Bolt torque values pdf

The following torque values are to be used on all fasteners unless otherwise. Bolt torque calculator calculate required bolt torque. Accepted formulae relating torque and tension,based on many tests are. Always replace shear bolts with identical property class. Shear bolts are designed to fail under predetermined loads. The bolt torque table below provides information such as tension, torque, tpi for the heavy structured bolts against its corresponding bolt sizes ranging from 12 to 1 12.

Lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. Running torque should be included in the values listed in the tables because any torque puts shear load on the bolt. Recommended bolt torque table size recommended torque grade 2 grade 5 grade 8 188 ss bronze brass. Torque steel grade sae 5 sae 8 socket head cap screws property class 8. Torque values chart for common bolt sizes intpi1 n m2 ftlb3 n m ftlb n m ftlb mm x pitch4 n m ftlb n m ftlb n m ftlb 14 20 7. Stainless steel fasteners tend to gall, especially with long run downs, prevailing torque fasteners, impact drivers, and lack of lubrication. Use these values if we supplied equipment with vibrator drives attached. Lubricated refers to fasteners in the as received condition, which is normally a light preservative oil coating on unplated fasteners and no oil coating on plated fasteners. Installation torque tables for noncritical applications. Most torque values are based on nonlubricated fasteners. These produce a 90% utilization of the bolt yield strength. Clamp load calculated as 75% of the proof load when specified by the standard. M p x d 5000 these formulae may be used for bolts outside the range of the tables, m torque lbf.

This document is the property of flexitallic us, llc and is not to be reproduced, transmitted to another, nor used for the purpose of manufacturing of. The below estimated torque calculations are only offered as a guide. Refer to the manufacturers service manual or examine the engine to determine where the bolt holes lead. After obtaining preliminary torque values calculated from the formulas, a 65% of the pullout load was taken to obtain safer values for each fastener size and each parent material thickness. Torque values chart for common bolt sizes n tractor club. Iso 724 metric threads dimensions of metric threads according iso 724. Values calculated using industry accepted formula t kdp where t torque, k torque coefficient dimensionless, d nominal diameter inches, p bolt clamp load, lb. Fill, sign and download bolt torque chart online on. 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.

Because the calculations specified in the torque chart below are offered as a guide only, it is the sole responsibility of any person using them to assume all risk. Recheck all bolt torque values after the initial drive runin, and periodically thereafter. Tightening torque chart for metric bolts hobbiesxstyle. Torque in pound foot or pound inch torque in newton meter nm lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. T wrench torque nm, lb f ft k constant that depends on the bolt material and size. The torque figures quoted have been based on a theoretical bolt load equal to 85% of the proof load of the bolting. There is no torque difference for fine or coarse threads. Metric bolts head and wrench sizes ansiso, din and. 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 torque values in table v have been calculated as noted in the footnotes, by using formulas from reference 3. Grade c lock nuts equal 75% of the bolt proof loads specified. The values shown in the chart are to be used as a midrange guideline. Bolt tension corresponding to 65% of proof load recommended assembly torque diameter 1 sae threads per inch tpi lbf lbft grade 5 14 37500 625 grade 8 14 53000 883 to convert kn to lbf.

Technical information on fastener torque values used in the maintenance, repair or assembly of harleydavidson motorcycles. Standard maintenance practice dictates that mechanics add this value to the specified torque. 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. Astm a325 is an astm american society of the international association for testing and materials international standard for heavy hex structural bolts. An bolt torque for oil free cadmium plated steel nuts and bolts inch. Bolt size mm, pitch mm, bolt hex mm, strength grade nm. Astm a193a193m b8 and b8m class 1 torquetension guide. Rear derailleur mounting bolt 7086 sram 7085 campagnolo 3 rear derailleur cable inch bolt 35 campagnolo 53 sram 3545 rear derailleur pulley wheel idler wheel bolt 2734 sachs 4453 wheel, hub, rear cog area component shimano other by brand spoke tension torque is typically not used in wheels. 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. Suggested bolt tightening torque in nm newton metres these torque levels are guideline values for metric standard threads in accordance with din iso 261 and head sizes in accordance with din en iso 4762, din en iso 4032, din en iso 4014, and din 9312, 6912, 7984 and 7990. A similar table was published in product engineering by arthur korn around 1944.

These formulae may be used for bolts outside the range of the tables overleaf. The circles represent the diameter of the stranded wires. There are many variables affecting the torquetension relationship, such as human error, surface texture, and lubrication. Continued tightening to the recommended torque level will over insert the bushing. If you are unsure of the proper torque value to use, here is a general chart of fastener torque values. Lubricated bolts and reduced torque lubrication effect on bolt tension and torque. Do not use these values if a different torque value or tightening procedure is given for specific application. In preparing this guide to torque values, the following basic assumptions have been made. These torque values were then verified by testing samples of different bolt and parent. Lightly coat bolt threads and the underside of the bolt heads with motor oil. The second method, gasketed, uses a low gasket seating bolt torque, applied to a soft elastomeric gasket, for lower pressure applications like landfill gas collection or use with torque limited pvc or fiberglass flanges, followed by the mandatory re torque 4 hours to 24hours after the initial torque.

Because of these existing variables, the only way to determine. Jan 24, 2018 tightening torque chart for metric bolts by reza 24 jan, 2018 leave a comment chart for sae metric bolts wrench sample bolt torque chart templates in pdf suggested tightening torque values metric co threads vdi 2230. After reaching the recommended bolt torque value once, stop. This table is based upon grade 5 fasteners, generally used harleydavidson motorcycles. Metric bolts tightening torques engineering toolbox. Bolts are new, standard finish, uncoated and not lubricated other than the normal protective oil film. Use of its content by anyone is the sole responsibility of that. Improvised torque wrench improvised torque wrench with luggage scale. Recommended maximum bolt loads and torque values unc threads. The relation between applied torque and axial force or load in a bolt can be calculated as. Torque values for 14 and 516in series are in inchpounds. Threads per inch 307a astm a307 grade a sae j429 grade 5 sae j429 grade 8 f n l g 9 fnl grade 9 clamp load lbs. 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.