Inputting four calculation variables allows the app to determine. Most accurate bolt torque calculator given its geometry and thread diameter, using vdi 2230 standard, screw clearance through the specific tool 3d model. Once the clamp load is determined, finding the correct torque value for a bolt is one simple calculation away. Bolt torque calculation for flange free download as word doc. Moment of inertia and torque every time we push a door open or tighten a bolt using a wrench, we apply a force that results in a rotational motion about a fixed axis. Record the torque wrench reading, the date of test, and the rock. Tightening torque is not influenced by the bolt length so. Torque in physics, torque can be thought of informally as rotational force. Lubricated refers to fasteners in the as received condition, which is normally a light preservative oil coating on unplated fasteners and no oil coating on plated fasteners. The bolt torque table below provides information such as tension, torque, tpi for the heavy structured bolts against its corresponding bolt sizes ranging from 12 to 1 12.
Running torque should be included in the values listed in the tables because any torque puts shear load on the bolt. How to calculate required t orque a common method of calculating the required target torque uses the formula below. See torque force design equations webpage and torque chart page for recommended fastener torque and equation data. Sep 10, 2018 our bolt torque graphics are undoubtedly essential graphics for operators to keep on hand. A similar table was published in product engineering by arthur korn around 1944. Torque wrench capable of 430 ftlbs of torque or higher if hitch ball manufacturer specifies. This is done to allow a safety buffer so that the bolt does not get too close to the proofload value. The calculator recommends the best torque values and bolt loads for your job as well the recommended bolting pattern based on the bolting system you are. Hytorc bolting software flange bolt torque calculator. Fasteners bolts, nuts and threaded rods torque, tension and loads. Bolt torque calculator calculate required bolt torque. As a reality check if we approximate to a cross sectional area of 7 mm 2 and a load of n that gives a tensile stress of 140 mpa which is below yield even for low tensile steels in this particular context, where torque is known, the thread pitch doesnt come into it as you are calculating based on. Use to determine torque, bolt load and percent yield of maximum load of bolts. The calculator is generic an can used for imperial and metric units as long as the use of units are consistent.
Determining rock bolt or anchor tension using a torque wrench. L length of thread engagement is the length of which the female threads contact the male threads d bolt nominal diameter inches, millimeters proof load stress 0. Bolt torque calculator determining proper torque to bolt. These torque calculations are estimates and are only offered as a guide. The torque values in table v have been calculated as noted in the footnotes, by using formulas from reference 3. In preparing this guide to torque values, the following basic assumptions have been made. Torque coefficienttorque coefficient between bolt and receptacle. K factor is a torque coefficient between bolt and receptacle. Clampload is only a estimated number, there maybe situations where the engineer calls for the bolts to be tensioned to a different value. An bolt torque for oil free cadmium plated steel nuts and bolts inch. The big problem is that the load on the gasket cannot be measured directly and easily during installation.
The following torque values are advisory only, and its show more. Mr only comes into effect if the adjusting nut is pressing on the bearing surface. Because there are many variables that affect the torque tension relationship, the only way to determine the correct torque is through experimentation under actual joint and assembly conditions. We offer the lowest minimums in the industry, and sell by the piece or in bulk you buy only the fasteners you need. Bolt science providing solutions to bolting problems. Bolt torque values graphitexf sheet ring gaskets raised face flanges.
T torque, foot pounds k nut factor torque coefficient resulting from estimated coefficient of friction d nominal diameter of the bolt, inches f tension, pounds improved torque tension. Nut factors are generalized averages that may vary greatly given all of the variables in any bolted joint, but are useful in approximating theoretical torque values. By using this torque calculator, you agree to the following terms and conditions. Technical data suggested tightening torque1 values to produce corresponding bolt clamping loads notes. Shank bolts torque wrench capable of 75 ftlbs of torque.
Ez calc bolting calculator, enerteqs oline tool for estimating required torque values. If a screw is lubricated, the friction in the threads and under the head is decreased and the relation between tightening torque and clamping force is changed. These estimated torque values are derived from the standard torque formula torque kdf utilizing a standard freespinning nut nonlocknut with a proof strength equal to or greater than the tensile strength of the bolt. A bolt torque chart will give the estimated torque calculations. It is a function of the materials it is a function of the materials frictional characteristics, which are based on surface finish, coatings and so on. The f, or force, portion from our torque equation is composed of two major. Truthfully, product information rarely supplies torque values. How do i determine bolt torque for flanged connections. Calculation of the frictional torque adjusting nut bearing surface m r. Tightening torque tightening torque tightening torque tightening torque bolt clamping force lbs. Estimation of bolt size and property class, disc spring calculator, cost savings calculator, thread engagement length calculator, torque and preload with nut factor imperial system, torque and preload with nut factor and tool accuracy imperial system, torque and preload with nut factor and tool accuracy metric.
If youre looking for the next big thing, futek has a library of over 100 new and innovative ideas to incorporate its load cells, torque sensors, pressure sensors, and multiaxis sensors. The bolt is stressed up to the proofload value, and if there is no deformation, elongation, or fracture, then the bolt is deemed to have passed. A55 fastener torque charts imperial has made a concerted effort to provide accurate information in its catalog and on its web site, however imperial assumes no responsibility for the accuracy of the information. They are of two types, metric flange bolts and metric hex bolts. Axial loads, shear loads, thermal loads, and thread tear out are.
The amount of force on a fastener is called as torque. For bolting specifications that do not have a published proofload, it is usually calculated at 92% of minimum yield strength. The proof load itself is usually 85% to 95% of a bolt s yield strength, but the clamp load is significant because it is what ultimately provides the clamping pressure. Installation torque tables for noncritical applications. For me, it all started with writing my diary for a student. Bolt tightening torque calculation free download as excel spreadsheet. Bolt torque values elastomers ring gaskets raised face flanges elastomeric ring gaskets on asme b16. There a number of websites that will give bolt torque chart pdf and metric bolt torque chart pdf and these are free to download. Nonstock items may vary due to variables in methods of manufacture.
Tightening torque tightening torque tightening torque tightening torque the torque values can only be achieved if nut or tapped hole has a proof load greater than or equal to the bolt s minimum ultimate tensile strength. Bolt tightening 2 bolt tightening 21 various tightening methods various tightening methods 34 22 screw and torque relation formula between screw and torque 35 23 torque coefficient 1 formula of torque coefficient 36 2 the torque coefficient is not stable 36 3 even when the torque is stable, axial tension may vary 36. T the purpose of tightening screws is to fix one object to another object. If you exceed the proofload value when tensioning the bolt, you run the risk of bolt failure.
Apply suitable axial tension it is best to do axial tension control for tightening screw, but actually it is difficult to measure. Determining rock bolt or anchor tension using a torque. Scribd is the worlds largest social reading and publishing site. Bolt torque can be checked with a tool such as a torque wrench, but without a value as a guideline, a torque wrench offers no advantage. Tightening torque values are calculated from the formula t kdp, where t tightening torque, lbin k. Bolt torque, axial clamp force, bolt diameter calculator. Bolts that are fully or partially threaded, with washers and nuts are called as metric bolts. Recommended bolt torque table size recommended torque grade 2 grade 5 grade 8 188 ss bronze brass coarse fine coarse fine coarse fine coarse fine coarse fine coarse fine.
The tensile load a fastener can withstand is determined by the formula p st x as. Metric bolts tightening torques engineering toolbox. Sway bracket assembly recommended tools for installing the hitch ball. Hytorc proprietary bolting software and flange bolt torque calculator, flange calculator, flange management software. The relation between applied torque and axial force or load in a bolt can be calculated as. Bolt tightening table table 14 table 15 figure 21 1. Astm a193 b7 grade bolts are made of alloy steel, aisi 41404142 quenched and tempered and are intended for use in pressure vessels, valves, flanges, and fittings. This online metric bolt torque calculator is used to find the torque of the ecoguard, lubricated and dry metric bolts. The following torque values are suggested maximums based upon actual lab testing on clean and dry or near dry fasteners. The below online astm a193 b7 bolt torque chart provides tension, torque, tpi information against their corresponding sizes.
Torque values stainless steel bolt table chart engineers. Performance data listed are for standard production items only. Online converters and calculators for fasteners bossard. Look up the optimal torque for various combinations of bolt diameter, thread type, and grade or class. As per indian standard, calculation use to calculate tightening torque for all classed bolt. It is a function of the materials frictional characteristics, which are based on surface finish, coatings and so on. See torque force design equations webpage and torque chart page for recommended fastener torque and equation data this fastener bolt torque calculator will estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions.
This standard bolt torque calculator is used to find the maximum torque for the given fractional bolt with the diameter, thread series and standard of the bolt. We have a torque wrench to measure the torque during assembly and a formula to calculate the torque based on the gasket load, but what is the gasket load needed to generate a seal. Tightening and loosening torque of the adjusting nut. Metric bolts head and wrench sizes ansiso, din and. The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. Do not use these values if a different torque value or tightening procedure is given for specific application. The electronic pdf version of this document, available free of charge. Torque is measured in units of newton metres, and its symbol is the concept of torque, also called moment or couple, originated with the work of archimedes on levers. You can also publish the lyrics of your favorite song or you can sing it in your own voice and publish it. Bolt tightening torque calculation personal weapons unrest.
Clamp loads estimated as 75% of proof load for specified bolts. Shear bolts are designed to fail under predetermined loads. The rotational analogues of force, mass and acceleration are torque. Ansi hardware design guide design torque and force calculations. Improvised torque wrench improvised torque wrench with luggage scale. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque. Alternatively,use the torque tension calculator on the norbar website which enables fastener and friction conditions to be modified. Metric bolt torque chart lists the typical maximum recommendations for. Pdf bolt torque tightening procedures mohammed mujahed. Recommended bolt torque values for stainless steel and nonferrous fasteners inch series.