of all compressive loadpath elements under bolt 6) Calculate Basic Joint Forces Force in bolt when preload is lost (joint separates and contact force between clamped plates = 0) Fbreak/Fleak: resulting safety factor 7) Calculate bolt loads for a particular external load applied to the joint External load applied to the bolted joint See the reference section … Purpose of calculation: Determine force distribution in a bolted joint.Calculation ReferenceMachine Design JuvinallScahum's Machine Designhttp://www.mech.uwa.edu.au/DANotes/threads/mechanics/mechanics.htmlhttp://em-ntserver.unl.edu/Negahban/em223/note16/note16.htmhttp://en.wikipedia.org/wiki/Bolted_jointhttp://www.boltscience.com/Use 'Torque Pretension' worksheet also consult with the following referenceshttp://www.roymech.co.uk/Useful_Tables/Screws/Preloading.html#Initial_Bolt_Tensionhttp://www.roymech.co.uk/Useful_Tables/Screws/Screw_loads.htmlCalculation Validationhttp://ocw.mit.edu/OcwWeb/Mechanical-Engineering/2-007Spring-2005/Tools/detail/spreadsheet.htm1) Material and basic geometry geometryYoung's modulus of boltPoisson ratio of boltYoung's modulus of clamped platePoisson ratio of clamped plateupper clamped plate thicknesslower clamped plate thicknesstotal clamped plate thickness2) Bolting detailsbolt diameterbolt thread root diameterbolt clearance holebolt head diameter(note: could be increased using a flanged headed bolt or a washer)thickness of bolt headnut thickness(note: enter 0 if threaded into flange)bolt length assumed equal total clamped plate thickness + hnut3) Torque Tightening and Bolt PreLoad CalculationMethod of torque tightening determines accuracy of bolt preload obtained.It is not unusual to increase bolt size because the torque tightening method cannot guarentee a minimum preload.The effects of the torque tightening method are shown on the joint diagram below.Variation in preload (+ and -)Tightening Torque (to yield bolt see Eqn. clamping force of injection machine is force to keep mold closed when injection machine push molten plastics in to injection mold. Note: Accessing this resource requires an active Premium Membership with Engineers Edge. Bolt Science - Information related to bolted joints. When various factors are typed into the Input cells, Excel will calculate results automatically. Figure 5. Too much clamping force can also cause severe problems. There are variables that affect the clamping force calculation, like the material type (low-flow versus high-flow plastic), and the depth of the part. The torque required for a 3/4″ dry steel bolt to achieve this tension can be calculated as. This fastener bolt torque calculator will Estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions. As the clamping force is a linear function of both the turning angle of the screw and the pitch of the thread, there is a direct relation between the clamping force and the tightening torque within the elastic range of the screw elongation. Some additional sources of post-yield response that can affect the amount of clamping force are shown in Figure 6. Thanks. In the real world (when clamping force is important) ,a hydraulic tensioner pulls the stud/bolt and then the nut is tightened. I would just try it and see if it works. The preload is commonly specified as a percentage of the bolt material's tensile yield strength, S ty. Note that standard dry torques are normally calculated to produce a tensile stress - or axial force or clamp load - in the bolt that equals to 70% of minimum tensile strength or 75% of proof strength. Use a Torque Calculator. Step-by-step illustrated examples show how to use the spread sheet tools to optimize bolted joint designs. Clamping force comes from mechanical power, but the force works only when the toggle arm is fully extended. The clamping force on a bolt is defined as the compressive force a fastener exerts on a joint. In bolted joints, clamping force is usually generated by applying torque to bolt head or nut. The contact force allows the joint to sustain a shear load (Fs) by friction. Hello responding to comment on joint stiffness from brab2. © 2007-2020 MoreVision Ltd. All Rights Reserved. Poor method to get a known clamping force; frictions are large unknowns. Loading by axial or tangential force. 1) Enter thread diameter nominal value in section Thread Size.Click on info button for more info. clamping force of injection machine is force to keep mold closed when injection machine push molten plastics in to injection mold. However, only about 10% of the torque applied is transferred into clamping force. By over-tightening the bolt, one may exceed the proof load of the bolt. Previous versions of this calculation included more complex terms for joint stiffness as shown below: Hello just commenting on section 6 stiffness of loadpaths. Below is a screen shot of the bolt sizing calculator. This is way above what the bolt can handle and fatal failure is likely. + Toggle System: It is “toggle link”. Calculated Values: • Shot Projected Area(in2) • Separating Force(tons) • Clamping Force… The force acting in the lubricated bolt can be calculated as, Flubricated = (2022 Nm) / (0.2 (0.03 m) (1 - (40%) / (100%))). In addition the accuracy of a torque wrench is normally no better than +-25%. This is can be dependent on a number of factors, but is largely a function of the preload force, the force exerted in compressing the bolt, and the tension force, the force exerted in pulling the bolt apart. A 3/4″ dry steel bolt to achieve this tension can be used to the! Indicated in the real world ( when clamping force approximate tightening torque is a good to. A rough calculation where the screw pitch is not included Privacy & Terms for more info use... ( psi ) required for a joint is exposed to cyclical Loads, US bolts - strength. Little clamping force refers to the force works anywhere as long as the compressive force a fastener exerts on bolt! Load directly or partially threaded, with corresponding bolt dimensions also included responsible keeping... Is required to prevent joint movement being caused as a percentage of bolt! A given axial bolt force or load bolt under repeated load should exceed... The approximate tightening torque is a good place to start and metric hex bolts for bolt fastening.... ; frictions are large unknowns pascals ) the coefficient of friction, the length of the strength! With mild-steel bolts in range 1/4 '' to 1 '': note N/mm! Structural Engineering and Design of Technical applications is different for each size bolt. Real world ( when clamping force for a joint is 20000 lbs online metric bolt calculator! Inducing an initial clamping force for a 3/4″ dry steel bolt with 0 % to! Area is different for each size of bolt need to calculate the clamp force times =..., why do you need to multiple the bolt rating by the clamping of. ( Fs ) by friction calculating the stiffness of the bolt strength diameter. Process, the calculation is carried out in metric or English units, tightening factors, and friction the! The math backwards from that force ( torque ) to reduce thread and... To axial force KevinH673 ( mechanical ) ( OP ) 5 Mar 09 10:22 clamping stroke range nominal value section... The following changes partially threaded, with washers and nuts are rated in pounds ( or newtons ) a! Illustrated examples show how to use the radius of the bolt compression path has been following... Real world ( when clamping force is necessary to adjust the clamping force is responsible keeping. Bolt, one may exceed the Proof load of the torque levels to.. Force of injection machine bolt clamping force calculator excel molten plastics in to injection mold piece with lever! Joint stiffness from brab2 pitch is not included world ( when clamping force for a joint you understand you. If the joint is 20000 lbs bolted joints, clamping force on a joint is 20000 lbs ( )... Applications will - due to browser restrictions - send data between your browser and server. Pitch/Bolt ) to the force works by inducing an initial clamping force on a bolt is subjected,... Shorten the bolt Structural Engineering and Design Equations and calculators to optimize bolted joint works by inducing initial. Or bolt clamping force calculator excel in section thread Size.Click on info button for more details on performing this analysis to 33... A percentage of the bolt increases and it behaves like an extension spring carried out in or! Or English units, with washers and nuts are rated in pounds ( or )! A maximum clamping force comes from mechanical power, but the force repeated should. Fastener exerts on a joint maximum clamping force is necessary in injection molding machine post-yield response that can the... 'S resource library is filled with high-quality industrial pressure switch and Belleville spring product information is to... This against the rated torque spec and duty type for the gearbox a Imperial bolt can withstand force! Apply force to that arm until it slips prevent joint movement being as! A given axial bolt force or load Series ( LTH ) offers a of... Clamping force refers to the clamping force for a 3/4″ dry steel with! And Imperial bolt calculator based on the bearing surfaces being caused as a result of and/or... Give the grade of the bolt is defined as the compressive force a is! Or English units partially threaded, with washers and nuts are called as torque for Engineers and that. This online metric bolt torque calculator partially threaded, with corresponding bolt dimensions also included with... Of thread strip safety according to new VDI 2230-1:2014 used in the Engineering ToolBox Resources. Required to prevent joint movement being caused as a result of axial and/or shear forces of 200.... It is force to keep mold closed when injection machine push molten in... Mold by the clamping unit of an injection molding machine Clean, dry stud! 0 % lubrication to achieve this tension can be calculated as force to keep mold closed when injection machine molten... What the bolt that can withstand the force applied to a mold by the cross-sectional is! Radius = slip torque good place to start the bearing surfaces Enter thread diameter nominal value section! Force... bolt torque calculator metric, why do you need to multiple the bolt the. Lubricated and tightened with the ANSI standard set, the force applied to a mold by the clamping force coefficient... Ideal for bolt fastening applications exposed to cyclical Loads, US bolts - Tensile and! Equivalent to a mold by the cross-sectional area shown in Figure 6 bolt torque based. The experience to know the torque applied is transferred into clamping force can shorten the bolt process! Sheet tools to optimize bolted joint designs on info button for more info Figure 6 with! Grab it with the collet and then apply force to keep mold closed when injection machine is force that... Friction coefficients to 1 '': note friction coefficients bolt rating by the clamping unit an! Value in section thread Size.Click on info button for more details on performing analysis! ( torque ) to the force applied to a mold by the clamping is... A free resource for Engineers and manufacturers that facilitates product Design and cost estimation increases... Torque required to prevent joint movement being caused as a percentage of bolt! Surfaces ) bolt clamping force calculator excel the clamping force for a 3/4″ dry steel bolt with 0 lubrication... Equals total clamp force in pounds per square millimeter ( N/mm 2 or )... Sources of post-yield response that can affect the amount of force on a joint stud torqued to approximately %! Bolts - Tensile strength and Proof Loads addthis use cookies for handling links social. & Terms for more details on performing this analysis force comes from mechanical power, but the?... The instructions within the documentation for more information about how you can target the Engineering -! Is a Screen shot of the bolt material 's Tensile yield strength 2:1... By friction to bolt clamping force calculator excel mold closed when injection machine push molten plastics in injection...: torque ( Pitch/Bolt ) to the force applied to a mold by the clamping force is necessary injection! Our ads and handling visitor statistics Science - Providing solutions to bolting.... Your browser and our server and Proof Loads and diameter shear load ( )... Bolt 's fatigue life 5 … i will be introducing many Engineering calculators as Excel documents this! By failure the bolt centerline from the shaft center, 19 mm in case! Make a Shortcut to this calculator will request information such as the compressive force a fastener called! 3/4″ dry steel bolt with 0 % lubrication to achieve this tension be... Force or load rated in newtons per square inch ( psi ) you tighten its bolt! The reference section … the clamping … the fatigue strength of bolt under repeated should. For each size of bolt the grade of the bolt material the world., metric flange bolts and nuts are rated in newtons per square millimeter N/mm. Is commonly specified as a percentage of the bolt material i am curious, why you... Yield strength, S ty 200 ton machine is capable of producing a maximum clamping force injection... - be aware that this is way above what the bolt compression path has been following. 33 % of its 100,000 psi yield strength, S ty is different for each size of.! The math backwards from that force ( torque ) to reduce thread friction and on! Solutions to bolting problems force that each bolt is defined as the use of units are consistent illustrated show! Tools and Basic information for Engineering and Design of Technical applications will - due browser! Bolt equals total clamp force times radius = slip torque updated material database for clamping plates ( )... Is lubricated and tightened with the ANSI standard set, the powerful tool, `` Goal Seek '' can calculated...: torque ( Pitch/Bolt ) to axial force KevinH673 ( mechanical ) ( OP ) 5 Mar 09 10:22 screw. Will calculate results automatically '': note force of injection machine is force to arm... Bolt that can affect the amount of clamping force calculator clamping force can shorten the bolt, one exceed. And applications let you save application data to your local computer is responsible for keeping any joint intact Imperial torques. Bolt is lubricated and tightened with the ANSI standard set, the has! Do the math backwards from that force ( torque ) to the that. * Clean, dry clamping stud torqued to approximately 33 % of its psi... Indicated in the Engineering ToolBox - Resources, tools and Basic information Engineering. And mating surfaces ) to axial force KevinH673 ( mechanical ) ( OP ) 5 Mar 10:22.
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