2) Align pipe and adjust bolts to produce a uniform gap between the flange faces. Torque Settings Suggested Starting Values The below estimated torque calculations are only offered as a guide. measurements, or to metric units. Nut: Each bolt shall be tightened using a high strength nut, conforming to IS 6623. 2014 HBM nCode Products User Group Meeting 5 • From physical testing, the effect of bolt tightening in natural frequencies was demonstrated using several torque conditions using a sheet metal bar. p atad bolts (as received). one example, the bolt itself is tested for strength by the manu-facturer by screwing the bolt into a standard testing fixture and subjecting it to pure tension. 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. Procedure B. Where the accuracy of the device relies on springs, the adjuster. ASTM A193 B7 grade bolts are made of Alloy steel, AISI 4140/4142 quenched and tempered and are intended for use in pressure vessels, valves, flanges, and fittings. Loosening of the bolt may develop during use. Discover a universal assistant for all of your unit conversion needs - download the free demo version right away!. The calculations are based on a friction coefficient of 0. These Figures represent an estimate of torque (torque being the measurement of friction, not tension) required to induce given preload (clamp load) in a bolt for non-critical. Procedure for using the Plastigauge Type. NOTE 2: The above-mentioned torque values are based on A193 B7 bolts with A194 2H nuts. This bolt must be replaced before power can be restored. The 5 step guide to torque tightening for leak-free flange connections Obtaining a leak-free flange connection can be a difficult task on-site without a plethora of equipment to fall back on. It has been designed with the vision of minimum input and maximum output. 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. 80 40~ 60 0. Describe specifications requirements for cleaning and painting of bolts. Pipe clamps offered in this section are designed for support and attachment of pipe to structural members. The values presented in Table 2 - Coarse Tread Series (Metric Units) are representative and have been compiled for the user’s benefit. If the gap is not. From direction of wind, to free position, to figuring out your torsion spring’s torque. Torque each nut to approximately 30% of the required torque. (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. Before using a given torque table, these assumptions should be verified to insure they are appropriate for the specific application. locking fasteners, break-loose torque is higher than initial tightening torque (installation torque) T i. Pressure Gasket Stress Torque/Bolt Gasket Stress Torque/Bolt. Bolt Tightening Torque. Materials Carbon Steel is used in the manufacturing of riser and pipe clamps. While a click-type torque wrench can identify when the selected torque has been reached, it cannot diagnose excessive torque. 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. This fastener bolt torque calculator will Estimate the unknown torque, diameter, axial force applied and coefficient of turning friction for the given conditions. This factor is affected by the condition of the fastener, the lubricant used and the condition of the flange. How to use reference values - Preload and tightening torques. Department of Transportation Federal Highway Administration by the. Wait 5 Min. Euromech Colloquium NR 110 Rimforsa, p. What bolt torque you specify needs to be not only based on calculations, but also on experience. ITH ALPHA software offers process evaluation, for example automatically generated Excel- or PDF-protocols. Apply suitable axial tension It is best to do axial tension control for tightening screw, but ac-tually it is difficult to measure. Alternatively,use the Torque/Tension Calculator on the Norbar website which enables fastener and friction conditions to be modified with ease. These produce a 90% utilization of the bolt yield strength. The all-metal locking mechanism causes eventual damage to the protective coating of the threads on both bolt and nut. If we then tighten the bolt by 95º, the load should be 23,700-26,200 N. In handling the plate outdoor, have its upper zone (above its center). A problem exists because friction has a large influence on how much torque is converted into preload. The rotation Of a bolt (torque) at some point causes it to stretch (tension). 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. • Measure inductance of each reactor phase by applying 35 volts across each reactor and measuring corresponding current. Large-diameter flanges may require additional tightening passes. Thread Torque Reference Chart The se spe cifications are for carbon steel, with Zinc plating always lubricate threads and seals For stainless steel, use the high value of the torque range of steel. From direction of wind, to free position, to figuring out your torsion spring’s torque. Standards for the torque-tension relationship in fasteners cover tests for determining it on both externally and internally threaded fasteners, tightening procedures, and quality control methods for those procedures, as well as laying out the interactions between all the applicable variables at play between different physical forces. For each cylinder head, start with head bolt numbered one. The tightening torque equals the total torque applied minus the prevailing torque. In structural applications in the US, per the RCSC (PDF Warning) it would be typical to tighten 3 bolts out of each batch against the machine, using either a torque wrench, or by turning the nut a certain number of degrees past 'snug-tight. Then Grout the voids below the base plates- 3 or 4 or more. Basic specs are free and open to everyone They usually include engine images, displacement, dimensions and weight, essential bolt tightening torques, plus characteristics of the engine e. Bolt Tightening TECHNICAL DATA Bolt Tightening 2 Bolt Tightening 2-1 Various Tightening Methods Various tightening methods 34 2-2 Screw and Torque Relation formula between screw and torque 35 2-3 Torque Coefficient (1) Formula of torque coefficient 36 (2) The torque coefficient is not stable 36. These produce a 90% utilization of the bolt yield strength. 13 1/2" 7450 48 35 80 59. Torque Calculator-this app is intended field estimation of a torque value based on stud size or nut size and lubrication. - Specific bolts, nuts, washers, pins - Edge distance, wrench clearance, hole size 6. There are various guidances available to calculate theoretical torque figures, but following EN 1090-2 (pt. Use the tightener on the end of the handle to lock it in place. Case #2 The nuts were cracking on a hydraulic assembly. ) Tightening Torque Tightening Torque Tightening Torque Tightening Torque Bolt Clamping Force (lbs. There's nothing wrong with using a torque wrench and a new washer, but after tightening many bolts with a torque wrench and tightening bolts in general you can develop a feel for when a non-critical bolt is tight enough but not over tightened. Download free 1KD ENGINE TORQUE SPECS ebooks in PDF, MOBI. ASME PCC-1 - Free download as PDF File (. Fastener Specifications (LS3) Fastener Tightening Specifications Application Specification Metric English A/C Compressor Bracket to Engine Block Retaining Bolt 58Y 43lbft A/C Compressor to A/C Compressor Bracket Retaining Bolt 22Y 16lbft A/C Drive Belt Tensioner Pulley to A/C Drive Belt Tensioner Retaining Bolt 50Y 37lbft. For a successful assembly, tightening should be carried out with a slow smooth action. Torque is the rotational analog of force: instead of Fnet = ma, the equation is Tnet = Iα. 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. Re-tightening to the required torque must be done whenever the bolt loosens. Jump to page: But, can you post the page number where the info can be found in the pdf, because I can't. Select hardware and design details. It takes more force to tighten a 3/4-10 bolt than to tighten a 3/8-16 bolt it is larger in diameter. of tightening a bolt to "snug torque," and then continuing to tighten until a predetermined angle is achieved. Liner bolts fail (break or loosen off) for several reasons but our extensive experience demonstrates that these can be eliminated if the pre-load is correct. Doing so can result in terminal post breakage, terminal post meltdown or a fire. The tightening of the bolt and nut produces a tensile pre-stress, which is approximately equal to the compressive stress introduced in the joint material. 3), tightening of non-preloaded bolts shall be conducted as follow: EN 1090-2:2008+A1:2011. and tightening torque) follows the corresponding equation according VDI 2230. Tighten the nuts to finger tight and check the alignment of the flange faces and gasket. API 650 specifies full-face gaskets. anchor bolt calculation. Simply enter a stud size or nut size and a lubricant and get a torque value. When I talked to the user, he made the comment that he was 100% certain he used a torque wrench to tighten the bolts before use (documented here by 'Apacherider'. and tightening torque) follows the corresponding equation according VDI 2230. PDF format Tabulating data from bolt-load calculations is an easy way to speed the design process. For bolting specifications that do not have a published proofload, it is usually calculated at 92% of minimum yield strength. For a successful assembly, tightening should be carried out with a slow smooth action. VOC Home | FAQ Home. Remove the gap by tightening the set bolts until the front of the U-racket is snug against pipe, then make one more full rotation of the bolt. mounting plate. Search Products. Recommend Documents Bolt Tightening Torque Calculation. Bolt clearance Listing of the minimum clearances between bolt and edges needed for a practical screwing operations. The bolts in a tension joint must act like clamps. Download PDF. Guidelines for Pressure Boundary Bolted Flange Joint Assembly AN AMERICAN NATIONAL STANDARD ASME PCC-1–2010 (Revision of ASME PCC-1–2000). Assembly Torque is the Standard Torque or Specified Torque, plus the Tare Torque. When selecting a bolt for a critical application where installed measurement is not possible I will always stretch test several bolts from. So, when the clamping of a joint is critical, then it is best practice to add additional clamping force (more bolts) or if that isn’t possible, then to study the torque to tighten vs. a rock bolt or its anchor. Bolt & Nut Tension, not bolt & nut torque Which choice of: Bolt pattern, Bolt Torque specification, Bolt Heater, Bolt grade, Shear bolt, High strength bolt, Stainless bolt, Aluminum bolt? Why all these choices, just to get tension into a joint? Engineers take classes on bolt & nut specs, so why do some bolts fail?. OVER TORQUE or UNDER TORQUE them to achieve this! 2. 4 (2389) KA24DE-34-41-105-112: 105-112. EngineerDog. First round - 30% of final torque (flange. This calculator will calculate torque given the lead screw parameters and the required force. Lead Screw Torque and Force Calculator. Before continuing with the installation, check the torque converter to make sure it turns freely; install and tighten the torque converter to the flex plate bolts. It is integral part of an iPitch. for bolts lubricated with MOS 2 compound and with cadmium-plated connecting elements on both sides, the tightening torque should be. The calculator below can be used to calculate the torque required to achieve a given axial bolt force or load. Tighten all bolts by 80-90 degrees 6. 80 40~ 60 0. 70% of the rated yield strength when the torque method is used. Torque Tension Testing of Fasteners used for NASA Flight Hardware Applications Ed Hemminger*, Alan Posey* and Michael Dube* Abstract The effect of various lubricants and other compounds on fastener torque-tension relationships is. Contact Atlanta Rod Bolt Size TPI Proof Clamp Tightening Torque (ft lbs. Nut: Each bolt shall be tightened using a high strength nut, conforming to IS 6623. 3 f - 568 class 9. The K Factor is an experimentally determined constant that relates the torque applied to the load induced in the fastener. ITH ALPHA software offers process evaluation, for example automatically generated Excel- or PDF-protocols. Determine the correct tightening torque from the above tables. desired fi nal torque by 0. 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). The default value for the friction in the threads and under the nut face of 0. Bolt Diameter (D) Nut Factor (K) Bolt Torque (T) lbf/ft P. Brochure - Training Course on Torque Tightening-Best: Practice Guidance Torque-Tightening-Best-Practice-Guidance-Online-Training-Brochure. 014” Cylinder Head Bolts 75 ft. solve for the torque, T, needed to tighten the fastener. ) Tightening Torque Tightening Torque Tightening Torque Tightening Torque Bolt Clamping Force (lbs. Bolts are graded by tensile strength and are easily identified by the number of slash marks on the head of the bolt. Stretch new bolt per § 23-33, and drill new nut and bolt per § 26-34. ) 5/8” 27100 19000 200 3/4” 40100 28000 355 7/8” 55500 39000 570 1” 72800 51000 850 1 1/8” 80100 56000 1060 1 1/4” 101750 71000 1495 1 3/8” 121300 85000 1960. After tightening to the proper torque, bend the tabs of the lock straps up against the bolt heads to lock the bolts in place. Bolt Tightening Table 1-3 Table 1-4 Table 1-5 Figure 2-1 1. tightening torque with which ultimate clamp force is gained Only informative sections of standards are publicly available. For example, the 0. Screenshot of Bolt Sizing Calculator I have found this calculator to be immensely helpful. bolting torque table 2a - cold service astm a320 grade l7 stud bolts. Fasteners standards pdf. The all-metal locking mechanism causes eventual damage to the protective coating of the threads on both bolt and nut. Wait 5 Min. 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. This interruption in power is caused by the shearing of a bolt. We have Carter Brothers Brake Bands and 4-3/4" HEAVY DUTY Carter Brothers Brake Drums available on our Band Brakes Page. Tightening torque calculation Calculation of tightening torques and bolt parameters in table format using the standard Motosh formula. Using the stem example above, it may only require 5Nm of torque on the clamp bolts to secure a handlebar in the. 2 Apply a preset torque to the rock bolt or its anchor, increasing the torque in small increments until just sufficient to cause the face nut to rotate. If your wrench is twice as long (2 feet) and you’re applying the same amount of force to the handle (30 pounds), you are going to be applying 60 ft/lbs of torque to the bolt or nut. In my world working with 10s of thousands of foot pounds the break out torque is higher than the make up torque. Over 40 bolts: tighten two adjacent bolts at the. Standards for the torque-tension relationship in fasteners cover tests for determining it on both externally and internally threaded fasteners, tightening procedures, and quality control methods for those procedures, as well as laying out the interactions between all the applicable variables at play between different physical forces. The first factor is the bolt's diameter. Place the bolt into the connection with the washer under the nut. It is defined by user in the proof load percentage $ 0,2% proof strength of the bolt. Torque is the rotational analog of force: instead of Fnet = ma, the equation is Tnet = Iα. Several cross tightening methods are available such as hand torque, … Continue reading Bolting Torque Calculations. The torque that corresponds to a value of pretension will vary depending on the thread fit, nut surface condition and tightening Up By Erin CristE steelwise A look at the nuts and bolts—of nuts and bolts. Due to nature of this type of product, assemblies for non-preload connections, there are no torque figures available. ; K = torque-friction. Actually I am using M3, M4 and M5 ST screws for fixing the plastic parts together. pdf), Text File (. Place the second pair of washers on the bolt and mount the nut. Available Torque Values for Full Face 1/16" thick gaskets in ANSI B16. For bolting specifications that do not have a published proofload, it is usually calculated at 92% of minimum yield strength. VOC Home | FAQ Home. Fastener Specifications (LS3) Fastener Tightening Specifications Application Specification Metric English A/C Compressor Bracket to Engine Block Retaining Bolt 58Y 43lbft A/C Compressor to A/C Compressor Bracket Retaining Bolt 22Y 16lbft A/C Drive Belt Tensioner Pulley to A/C Drive Belt Tensioner Retaining Bolt 50Y 37lbft. applying the torque. com Bolt tightening torque values are given in Table 2-3 and are typically sufficient for obtaining a seal. If the bolt is long enough, the final torque-tightening, hydraulic bolt-tensioning tension stress can be safely brought very close to the yield reduces the dimensions of the assembly and/or the point without any risk of exceeding the latter. 9 ISO Metric Coarse Pitch Bolts & Screws Bolt Tension Recommended Corresponding to Assembly 65% of Proof Load Torque kN Nm 7. Torque curve for 310 MPa (45,000 psi) bolt stress Torque required for standard nut Torque Nm (lb•ft) Torque required for. It is just as important to carefully select an appropriate tightening torque for securing machine screw joints as it is for securing bolt and nut joints. Key Tool: Stretch Gauge. Calculation of Axial Tightening Force and Tightening Torque. Use of shear bolt torque limiters is recommended to avoid damage to drivelines. Bolt Load Calculation Software Hydratight introduces Informate: the next generation of software that provides bolt loads and tool pressures on a huge range of flanged joints and clamped connections. docx Issued by: Manager Engineering 10 January 2007 Uncontrolled on printing Page 4 of 10 AS/NZS 2451: Bolts, screws and nuts with British Standard Whitworth threads (rationalized. Select hardware and design details. Download PDF. Download free 1KD ENGINE TORQUE SPECS ebooks in PDF, MOBI. Tighten the nuts to finger tight and check the alignment of the flange faces and gasket. A "short form" equation for converting between torque and tension has been developed: T = K×F×D. This is mainly due to corrosion and deformations in the bolt and nut threads. Several factors affect how much tension occurs when a given amount Of tightening torque is applied. The electronic pdf version of this document, available free of charge 4 Calculation of tightening torque of foundation bolt if using a torque 6 Calculation of. However, only about 10% of the torque applied is transferred into clamping force. Includes an explanation of how and why this is useful, particularly on cars. UNF thread, Screw joint calculator. Various K Factors. 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. frb 20/10/97 00 - General Instructions Type Screw Dimensio n Unit 00 00 Extract from company standard BMW N 600 02. continue to optimize. Cylinder-head bolts used to be tightened with a precisely defined torque in several stages within the elastic elongation range of the bolt material (chart - bottom left). Different types of stresses developed in screw fasteners due to initial tightening. The rotation Of a bolt (torque) at some point causes it to stretch (tension). · The fatigue strength of bolt under repeated load should not exceed the specified tolerance. Torque Curve for 45,000 psi Bolt Stress Torque Required. 15 Attachment. What Torque Should Be Used To Tighten Metric Machine Screws? A lot is written about bolt and nut tightening, but little is written about tightening machine screws. The piston will travel forward and rotate the pitch wheel to tighten the nut. Do not over-torque. Repeat, using the same sequence, gradually increasing the torque through a second and third stage until the recommended final torque is attained. Rotation: 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. Tighten fastener to rotation specified in TABLE 2. Calculate max stress in bolt when subject to a pre-load and determine its acceptability. More torque may be needed to get the bolt to stretch to the proper amount. Description of Bolt Torque Tables Nominal Raised Face Raised Face Gasket Number Size of Bolt Torque Comp Force Max. The wheel torque specifications should be in your owner’s or workshop manual. Roof Manholes and Shell Manholes. As the bolt is tightened, it is stretched (preloaded). The fatigue strength of bolt under repeated load should not exceed the specified tolerance. 5 Liter Engines Cylinder Liner Protrusion. Joint Separation. 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. Theoretical testing showed that 1/24 turn-of-the-nut would guarantee sufficient fatigue performance. Use the tightener on the end of the handle to lock it in place. The following table lists general torque specifications for common brands and components. 5 to 2 N·m. The all-metal locking mechanism causes eventual damage to the protective coating of the threads on both bolt and nut. K Factor is a torque coefficient between bolt and receptacle. We recommend that you use a 4mm or 5mm hex driver with an inch pound torque wrench to do this. Cylinder Stroke [mm]. The mechanics of a bolt in tension are less complicated than for a bolt in shear. 5 Double Shear Bolt. Presented below are the results from TORQUE for a M12 Grade 8. 9 ISO Metric Coarse Pitch Bolts & Screws Bolt Tension Corresponding to 65% of Proof Load Recommended Assembly Torque Diameter Pitch (mm) kN Nm M5 0. Bolts can be made from many materials, but most bolts are made of carbon steel, alloy steel, or stainless steel. Allow grout to harden 48 hours before fully tightening foundation bolts. ) Tightening Torque Clamp Load (lbs. 5 270 103 371 132 528 164 722 190 914 248 1339 303 1817 To convert kN to lbf: Multiply kN by 224. Relating Bolt Torque to Bolt Tension Best way to measure bolt preload is by relating measured bolt elongation and calculated stiffness Usually, measuring bolt elongation is not practical Measuring applied torque is common, using a torque wrench Need to find relation between applied torque and bolt preload. Re: Bolt Tightening Torque Values for the Foundation Bolts 06/09/2014 10:59 PM Mount the Vessel on Concrete Base -lightLY tighten Bolts - while Vessel axis is Plumbed with wedges below baseplates. Selected examples illustrate the calculation process. The all-metal locking mechanism causes eventual damage to the protective coating of the threads on both bolt and nut. The calculations are based on a friction coefficient of 0. Torque is the rotational analog of force: instead of Fnet = ma, the equation is Tnet = Iα. TIGHTENING TORQUES AND THE TORQUE-TENSION RELATIONSHIP All of the analysis and design work done in advance will have little meaning if the proper preload is not achieved. METRIC BOLT TORQUE CHART PDF. Practical advice Tightening torque Product Stripping PZ n° (mm) (mm) single cable multi cables (mm) mini maxi mini maxi Connection DB90 - 6 - 3. Start by tightening the bolt(s) to half the maximum torque allowance and tighten the bolts 1/2 turn at a time until the components are secure. + 90° Piston Protrusion. tighten fl ange bolts in 5 ft-lb increments to required specifi cations (See Torque Sequence Chart). (Low tightening torque and bolt loose will cause fluid leak. How to torque lugs…and why! Let’s first start with the “Why?” aspect of tightening lug nuts. Fasteners standards pdf. Clean the cable connectors and the battery terminal posts with a small stainless steel wire brush before connecting them together. Torque specifications are shown either as an exact figure, or a specific range. If clutch fluid does get on a painted surface, wipe it off immediately. •Tightening Torque A bolt tightening torque to fasten the coupling to the shaft. 5) Install safety chain attachments (sold seperately). These bolts are said to be in "double shear" and can transfer twice as much force as a bolt in single shear. Bolts can be made from many materials, but most bolts are made of carbon steel, alloy steel, or stainless steel. The transmission jack can be removed at this point. 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. 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. Take a look at diagram B in figure. * Flanges larger than DN600/NPS24 are usually considered equipment flanges, for which generic torque tables are not provided. The stress area is the effective cross-sectional area of the bolt that resists bolt fracture. lbf} CAUTION: Clutch fluid will damage painted surfaces. Bolt Tightening Table 1-3 Table 1-4 Table 1-5 Figure 2-1 1. The default value used by the program of 1. A trick: to keep the the torque converter locked deep into the transmission pump while it is wobbling on the jack or being lifted up to the engine block, so it doesn't shudder out forward, use a 3/8" wrench attached to a torque converter dust-cover hole using a dust-cover bolt. Pressure Gasket Stress Torque/Bolt Gasket Stress Torque/Bolt. Due to the wide variation of FRP flange materials, designs, and manufacturing processes, the user must confirm that torque. • Tighten pump and motor hold-down bolts before aligning shaft or connecting the piping to pump. 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. Bolts with conical heads lead to high tensile stresses under the head and must be avoided, see figure 3. doc Metric Bolt Torque Specs. The majority of the questions the industrial customers have concerns the tightening torque needed to obtain the desired preload. Specified torque: 27 ft. As per bolt tightening methods or guidelines, cross tightening sequence is followed. Place the second pair of washers on the bolt and mount the nut. 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. Used for attaching a rope or chain. My advice would be to follow Carroll Smith's guide when selecting proprietry fasteners, or indeed designing & making your own, & heed Carrillo's advice on the effects of lubricants on tightening torque's. Apply suitable axial tension It is best to do axial tension control for tightening screw, but ac-tually it is difficult to measure. If the bolt is a stainless bolt M6 x 1. Tightening Torque Hex Bolts The tightening torque values given in the above table serve only as a guide. Likewise, trying not to be too heavy-handed can leave you with loose bolts and critical components, such as the stem, handlebar, and seat post, can shift mid-ride, causing you to lose control and possibly crash. Impact wrenches or air powered screw drivers are not recommended. 8 bolt with Grade 10 nut, this will cause thread rip off in bolt at rated torque of grade 10 nut •If lower torque joint will not be preloaded hence chances of loosening the connection in operation. Use torque wrench & tighten all bolts gradually and regularly in diametrically opposite sequence in several pass, until the tightening torque (as per screw size indicated) is reached. Assembly Torque is the Standard Torque or Specified Torque, plus the Tare Torque. For torque tensioning, ±20% accuracy might be reasonable, so the load could be 4800-7200 N. xls), PDF File (. March 19, 2016 By Sigma Fasteners. Breakout torque cannot be accurately calculated, however, depending on conditions it can take up to 2 1/2 times the input torque to breakout. Stainless Steel and other materials are available. bolt-nut joint tightening process is one of the core processes in the full production bolt tightening process includes various uncertainties such as the presence of (3) F. To view the full content, you will need to purchase the standard by clicking on the "Buy" button. They do not include any safety factor and should. STEP 1 With the valve in the closed position, place. Set your torque wrench to 110-120 ft/lbs (140-150 ft/lbs for the Cambridge). Corrosion had a major impact to the torque – tension relation. The rotation Of a bolt (torque) at some point causes it to stretch (tension). In some cases, the techniques require special equipment and, in other cases, the verification itself may be somewhat subjective. 9 Type: hexagon headed bolt with shank (AB) EN ISO 4014, Tightening: with torque wrench The connection is made using through bolts (notation as specified in VDI 2230:2014 - bolted joint) with nuts, with washers under the nuts and under the bolt head. DESCRIPTION This section contains information on the correct usage and identification of bolts, flat washers, lock wash-ers, nuts, lock nuts, fittings and torque data. bolt (torque) at some point causes it to stretch (tension). Tightening Torque (inch-lbs. Common bolt torque values can be looked up, but finding an accurate reference isn’t always easy. Step 2 - Tighten 90 degrees; Step 3 - Tighten another 90 degrees; 5. The all-metal locking mechanism causes eventual damage to the protective coating of the threads on both bolt and nut. Before using a given torque table, these assumptions should be verified to insure they are appropriate for the specific application. 15 for plated fasteners. The Tightening Factor is a measure of how much scatter there will be in the bolt preload. Torque each nut to full torque. The K Factor is an experimentally determined constant that relates the torque applied to the load induced in the fastener. These Figures represent an estimate of torque (torque being the measurement of friction, not tension) required to induce given preload (clamp load) in a bolt for non-critical. Discover a universal assistant for all of your unit conversion needs - download the free demo version right away!. There are various guidances available to calculate theoretical torque figures, but following EN 1090-2 (pt. He reported he used a Park Tool torque wrench that only goes to 60 in-lbs which is the max torque recommended by Thomson for the bolts). 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. article explores how bolt torque should be calculated and applied to seal a flanged connection. table 3 - suggested torque values and clamp loads for sae grades 2, 5, & 8 cap screws nominal diameter and tpi (inches) thread stress area (sq-in) sae grade 2 sae grade 5 sae grade 8 clamp load 60-90% proof (pounds) tightening torque (ft-lbs) clamp load 60-90% proof (pounds) tightening (ft-lbs) clamp load 60-90% proof (pounds) tightening (ft-lbs). When the proper bolt tension is reached, the tip of the bolt will shear. Use of its content by anyone is the sole responsibility of that person and they assume all risk. Generally bolt tension is used to impose surface pressure shown in figure 3. 0Ah or High Capacity 3. Joint Separation. 0 The maximum tightening torques are: Only applicable to shaft screws with metric standard and fine threads acc. As per indian standard, calculation use to calculate tightening torque for all classed bolt,. Tighten bolts to 25-30 ft-lbs to ensure a small amount of preload, then tighten one side to the manufacturer's specs in one solid motion. Torque Bolt Tables PAGE: 17. How to measure - bolt fastening and Force clamp One of the original and most commonly used method of attaching parts together is by means of a threaded fastener, however the threaded joint and its fastening is a complicated matter. F1554 does not specify tightening torques. of tightening a bolt to "snug torque," and then continuing to tighten until a predetermined angle is achieved. For a successful assembly, tightening should be carried out with a slow smooth action. The instructions for the Hilti Kwik Bolt 3 say "tighten the nut to the recommended installation torque". However, the following is what Dave had to. Designing a torsional spring can be a more difficult task than other springs like compression and extension. Suggested Maximum Torque Values for Screws and Bolts. - Specific bolts, nuts, washers, pins - Edge distance, wrench clearance, hole size 6. 5 Typical tightening procedure for bolt/double nuts assembly Tightening Torque Tightening Torque ø Locking Torque F Clamp force Clamp force Locking force Lower nut ød Upper Nut d2 ød d ød2 ø 2 T1 T loc loc T2 ≈ 1 F'≈ F The locking force should be as high as possible. However, only about 10% of the torque applied is transferred into clamping force. The behavior and life of the joint depends on how tightly the bolts clamp and how long they can maintain their preload. The electronic pdf version of this document, available free of charge 4 Calculation of tightening torque of foundation bolt if using a torque 6 Calculation of. To use a torque wrench, adjust the handle and set it to a specific level of torque. Powers lists maximum tightening torque for their Power-Bolts, but other manufacturers list recommended torque. If the bolt is long enough, the final torque-tightening, hydraulic bolt-tensioning tension stress can be safely brought very close to the yield reduces the dimensions of the assembly and/or the point without any risk of exceeding the latter. 18 K Factor listed above is based on the following conditions: 1. Using the original mounting bolts, install the starter motor. Torque: 49 Nm (36 ft. In structural applications in the US, per the RCSC (PDF Warning) it would be typical to tighten 3 bolts out of each batch against the machine, using either a torque wrench, or by turning the nut a certain number of degrees past 'snug-tight. As shown in Figure 3, a 10% increase in the tightening torque causes a 21% increase in. Conversion and Torque Specs Chart. Suggested Tightening Torques for other ALLOY Socket Screw Products (INCH-POUND) Nom Size 114. March 19, 2016 By Sigma Fasteners. Disclaimer; These figures are estimates based on ASTM A193 B7 studs at 70% yield and should be used as a guide only. Use of shear bolt torque limiters is recommended to avoid damage to drivelines.