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. Record subject calculation sheet computed checked ref fisheries seychelles ca pp calculation m20 bolts torque. There can be as many as 200 or more factors that affect the tension created in a bolt when tightening torque is applied refer to paragraph 2. Ez calc bolting calculator, enerteqs oline tool for estimating required torque values. See torque force design equations webpage and torque chart page for recommended fastener torque and equation data. Downloads hydraulic, torque, wrenches, pneumatic, torque. Download free printable bolt torque chart samples in pdf, word and excel formats. The big problem is that the load on the gasket cannot be measured directly and easily during installation.
Norbar has devised easytouse online calculators that support the correct application of torque in three key areas. With our products, bolting is fast, safe, easy and accurate. Bolt torque calculator chart templates are available on this website and can be downloaded for free. The download for our demo program is packaged in a self extracting exe file that includes an uninstall facility ifwhen you want to. Information regarding socket head bolt torque chart and metric socket head bolt torque chart can easily be. Your target assembly bolt stress should not exceed 70% of that value, or 385mpa. We offer the lowest minimums in the industry, and sell by the piece or in bulk you buy only the fasteners you need. If lubrication is to be applied to the nut bolt,multiply the recommended torque by the appropriate factor shown in the table on page 7.
The download for our demo program is packaged in a self extracting exe file that includes an uninstall facility ifwhen you want to cleanly remove the program and associated files from your system. Running torque should be included in the values listed in the tables because any torque puts shear load on the bolt. 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. This chart is easily accessible and can be incorporated into any of your personal uses. Torque curve for 45,000 psi bolt stress torque required. 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. Metric bolts tightening torques engineering toolbox. Informate bolt load calculation software us english pdf document, 929. Alternatively,use the torque tension calculator on the norbar website which enables fastener and friction conditions to be modified. Tg bolt isolation grommet submittal data the kinetics noise control model tg bolt isolation grommet is used primarily to fill the excess clearance in the anchor bolt holes in equipmentisolator mounting platesfeet. Ln the same period, the research council on structural connections has developed two new specifications for structural joints using astm a325 or a490 bolts, one based on allowable stress principles and the other on a load factor and resistance design philosophy. Torque torque tightening analysis program, torqueds. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque.
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. 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. Clamp loads estimated as 75% of proof load for specified bolts. It equals the contact force between the clamped plates. To arrive at the correct torque value, several other values must be found first. Mdesign bolt offers engineers in mechanical and plant engineering the possibility of calculating bolt connections which are subject to high stress in accordance with vdi guideline 2230 systematically and in accordance with the standards.
By combining the torque angle curves with a few simple calculations and a basic understanding of the. Bolt sciences torque program example calculation inchlb units. Online converters and calculators for fasteners bossard. Bolt tightening torque calculation wl1pm8zxy9lj idocpub. They are of two types, metric flange bolts and metric hex bolts. See the instructions within the documentation for more details on performing this analysis. In preparing this guide to torque values, the following basic assumptions have been made. 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. Torque tightening analysis results analysis of a 12 inch unf bolt fastener thread. As well as new training videos and a hytorc locator. In this calculator, when torque is chosen, the calculator will then measure an engines approximate torque, based on the engines horsepower, multiplied by 5,252 this is required for the conversion of footpounds into horsepower and this is then divided by the rpm of the engine. These torque calculations are estimates and are only offered as a guide.
Metric bolt torque chart lists the typical maximum recommendations for tightening torques for metric bolts. Tension calculation visual aid shear calculation visual aid torsion calculation visual aid bolt torque vs clamping load visual aid bolt torque vs clamp load note. The codes and best practice require that the diameter of an anchor bolt hole not exceed the diameter of the anchor bolt by more. The following torque values are advisory only, and its show more. Bolt torque calculator free download as excel spreadsheet. Look up the optimal torque for various combinations of bolt diameter, thread type, and grade or class. Bolt circle calculator lbolt yamaha bolt bolt taxify app hooked bolt nut and bolt specification bolt action bolt action rulebook bolt torque for tema yamaha star bolt flywheel bolt torque yamaha bolt 2016 3rd edition lightning bolt misaligned bolt holes 2014 yamaha bolt split bolt splice 4th edition lightning bolt ford f 150 caliper bolt. 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. Torque tension to identify precise levels of torque to be applied for individual applications.
Bolt science providing solutions to bolting problems. Inputting four calculation variables allows the app to determine. The calculator is generic an can used for imperial and metric units as long as the use of units are consistent. 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. The relation between applied torque and axial force or load in a bolt can be calculated as.
Practice guidance torque tighteningbestpracticeguidanceonlinetrainingbrochure. 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. Bolt sciences torque program example calculation inch. The torque values in table v have been calculated as noted in the footnotes, by using formulas from reference 3. Fortunately, torque angle signature curves can be obtained for most bolted joints. Hytorc bolting software flange bolt torque calculator. Bolt torque chart template free download formsbirds. For stainless steel bolts that are at risk of galling, i would experimentally determine my nut factor, based on the lubricant andor coating that you will actually use.
Google play store itunes store the official hytorc app gives you instant access to torque charts, safety and operational videos, product manuals, service center locations and our comprehensive bolt load calculator. If you exceed the proofload value when tensioning the bolt, you run the risk of bolt failure. Truthfully, product information rarely supplies torque values. It is a function of the materials frictional characteristics, which are based on surface finish, coatings and so on.
The tightening torque equals the total torque applied minus the prevailing torque. Iso 724 metric threads dimensions of metric threads according iso 724. Forces on a bolted connection bolt torque torque is the turning force measured in footpounds ftlb or inchpounds inlb applied to tighten turn the nut on a bolt. Bolt load calculation software hydratight introduces informate. Make liter cid engine model year rod torque main torque cylinder head bolt torque acura 1. Informate bolt load calculation software uk english pdf document, 916. How much torque is required for proper tensioning of a bolt in a given situation. View, download or print this bolt torque chart pdf completely free. Unit conversion to assist international measurement definitions. Applying torque to a nut is an indirect method of obtaining that bolt stress. Pdf bolt torque tightening procedures mohammed mujahed. Scribble it on a virtual napkin, fold it up and drop it right.
Standard maintenance practice dictates that mechanics add this value to the specified torque. They can be threaded onto a new or existing bolt, stud, threaded rod or shaft. Torque calculator helps in determining the torque that arises in a rotating object. Clampload is only a estimated number, there maybe situations where the engineer calls for the bolts to be tensioned to a different value. K factor is a torque coefficient between bolt and receptacle. 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. Torque window, displays torque and defines coefficient of friction load graph window, displays bolt stress over a 3 stage time period bts takes the complexity out of bolt tightening calculation.
Bolt torque calculator calculate required bolt torque. Most accurate bolt torque calculator given its geometry and thread diameter, using vdi 2230 standard, screw clearance through the specific tool 3d model. Metric bolts head and wrench sizes ansiso, din and. Table 1m is based on a target assembly bolt stress of 345mpa. This online metric bolt torque calculator is used to find the torque of the ecoguard, lubricated and dry metric bolts. See the reference section for details on the methodology and the equations used. Bolt target torque asme pcc1 boiler and pressure vessel. 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. Bolts that are fully or partially threaded, with washers and nuts are called as metric bolts. A prevailing torque is required just to rotate the nut on the bolt. Here, the library includes a wide variety of tools for bolt calculation depending on the use case. T he torque clampload relationship varies with lubrication used on the bolt lubrication type can be input at the top of the page. By using this torque calculator, you agree to the following terms and conditions. Bolt stress window, displays bolt stress, bolt load and % of bolt yield.
The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. Fasteners bolts, nuts and threaded rods torque, tension and loads. This is done to allow a safety buffer so that the bolt does not get too close to the proofload value. Resources to help you determine the right solution for your application. Standard tightening torque for metric screw threads. Common bolt torque values can be looked up, but finding an accurate reference isnt always easy.
Informates bolt load values are independently verified to ensure leakfree joints, every time. Bolt torque, axial clamp force, bolt diameter calculator. Bolt torque chart 5 free templates in pdf, word, excel download. Bolt sciences torque program example calculation inchlb. Improvised torque wrench improvised torque wrench with luggage scale.
Fill, sign and download bolt torque chart online on. These produce a 90% utilization of the bolt yield strength. Ansys apdl bolt torque tutorial free download as powerpoint presentation. Calculation of bolts according to vdi 2230 mdesign bolt. Magtrol will often list units using the short form such as pound foot lbft which can also be written as poundforce foot lbfft. I would not adjust the resultant torque values from table 1m at all, unless you calculated that you needed more than 345mpa assembly bolt stress. You can print them and keep them for future reference. 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 bolts minimum ultimate tensile strength. Engineering fundamentals of threaded fastener design and analysis. Use to determine torque, bolt load and percent yield of maximum load of bolts. The bolted joint analysis calculator allows for stress analysis of a bolted joint, accounting for preload, applied axial load, and applied shear load.
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