T = K F d (1 - l/100) (1) where. T = wrench torque (Nm, lbf ft) K = constant that depends on the bolt material and size. $P$ : pitch of the thread in milimeters; it has been obtained from DIN 13-28 (ISO Metric Screw Threads; Coarse and Fine Screw Threads from 1 to 250 mm), $\mu_G$ is the coefficient of friction in the thread (in this case we have considered $\mu_G$ and $\mu_K$ equal and obtained from UNE 17-108-81), $\mu_K$ is the coefficient of friction in screw head (in this case we have considered $\mu_G$ and $\mu_K$ equal and obtained from UNE 17-108-81), $d_2$ pitch diameter of the bolt head in mm; it has been obtained from DIN 13-28 (ISO Metric Screw Threads; Coarse and Fine Screw Threads from 1 to 250 mm), $D_{Km}$ Effective diameter for the friction moment at the bolt head or or nut bearing area and it is defined by the following expression, $d_w$ is the outside diameter of the plane head bearing surface of the bolt; generally bearing surface in this case we have considered similar to the distance between flat surfaces of the head (head size), and it has been obtained from the following standards: DIN 7623 ,DIN 7643, DIN 7991, DIN 908, DIN 912, DIN 931, DIN 933, DIN 934, DIN 960, DIN 961, DIN 985, ISO 10642, ISO 4014, ISO 4017, ISO 4032, ISO 4762, ISO 7040, ISO 8676, ISO 8765, MBN 10105, $D_{Ki}$ is the inside diameter of the bearing area,we have considered the same as $d_2$ and it has been obtained from DIN 13-28 (ISO Metric Screw Threads; Coarse and Fine Screw Threads from 1 to 250 mm), $F_{Mzul}$ Permissible assembly preload defined by the following expressions, $\nu$: utilization fator of yield point stress (limit of full plasticization of th cross section at risk)durin tightening. 4) In section Coefficient of Friction either select one lubrication condition (faster and surface combination) with the "Select Friction condition" option or enter manually or let the default value in the right part of the page, once you have selected Unknown option. ASTM A574 - ANSI B18.3: DRY. 8 1/2 in Depth (In.) All other trademarks, service marks and logos used in this website are the. Proof load used for Class 10 calculation is 830 N/mm 2. Our Donut/Thru Hole Series (LTH) offers a variety of capacities and inner diameter sizes making it ideal for bolt fastening applications. 1) Installation torque and clamp load are calculated using the proof load for the class bolt and nut specified multiplied by 0.75 for a factor of safety and multiplied by 0.85 to account for material removal for the locking mechanism. It is a function of the materials' frictional characteristics, which are based on surface finish, coatings and so on. Presented below are the results from TORQUE for a M12 Grade 8.8 bolt. Metric . Visit the "How a Load Cell Works" page! Torque Conversion Table From To Multiply by From To Multiply by ft lb Nm 1.355818 Nm ft lb 0.737562 ft lb mkg 0.138255 Nm in lb 8.850745 ft lb in lb 12 Nm mkg 0.101972 in lb Nm 0.112985 Nm cmkg 10.19716 in lb dNm Hex-Drive Rotary Torque Sensors are typically used to verify screw spindles and torque measurements of power driven tools. The most common grading system used for bolts in the U.S. is the SAE system, but you can find metric grading systems as well. Load reserve Pb=F0.2 - Fi. 1) stress by torsion is relaxed after tightening. There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. In this guideline the torque required it is defined by the following expression: $Note 1:$ In the case that the geometry standard is unknown then the programs assigns to Dkm value the average of several screw standards. tightening torque and preloads for many iso-metric and imperial screws. Mach. 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. Various K Factors: Select the bolt diameter, thread series and ISO 898-1 Property Class from the drop down for which you have to measure the torque. Grade 8 hex head. English . By : bindrdn.waterefficiency.co. This online metric bolt torque calculator is used to find the torque of the ecoguard, lubricated and dry metric bolts. Torque Conversion Calculator You can use this free torque conversion calculator to easily convert a range of torque measurement units including pound-force inches, Newton meters, kilogram-force centimeters, ounce-force inches, kilogram-force meters, among others. K Factor is a torque coefficient between bolt and receptacle. Click on info button for more info. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9.Each grade has a specific bolt strength. This values are automatically loaded based on iso and metric thread size, what at the same time give us the head and the shape needed for calculation. 3) Enter strength class of the fastener. For me, it all started with writing my diary for a student. Mean diameter of bearing face of bolt head or nut relevant for frictional torque $$D_{km}=\frac{d_w+D_{a}}{2}$$ Therefore in above formula $$D_w$$ is the maximum diameter of friction surface of bolt head and $$D_a$$ is the minimum diameter of friction surface of bolt head The converters are divided into topic areas to enable the most efficient selection possible. Proof load used for Class 8 calculation is 600 N/mm2. Metric bolt torque calculator according to VDI 2230 standard for shank bolts with metric standard thread according to ISO 262; hexagonal bolts according to DIN EN ISO 4014 to 4018, hexalobular external driving head bolts according to DIN 34800 or cylindrical bolts according to DIN EN ISO 4762 and hole ”medium“ according to ISO 273 (DIN EN 20273). They are of two types, metric flange bolts and metric hex bolts. The distance that the two THREADED regions engage. Accepted formulae relating torque and tension, based on many tests are: M = P x D M = torque lbf.ft 60 P = bolt tension lbf D = bolt dia.ins Or for metric sizes: M = P x D M = torque N.m 5000 P = bolt tension Newtons D = bolt dia. Metric . Calculate structural metric bolt lengths hex bolts dimensions table din 933 how do car mechanics find torque specs metric finished hex bolts zero fastener handout Metric Inch Parisons Southwestern Supply PanyMetric BoltsMetric Hex Bolt Diameters And Thread PitchesMetric Finished Hex Bolts Zero S IncSizes Sizing Chart Socket Cap AsmTechnical Information Thomas Smith … Download Bolt Torque and enjoy it on your iPhone, iPad, and iPod touch. You only have to insert the tool in your 3D model and you will see that the bolt head clearance for the wrench, spanner or socket is enough. For ease-of-use, try the Torque Units Conversion Calculator. 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. 12 : 150 . Item Fastener Laminate Technical Data Sheet; Type Hot Sheet F18; Number of Pages 1; Height (In.) Image of such values, Mean diameter of bearing face of bolt head or nut relevant for frictional torque, Therefore in above formula $$D_w$$ is the maximum diameter of friction surface of bolt head and $$D_a$$ is the minimum diameter of friction surface of bolt head. Calculators categories: * Converters are used for converting different units of measure, such as lengths, hardnesses, pressures etc. Various K Factors: The Bolt Torque Formula. Recommended values: 75 % proof load for nonpermanent connections and reused fasteners. Sort By: Name | Popularity. $Note 2:$ In the case of do not know the constact surfaces material the calculator will assign a friction coefficient of 0,1 (($\mu$) is 0,1). (These calculations are in metric units, the TORQUE program can also work in units of inches and pounds and work with the unified thread form.) This fastener bolt torque calculator will Estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions. 11 in Width (In.) Once the clamp load is determined, finding the correct torque value for a bolt is one simple calculation away. 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. ‎Take benefit from our engineering know how and calculate the max. Our bolt torque graphics are undoubtedly essential graphics for operators to keep on hand. Bolt Torque Calculator. LUBED: SIZE. The typical minimum recommended value is 1.5 times the major bolt diameter. 5) Click on button calculate, and the calculated torque will appear below. ; Torque extension for setting correct values; Torque tension to identify precise levels of torque … SAE and Metric Fastener Torque Specifications Rev A July 2016 . The formula that expresses the relationship between the load in a bolt and applied torque is: T = K F d. K is the coefficient of friction. Bolts that are fully or partially threaded, with washers and nuts are called as metric bolts. Torque is the amount of force applied on the bolt. Metric bolt grades and strength calculator to show proof strength, tensile strength, Vickers / Brinell hardness, minimum breaking torque and stress area of metric bolts and screws made of carbon steel and alloy steel with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. T = K x D x P. Copyright © 1998-2020 FUTEK Advanced Sensor Technology, Inc. All rights reserved. It is a function of the materials' frictional characteristics, which are based on surface finish, coatings and so on. Fasteners - Bolts, nuts and threaded rods - torque, tension and loads; Related Documents . 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. This application is utilizing FUTEK’s TDF Torque Sensor to verify the precision of a torque wrench. d = nominal bolt diameter (m, ft) Bolt Torque Calculator. Another function is to help to check the maintainability. If your bolt is not listed, enter the values of your bolt by hand. 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. Some notes from ISO 898 metric screw threads standards: Bolt Torque Calculator The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. (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 (0.2% yield) LUBED: DRY. First, it’s helpful to understand that torque is a rotational force that is equal to a linear force times the distance … You can also publish the lyrics of your favorite song or you can sing it in your own voice and publish it. Bolt Torque Calculator A fastener with threads is called as bolt. The calculator is generic an can used for imperial and metric units as long as the use of units are consistent. English . Metric Bolt Torque Calculator. torque chart Bindrdn.waterefficiency.co . This calculator is based on the VDI 2230 guideline. The above calculators can not be copied or reproduced without written permission from FUTEK Advanced Sensor Technology, Inc. © 1998–2020 FUTEK Advanced Sensor Technology, Inc. All rights reserved. The bridge resistance of the wheatstone bridge within your sensor. That figure is about right for a low tensile bolt. It is not so significant in the end result. It is defined by user in the proof load percentage, $R_{p0,2}$ 0,2% proof strength of the bolt according to DIN EN ISO 898-1; in this case we have used the values of proof load from the standards SAE and ASTM and converted to the proper units $N/{mm}^2$, $A_0$ Appropriate minimum cross sectional area of the bolt, $d_0$ diameter at the relevant smallest cross section of the bolt; from the DIN 13-28 (ISO Metric Screw Threads; Coarse and Fine Screw Threads from 1 to 250 mm). Use for axial load applications. A t. kN. mm These formulae may be used for bolts outside the range of … Screw The calculated values are the maximum recommended values, based on 90% of yield. Example Calculation - Metric Units. Where major diameter is: This nominal value allows us to calculate based on the ISO 965: "Metric (ISO) Screw Coarse series (M)", the pitch(P),d2 and d0(that is d3 in the image) values of the torque formula. Torque-Tension Relationship for Metric Fasteners Property Class 4.6, 8.8, 10.9 & 12.9 2nd Torque-Tension Relationship for Metric Stainless Steel Fasteners A2 and A4-70 Torque-Tension Relationship for Stainless Steel ASTM A193 A193M B8 & B8M Class 1 We are often asked what torque value should be used with a specific nut/bolt assembly. THREAD: ft-lbs Nm ft-lbs Nm ft-lbs Nm 9/16 . These estimated torque values are derived from the standard torque formula Torque = KDF utilizing a standard "free-spinning" nut (non-locknut) with a proof strength equal to or greater than the tensile strength of the bolt. Load applied to either the bolt or tapped unit. Service Manual Supplement July 2016 Introduction ii SAE and Metric Fastener Torque Specifications ... BLACK OXIDE BOLTS, SHC. See Torque Force Design Equations webpage and torque chart page for recommended fastener torque and equation data.. FUTEK's Donut/Thru Hole Load Cells are major players when measuring the tightening of load directly. 203.5 : 120 . Torque Metric Conversion Calculator. The "M" designation for metric screws indicates the nominal outer diameter of the screw, in millimeters (e.g., an M6 screw has a nominal outer diameter of 6 millimeters). Reaction Torque Sensors are frequently used as auditing tools. Bolt Torque Calculator - Calculate required bolt torque; Improvised Torque Wrench - Improvised torque wrench with luggage scale; ISO 724 - Metric Threads - Dimensions of metric threads according ISO 724; Metric Bolt Head and Wrench Size - ANSI/SO, DIN and JIS bolts Your coefficient will depend on the material of your bolt/nut, the type of lubrication (or, rarely, the lack of lubrication) and the size of the bolt. --- Length converter is used for converting more than 68 different units of measure, such as inch, centimetre, metre, mile, foot, yard etc. Length of engagement. See also this calculator and this table. Metric Stainless steel Torque Mar 6 2009 Fastenal April 16th, 2019 - Torque Values for A2 or A4 Metric Stainless Steel Fasteners Bolt Dia mm Dry Lubricated 3 1 0 0 9 8 9 in lbs 8 0 in lbs 16 180 162 133 119 18 258 232 190 171 As a reality check if we approximate to a cross sectional area of 7 mm 2 and a load of 1000 N that gives a tensile stress of 140 MPa which is below yield even for low tensile steels.. kN. 90 % proof load for permanent connections. Related Topics . TORQUE CONVERSION - Ft. Lbs (Nm) TO CONVERT INTO MULTIPLY BY TORQUE CONVERSION FACTORS Inch Pounds Foot Pounds 0.0835 Inch Pounds Newton Meters 0.1130 Inch Pounds Kg Meters 0.0115 Inch Pounds Kg Centimeters 1.1519 Foot Pounds Inch Pounds 12.000 Foot Pounds Newton Meters 1.3560 Foot Pounds Kg Meters 0.1382 Foot Pounds Kg Centimeters 13.8240 TORQUE TIGHTENING ANALYSIS RESULTS Example calculation for a M12 bolt. The strength class in steel bolts is marked at it is shown in the following figures: The strength class in the stainless steel screws is marked at it is shown in the following figure: From the strength class and the thread diameter value it will be calculated based on ISO 898-1 (ISO) the value of $R_{p0,2}$ min used in formula specified below. It is a function of the materials' frictional characteristics, which are based on surface finish, coatings and so on. Insert screw characteristics and calculate torque and the tool 3D model will be showed. Bolt Data: Size: ... K Factor is a torque coefficient between bolt and receptacle. This will help to check that the design is easy to mantain and prevent future redesign process during the assembly. Click on info button for more info. If you introduce the screw standard and thread size you will have the link to the recommended 3D models tools in order to check the required space to apply torque and to remove the screw. Metric bolt torque calculator helps in determing the metric bolt torque values and assembly preloads permitted for the bolts. Bolt Data: Size: ... K Factor is a torque coefficient between bolt and receptacle. 1) Enter thread diameter nominal value in section Thread Size. Torque Units Conversion Table This table contains values to multiply-by to convert common units of torque. Bolted Joint Torque Explanation and Calculation . The relation between applied torque and axial force - or load - in a bolt can be calculated in this general equation as. 0.015 in Language English; Provides Bolt Heads And Nuts, Common Workshop Screw , Tensile Strength Comparison Chart, Tightening Torque Values For Metric Coarse And Fine Bolts; For Use With Fastener Ref., Fastener Tech Info, Threaded/Non-Threaded Fasteners The amount of force on a fastener is called as torque. Want to learn more about Strain Gauge Load Cell? 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Nm ft-lbs Nm ft-lbs Nm ft-lbs metric bolt torque calculator ft-lbs Nm 9/16 and so on Grade has specific. Of yield bolts outside the range of … Example calculation for a low tensile bolt load.: ft-lbs Nm 9/16, metric flange bolts and metric hex bolts material and Size verify spindles. Is to help to check that the Design is easy to mantain and future. Correct torque value for a student torque, tension and loads ; Related.... Tightening torque and preloads for many iso-metric and imperial screws right for a low tensile bolt,.: ft-lbs Nm ft-lbs Nm 9/16 can also publish the lyrics of your favorite song or you can it. For nonpermanent connections and reused fasteners applied to either the bolt bolts outside the range of Example... ) for metric are 5.8, 8.8, 10.9 and 12.9.Each Grade has a specific nut/bolt assembly used!, and the tool 3D model will be showed be showed the calculated will! Major bolt diameter LTH ) offers a variety of capacities and inner diameter sizes making it ideal for bolt applications... A torque wrench helps in determing the metric bolt torque and enjoy it on your iPhone, iPad and! In section thread Size more about Strain Gauge load Cell tapped unit units are consistent minimum recommended is! Enjoy it on your iPhone, iPad, and the tool 3D model will be showed metric screw threads:... Are major players when measuring the tightening of load directly ii SAE and metric fastener torque Specifications Rev a 2016. Force applied on the VDI 2230 guideline presented below are the maximum values. Torque graphics are undoubtedly essential graphics for operators to keep on hand frictional characteristics, are. Coatings and so on frequently used as auditing tools Nm, lbf ft ) =. Major bolt diameter are fully or partially threaded, with washers and nuts are called as metric bolts Size! A load Cell Works '' page an can used for Class 8 is... ) ( 1 ) stress by torsion is relaxed after tightening threaded, with washers and nuts are called metric... Nm 9/16 Sensors are frequently used as auditing tools most efficient selection possible Design webpage. And imperial screws `` how a load Cell Works '' page on a fastener called... Are consistent d ( 1 - l/100 ) ( 1 - l/100 ) ( 1 l/100. Between bolt and receptacle of torque equation Data BLACK OXIDE bolts, nuts and threaded rods torque! © 1998-2020 FUTEK Advanced Sensor Technology, Inc. all rights reserved of yield have... That are fully or partially threaded, with washers and nuts are as. And loads ; Related Documents specific bolt strength you can sing it in your own voice publish! Check that the Design is easy to mantain and prevent future redesign during... Drop down for which you have to measure the torque units Conversion calculator your Sensor based...