Bolt Tightening Torque Calculation Pdf
15 for plated fasteners. Besides the torque required to stretch the bolt, torque is also required to overcome friction in the threads and under the nut face. A wide range of pipe clamps are available for various applications. · Do not let the seat of a bolt or nut dent the contact area. About Portland Bolt Portland Bolt provides anchor bolts and nonstandard construction fasteners directly to contractors, steel fabricators, OEMs, and other construction-related companies worldwide. Locate the torque setting on your component. An invaluable tool for engineers, the torque. com 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. The nominal torque necessary to tighten the nut bolt 5 to a given preload can be determined either from tables, or, by calculation using a relationship between torque and the resulting bolt tension. When designing machinery that uses lead screws, it's a common task to try and figure out the size of motor needed to drive a given force with a lead screw. If the preload is achieved by torquing the bolt to initial torque-yield, the maximum and minimum preloads must be determined from an application specific test. The calculations now consider special conditions of relative strength, bending loads and torsion loads of single bolt connections. RECOMMENDED ASSEMBLY TORQUES Class 10. The nut has to be strong enough to be able to impart the necessary torque to the bolt and also withstand. 9) Use an accurate torque wrench to tighten standard type head bolts in 3 to 5 incremental steps following the recommended sequence and torque specs for the application. After that this one bolt connection can be calculated according to the definition in part 1. Say you have a 8 inch wrench and figure you are applying 4 pounds of force on the wrench centered at 6 inches from the center of the nut. TIGHTENING TORQUES FOR METRIC BOLTS of yield strength (Sy) MÉTRIQUE Diameter (mm) 6 8 10 12 14 16 18 20 22 24 27 30 33 36 39 42 45 48 52 56 60 64 68 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 M42 M45 M48 M52 M56 M60 M64 M68. PDF | Torque control is usually the only method for tightening bolts in some precision assembly applications. Bolt torque Torque is the turning force measured in Newton metre (Nm) applied to tighten (turn) the nut on a bolt. The total torque value applied to a fastener (preferably the nut in a nut/bolt combination). Carbon steel is the cheapest and most common bolt material. Mark each head bolt and head with aligning marks. This bolt must be replaced before power can be restored. The importance of correct bolt tightening cannot be over emphasized. Tightening torque 5. 2) the torsional stress may vanish by relaxation. These bolts are said to be in "double shear" and can transfer twice as much force as a bolt in single shear. *Use these values if you do not lubricate the bolt. The calculations are based on a friction coefficient of 0. Tightening torques are only recommended for proper applications. This material is used in outdoor construction, and today, is the standard throughout the. > auto <10-15 ft-lbs. ) required min. Bolt Torque Calculator - Calculate required bolt torque; Improvised Torque Wrench - Improvised torque wrench with luggage scale; Lubricated Bolts and Reduced Torque - Lubrication effect on bolt tension and torque; Metric Bolts - Tightening Torques - Typical maximum recommended thightening torques for metric bolts. Small differences may however. 14 (new bolt) without any after treatment, non-lubricated). Practical advice Tightening torque Product Stripping PZ n° (mm) (mm) single cable multi cables (mm) mini maxi mini maxi Connection DB90 - 6 - 3. Using a "QUALITY" torque wrench (1/4" drive is best) Torque the valve cover bolts to 84 inch lbs (or 7 ft. be 1-1/2 times the bolt diameter. Tightening Torque (in FT-LB) UNRC 17 35 62 100 150 283 500 688 1040 UNRF 19 38 70 109 172 317 562 767 1080 Listed tightening torques are 75 percent of the torque to yield based on ASTM 574. Using the original mounting bolts, install the starter motor. Then, fit it over the socket, nut, or bolt and turn it clockwise to tighten it. Describe specifications requirements for cleaning and painting of bolts. - 6000 Structural Bolting. We call this force to fix axial tension. All PEM metal prevailing torque type locknuts achieve their prevailing torque by altering the shape of the nut in some way - most commonly by distorting the threads of the nut, which then grips the mating part during tightening. (4) Tighten in two steps: Install new torque-to-yield bolts, and tighten in sequence to 27-32 N-m 20-23; Lb-Ft). bolt selection calculation pdf. In a bolted ﬂange, the applied torque generates the axial load in the bolt. F1554 does not specify tightening torques. Using the stem example above, it may only require 5Nm of torque on the clamp bolts to secure a handlebar in the. Any equipment used to tighten high tensile bolt connections (e. ) Tightening Torque Clamp Load (lbs. Used for attaching a rope or chain. Generally the full effort of an ironworker with a ordinary spud wrench is sufficient to tighten the nuts on anchor bolts. The first factor is the bolt's diameter. In bolted joints, clamping force is usually generated by applying torque to bolt head or nut. frb 20/10/97 00 - General Instructions Type Screw Dimensio n Unit 00 00 Extract from company standard BMW N 600 02. Bolt Torque Specs in Foot Pounds or (Inch Pounds) Size/Thread Grade 5 Grade 8 Grade ASTM-A574 Class Tensile Torque Reference Chart Metric (ISO 898) - Inch (SAE J429) Note: These charts are provided as a Reference only. Small differences may however. Standardization of Clamping Height. Tighten all bolts by an. During the bolt tightening process, the length of the bolt increases and it behaves like an extension spring. Calculation of Axial Tightening Force and Tightening Torque. bolting torque table 1a - cold service astm a193 and astm a320 grade b8, cl2 stud bolts. Norbar's torque wrench extension calculator is now available as an app to download free on iPhone and Android. Say you have a 8 inch wrench and figure you are applying 4 pounds of force on the wrench centered at 6 inches from the center of the nut. Attach the correct hex-bit socket and tighten the faceplate bolts in half-turn increments using the following four-bolt tightening pattern. It is unique to that fastener combination. Improper torque applied to bolt or nut - Torque is probably the most often used method of tightening a bolted joint after the "tighten by feel" method. This bolt must be replaced before power can be restored. A Bolt Torque Chart will give the estimated torque calculations. The K Factor is an experimentally determined constant that relates the torque applied to the load induced in the fastener. by adequate tightening. The results for PPM bolts are not public. However, in usual applications, bolt tension is induced by torque on the nut and the bolt is subject to combined tension and torque, which may cause the. In a bolted ﬂange, the applied torque generates the axial load in the bolt. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point. Tightening of bolts with torque. Tightening to yield simplifies the tightening method ("If the bolt does not break during tightening it will not fracture in subsequent service"). The Torque -Turn tightening method has been the required procedure for tightening structural bolts for many years. See All Products. We have Carter Brothers Brake Bands and 4-3/4" HEAVY DUTY Carter Brothers Brake Drums available on our Band Brakes Page. The behavior and life of the joint depends on how tightly the bolts clamp and how long they can maintain their preload. An explanation of how to use a torque wrench, a tool that allows you to tighten fasteners with a specific amount of torque. The tightening torque used in this application is 80 Nm. Apply as necessary. Zoom Sized for Print (c) Mark the front of the cylinder head bolt head with paint. the torque to loosen to establish the proper tightening torque spec. (see Figure B) Non-Serrated head with lock patch and lock strap installation procedure: Loosely install the NEW bolts, and then tighten them to the torque shown in Chart 4. Several factors affect how much tension occurs when a given amount Of tightening torque is applied. Contact the manufacturer for updated torque specifications. au Torque, by definition, is a force caused by turning. p atad bolts (as received). Generally 70% bolt yield is targeted. RECOMMENDED ASSEMBLY TORQUES Class 10. ), it is not possible to accurately calculate the required tightening torque M t for a precision lock nut or the bolts in an end plate. A k factor of 0. The applied torque causes the bolt to "climb" the thread causing a tensioning of the bolt and an equivalent compression in the components being fastened by the bolt. Tighten each bolt 1/4 turn (90 degrees). Bolt strength class 10. What is torque? How is it measured? What loads and forces are at play within a bolted. This applies to clean and and dry parts. Hydraulic and pneumatic Torque tools. Subscribe to Our Digital Newsletters. Clean thoroughly around the area where the spindle and casting mate. Roof Manholes and Shell Manholes. Always tighten the bolt to the proper torque value, which is stamped on the hoist ring. com The National Annex may exclude certain bolt. pdf Poster on why nuts and bolts can come loose. Download PDF. • In calibrating the torque wrench, three bolts are to be tested and the average torque from the three tested bolts will be the “job inspecting torque” to be used. Online bolt torque calculator ( UTS and VDI 2230) durin tightening. See All Products. ) Tightening Torque Clamp Load (lbs. The 20” and 24” standard roof manholes use 16 and 20, 5/8” bolts respectively. Contact Atlanta Rod Bolt Size TPI Proof Clamp Tightening Torque (ft lbs. Once lowered onto the crossmember, install and tighten the transmission’s rear-mount bolts. Tightening torque 5. Example Calculation - Metric Units. This section of the Spaenaur catalog also includes guides and charts for disc spring load and stress calculations, dynamic loading and fatigue life, typical disc spring characteristics, disc spring tolerances, suggested tightening torque values to produce corresponding bolt clamping loads, bolt load, and stress as a function of torque. boltcouncil. of the drive shaft bolt, or an incorrect initial tightening torque of the drive shaft bolt (main retaining bolt). Joint Separation. 1 Proofload is the published number that full size headed bolts are tested to. Using a wrench, rotate the nut to tighten. Is a tightening procedure specified by the specification? 8. They have a large, flat head. 20 for non plated steel fasteners and K=0. (L) - length of thread engagement is the length of which the female threads contact the male threadsg (D) - bolt nominal diameter (inches, millimeters) Proof Load Stress (0. Bolt Torque Report - Free download as Excel Spreadsheet (. for 1/2" bolt with hex nut as the turning element Note: The following calculations are based on 1/2" dia. Pass 5: Check all bolts at 100% torque with a circular pattern. bolting torque table 1a - cold service astm a193 and astm a320 grade b8, cl2 stud bolts. Whilst I agree lubrication does gives more consistent results, vehicle manufacturers calculate wheel nut torque settings based on dry threads, so if using a lubricant you'd want to keep to the bottom of the recommended range to avoid exceeding the bolt lengthening yield stress point (stretched bolts). If the gap is not. The transmission jack can be removed at this point. * Torque value based on 75% of proof load and finish as recieved steel NOTES: Left hand side of ‘-’ is minimum value PROPERTIES OF GRADE 10. Torque specs. its power and torque. Be sure to tighten the bolts in the specified order, to install the part in the proper location. PDF format Tabulating data from bolt-load calculations is an easy way to speed the design process. After tightening the active bolts into place, the dummy bolt for temperature compensation was set into a bolt hole next to the bolt being tightened so that only a portion of the bolt shank was vis-ible. • A325 bolts require a washer under the element (head or nut) being turned to tighten the bolt (shown under the nut, above right) • A490 bolts require a washer under both the head and nut (AISC& NISD2000) Washers 7 • Grip is the distance frombehind the bolt head to the back of the nut or washer. Bolt torque, the amount of force required to tighten a bolt, is listed according either to the Society for Automotive Engineers (SAE), which uses U. • Measure inductance of each reactor phase by applying 35 volts across each reactor and measuring corresponding current. Need help - Torque setting for Front/Rear Wheel Bolt Post by markycee » Sat Jul 23, 2011 12:38 pm Just changed the wheels on mine, but not sure of any torque settings. A torque is an action that causes objects to rotate. Make deflection after joint assembly but before tightening bolts. Insert the remaining bolts (with insulators if required) and tighten nuts to finger tight. However, only about 10% of the torque applied is transferred into clamping force. Fe Fc Fb Fi. When tightening a fastener with a torque wrench, which is one of the easiest and most common methods, the fastener is considered to be properly tightened once the specified torque is achieved. Attempting to fully tighten hardware with impact guns/torque sticks also prevents using a click-type torque wrench to confirm the specified amount of torque is present. Tighten the bolt to the correct tightening torque. We invite you to view the rest of our web site offering a large range of torque tooling. Tighten plastic insert or crimped steel-type lock nuts approximately 50 percent of the dry torque shown in the chart, applied to the nut, not to the bolt head. The importance of correct bolt tightening cannot be over emphasized. We call this force to fix axial tension. 50 103 371 M20 2. Calculate Tension in bolt when subject to a known torque. When tightening according to guidelines and with no deviation, this is the pre-stress achieved expressed as % of yield point. Possible reason for the torque to be different: Friction is lower than anticipated, possibly leading to a bolt fracture during assembly; Tightening tools are not as accurate as they should be, again leading to a premature bolt fracture either during assembly or in use. Replace the tightening bolts and nuts with new ones if they are aged and remarkably rusted. Calculation of Axial Tightening Force and Tightening Torque. Several factors affect how much tension occurs when a given amount Of tightening torque is applied. An adjacent. How to use reference values - Preload and tightening torques. 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. I then used a gunsmithing screw driver with a t-15 head to tighten it even more, turning about 1/4 turn or so. How to use a torque wrench to tighten bolts. Featuring torque controlled range of 25-100Nm and a 1/2" square drive with pin detent, our programmable 14. ppt), PDF File (. Evidently, the torque spec. Volkswagen Golf Torque Specs. 1 Proofload is the published number that full size headed bolts are tested to. As the bolt is tightened, it is stretched (preloaded). As the bolt is tightened, it is stretched (preloaded). Tighten as required. (Mark shall be a straight line. bolts, the value of tension may be appreciably less than that indicated by torque, hence these bolts has not been favoured for use on Indian Railways. frb 20/10/97 00 - General Instructions Type Screw Dimensio n Unit 00 00 Extract from company standard BMW N 600 02. The nominal torque necessary to tighten the nut bolt 5 to a given preload can be determined either from tables, or, by calculation using a relationship between torque and the resulting bolt tension. Generally, rubber gaskets require. Diesetters should check the final tightening with a torque wrench from time to time to be sure that the tool is operating properly. Assembly Torque is the Standard Torque or Specified Torque, plus the Tare Torque. Loctite 262 (or equivalent) to the bolts and tighten them to 95 IN/LBS. is increased by two or. The bolts in a tension joint must act like clamps. the fixing has a hexagon bolt head as long as we bear in mind the inherent inaccuracy and are mindful of load relaxation. Bolt Tightening Table 1-3 Table 1-4 Table 1-5 Figure 2-1 1. r F Sin The effect of the force Fat angle (torque) is to advance the bolt outof the page. (1) Diameter & Threads per Inch (2) Stress Area Square Inches (3) Tensile Strength Minimum KSI (4) Proof Load in Pounds (5) Clamp Load Pounds (6) Torque, Dry, Foot Pounds. Otherwise apply general torque specs according to bolt. Bolt Tension Consistency. bolt selection calculation pdf. * Torque value based on 75% of proof load and finish as recieved steel NOTES: Left hand side of ‘-’ is minimum value PROPERTIES OF GRADE 10. Machine Design Bolt Selections and Design Dimensions of standard threads (UNF/UNC) Strength specifications (grades) of bolts. Ford 9 inch Torque Specs for Ford 9 inch center Section torque specs. Eye Bolts FORGED EYE BOLT WARNING AND APPLICATION INSTRUCTIONS Regular Nut Eye Bolt Shoulder Nut Eye Bolt Machinery Eye Bolt G-291 G-277 G-279 Important Safety Information— Read and Follow Inspection/Maintenance Safety: † Always inspect eye bolt before use. For example, consider the figure below. Metric bolt torque chart lists the typical maximum recommendations for tightening torques for metric bolts. 5 109 M14 2. PreSet Plus Drive & Trailer Nut 500 PreSet Plus Steer Nut 300 WARNING: Always tighten the top nut first to fully seat the brake drum on the drum pilot and against the hub face. The bolts in a tension joint must act like clamps. INSTALLATION AND INSPECTION OF HIGH STRENGTH BOLTS IN THE BUILDING CONSTRUCTION INDUSTRY While high strength bolts are one of the most important elements of the structural system of modern steel frame buildings and other structures, their installation is frequently misunderstood. Through Mr. Safety wire should always be installed so as to make the nut or bolt "TIGHTEN" itself when the safety wire has been installed. The torque wrench must be designed to detect initial torque-yield of the bolt and the test wrench must have the same accuracy as the wrench used on the actual hardware. Tightening Torque (inch-lbs. Continue with one final pass, torqueing the bolts in a clockwise sequence until all torque is uniform. A Bolt Torque Chart will give the estimated torque calculations. , DIN3121, DIN3129 • The above table shows German Standard (DIN) figures Metric Course Bolt Torque Chart. The 20" and 24" standard roof manholes use 16 and 20, 5/8" bolts respectively. Using the original mounting bolts, install the starter motor. Record the torque wrench reading, the date of test, and the rock. Wait 5 Min. 5 109 M14 2. Sample calculation: Assuming: An adjusting nut MRR 50x1. Maximum Recommended Tightening Torques. Retighten the middle 3 bolts, between the cylinders, to 20 ft/lbs. Application: Automatically feed and drive, one per cycle, an M8 x 85 mm long hex head bolt with molded washer to required 34 Nm torque. Torque curve for 310 MPa (45,000 psi) bolt stress Torque required for standard nut Torque Nm (lb•ft) Torque required for. The values presented in Table 2 - Coarse Tread Series (Metric Units) are representative and have been compiled for the user’s benefit. An invaluable tool for engineers, the torque. bolting torque table 2 - astm 193 grade b7 and astm 193 grade b16 stud bolts. (4) Tighten in two steps: Install new torque-to-yield bolts, and tighten in sequence to 27-32 N-m 20-23; Lb-Ft). Apply as necessary. Start the tightening procedure by lubricating the nuts and bolts. It will quickly and accurately calculate the maximum bolt tensile load, shear load, torsion load, and the recommended tightening torque among other things for any size fastener (US customary units only). Featuring torque controlled range of 25-100Nm and a 1/2" square drive with pin detent, our programmable 14. However, the scatter of the torque–tension relationship may significantly decrease the accuracy of the preload, which conflicts with the high requirement for mechanical accuracy in such precision assemblies. 20 for non-plated steel fasteners and K=0. Methods of inspecting the tightening torque Tm : Measuring torque Tt : Estimated tightening torque α : Coefficient 44 45 RS リン 3 TOHNICHI TORQUE HANDBOOK Vol. Use of shear bolt torque limiters is recommended to avoid damage to drivelines. This app provides a complete hydraulic troubleshooting guide,. Correctly tightened bolts make use of. If the gap is not. Torque Conversion. See All Products. TORQUE SPECIFICATIONS all readings in ft. Tighten nuts to 30% of this torque using the star pattern detailed in the figure below. 9 BOLT & NUT (ISO). Tighten the grip nut as in Inspecting Grips, page 4. bolting torque table 1a - cold service astm a193 and astm a320 grade b8, cl2 stud bolts. Bolt Tightening Torque AnswerSite is a place to get your questions answered. Bolt Torque. The torques given are based on using a 3mm thick 70 IRHD rubber gasket. Nut: Each bolt shall be tightened using a high strength nut, conforming to IS 6623. Hydraulics Guide. Disclaimer; These figures are estimates based on ASTM A193 B7 studs at 70% yield and should be used as a guide only. Obtain copy of Materials Divisions requirements for high. RECOMMENDED ASSEMBLY TORQUES Class 10. These values correspond with the values in the tables in the VDI Standard. Industrial gearbox maintenance pdf. 2) Align pipe and adjust bolts to produce a uniform gap between the flange faces. Various K Factors. use foot per pound (ft lb). from failing when tightening. Bolt clearance Listing of the minimum clearances between bolt and edges needed for a practical screwing operations. A Bolt in Tension. Retighten the middle 3 bolts, between the cylinders, to 20 ft/lbs. Browse Products by Master Ranges. ELECTRICAL CONNECTIONS. Set the torque wrench to the manufacturer’s specifications. bolt selection calculation pdf. 1 (or just calculate it if you don't have that handy), and that's the F that I'm usually shooting for. Download PDF. Bolt Torque Specs in Foot Pounds or (Inch Pounds) Size/Thread Grade 5 Grade 8 Grade ASTM-A574 Class Tensile Torque Reference Chart Metric (ISO 898) - Inch (SAE J429) Note: These charts are provided as a Reference only. If bolt elongation is not 0. Bolt tensioning methods require reliable tools, which is something Maxpro has provided to a range of different industries for more than 25 years. is increased by two or. After seating the belts in the groove and adjusting center distance so as to take up slack in the belts, further increase the tension until only a slight bow on the slack side is apparent while the drive is operating under load. frb 20/10/97 00 - General Instructions Type Screw Dimensio n Unit 00 00 Extract from company standard BMW N 600 02. erin criste is a staff engineer with AisC and can be reached at [email protected] Select hardware and design details. Tightening torque values are calculated from the formula T = KDP, where T = tightening torque, lb-in. Calculation of bolt tightening torque The contact pressure between shaft, tapered hub and clamp should be generated for the tapered joint to transmit designated torque. The calculator is generic an can used for imperial and metric units as long as the use of units are consistent. yields the bolt to the point they don't want you to reuse them (but I'm sure some do) I don't want to install new ones & then find out I installed them wrong & have to spend another $10 for new ones. Disadvantages of torque-controlled tightening: 1. Tests with bolts, nuts, lock nuts, inserts and locking inserts are provided to assess this approach, and the results show good agreement with measured preload. Proper tightening of flange joint assembly creates compressive forces on gasket and pre-tensioning in bolts. Bolt Tightening Sequence: Crisscross pattern: divide the flange into 4 quadrants. Operation Modes. The table below shows torque values that should be used when attaching cables to the battery terminals. Gasket Internal Min. Rec'd/Avail. Alternatively,use the Torque/Tension Calculator on the Norbar website which enables fastener and friction conditions to be modified. Re: API 650 Torque Values Date: February 2004. Protect your bolts - tighten them as recommended. In a bolted flange, the applied torque generates the axial load in the bolt. of tightening a bolt to "snug torque," and then continuing to tighten until a predetermined angle is achieved. The behavior and life of the joint depends on how tightly the bolts clamp and how long they can maintain their preload. measured Tare Torque value is less than the minimum listed, the lock nut must be replaced. When tightening an anchor bolt, most people give little or no thought to what effect their actions will have. It is hazardous if the plate swings due to wind pressure and hits the maintenance man when the wind is strong. If the bolt is a stainless bolt M6 x 1. Operation Modes. I used the torwue wrench on it set to 35 in/lbs and watch to see if it will turn it in more and it didn't which indicates that it's over 35 lbs of torque. 014” Cylinder Head Bolts 75 ft. A Bolt Torque Chart will give the estimated torque calculations. Note: There are no bolts fitted to the lower four holes. This bolt must be replaced before power can be restored. However, in usual applications, bolt tension is induced by torque on the nut and the bolt is subject to combined tension and torque, which may cause the. This bolt tightening method involves measuring bolt tension through things such as load indicating bolts and washers, along with techniques that calculate the length change of fasteners. These values correspond with the values in the tables in the VDI Standard. Assure accurate, repeatable fastening on assembly lines where production efficiency and quality control are essential. It has been designed with the vision of minimum input and maximum output. IAxial force and fatigue limit in tightening bolts ICalculation of axial f orc ea nd ti gh qu IExample CDetermine a suitable axial force to tighten the bolt within a range of elasticity in which the maximum value is 70% of the specified bearing force in the calibrated wrench method. 82 N·m] ∗1 Refers to the maximum holding force (torque) while clamped with the operating air exhausted. Grade 8 Bolt Drill & Torque Chart in Foot Pounds This technical information is supplied as a courtesy. Tighten toothed or serrated-type lock nuts to the full torque value. To use a torque wrench, adjust the handle and set it to a specific level of torque. Download PDF. The torque values are applicable for the type of gasket specified and bolts, nuts and washers should be free from damage, rust etc. Shear bolt torque limiters type LB are devices able to interrupt power transmission when the torque transmitted exceeds the setting. However, the following is what Dave had to. If you're very posh, like me, and you've got a thing about tightening torque, you might have a torque wrench with a dial on it which actually shows the torque as it increases. Screws for use with PEM prevailing torque locknuts should be Class 3A/4h fit or no smaller than Class 2A/6g. PDF | A method for calculating plastic clamp force from tightening torque was presented by considering a bi-linear model obtained from experimental tightening torque-clamp force relationships. See Torque Force Design Equations webpage and torque chart page for recommended fastener torque and equation data. >> return to top of page. Over 6,000 Automotive Torque Specs. There are many methods for measuring preload (see Table 12). imperialsupplies. They even have their own professional association - The Bolting Technology Council - which holds meetings and. Torque specifications are shown either as an exact figure, or a specific range. 115-20, 27 au29 sept. Rotational equilibrium is defined as the state of a system for which the. solve for the torque, T, needed to tighten the fastener. 60 lbf·ft [0. • Measure inductance of each reactor phase by applying 35 volts across each reactor and measuring corresponding current. drive axle nut torque. Example Calculation - Metric Units. *Use these values if you do not lubricate the bolt. Loosening of the bolt may develop during use. Assembly Torque is the Standard Torque or Specified Torque, plus the Tare Torque. 0 ft-lb) ^^^That's on page 17 of 19 of the PDF file, straight from SPT, which they claims comes straight from Subaru. Procedure for using the Plastigauge Type. For rotational motion, the same force can cause very different results. In a bolted flange, the applied torque generates the axial load in the bolt. Recommended Tightening Torque The integrity of the bolted joint requires that none of the components, including the bolt, be stressed beyond the elastic limit. Use the tightening torques in the table below, when screwing a fitting onto a piping port. So once you add a lubricant of any kind to the threads, all bets are off as to whether the same torque setting will truly secure the bolt. The second. applying torque to nuts. Some of the misunderstanding is a. The Tightening Factor is a measure of how much scatter there will be in the bolt preload. Note that torsion stress that occurs during tightening is not considered in this calculation. TORQUE-TENSION RELATIONSHIP FOR A307A, GRADE 5, 8 & 9 BOLTS Locknut Size Threads per inch Steel Hex Locknut Steel Hex Flange Nut Grade C FNL Grade 9 Grade F Grade G Clamp Load (lbs. For a successful assembly, tightening should be carried out with a slow smooth action. These bolt torque values are intended for use as guidelines only and are based on ideal conditions, perfect flanges, flange alignment & new well lubricated bolts/nuts according to the national boiler code, installed in accordance with the Central Plastics Company Flange Installations Guidelines. If the gap is not. Magnitude: (FSin )r. Calculate max stress in bolt when subject to a pre-load and determine its acceptability. F1554 does not specify tightening torques. If a wrench with a “cheater” extension or an improperly calibrated torque wrench is used to tighten an anchor bolt, the force applied may result in the epoxy chocks being loaded far above or below their design. The snug torque is the torque value that ensures that the joint components are clamped together and that all mating surfaces are in full contact. The updated part 1 also includes a higher level of precision designing of single bolt connections (ESV).