Transcription of Recommended Maximum Torque Values - MINT …
1 9 Recommended Maximum Torque ValuesMTorque in 2011715619526031241646858570230M 2215821126435242256363479295032M 242022703374495397198091011121336M 27298398497663795106011931491178941M 304055406759001080144016202025243046M 3355073491712231467195622012751330150M 36708944118015731888251728323540424855M 399191226153220432452326936784597551760M 4211391518189825303036404945555693683265 M 4514251900237531673800506757017126855170 M 4817162288286038134576610168648580102967 5M 5222102947368449125895785988421105213263 80M 5627373650456260837300973310950136871642 585M 6034044538567375649076121021361417018204 2290M 6441005466683391101093214576163982049824 59795M 6849636617827111029132341764619851248142 9777100 The information supplied here is intended to be an acceptable guide for normal conditions.
2 For critical applications, further informationand research will be following basic assumptions have been made:a. Bolts are new, standard finish, uncoated and not lubricated (other than the normal protective oil film).b. The load will be 90% of the bolt yield The coefficient of friction is The final tightening sequence is achieved smoothly and lubrication is to be applied to the nut/bolt, multiply the Recommended Torque by the appropriate factor shown in the table on page , use the Torque /Tension Calculator on the Norbar website which enables fastener and friction conditions to be modifiedwith - Total Torque for Calculating the Effect of Torque Wrench ExtensionsM1 = M2 x L1/L2 Where L1 is the normal length and L2 is the extended length.
3 M1 is the set Torque and M2 the actual Torque applied tothe extended lengthL1 normal lengthCentre of handleTorque Conversion Factors1 = = = = = = = UnitsImperial UnitsMetric to beconvertedFormulaeAccepted formulae relating Torque and tension, based on many tests are:-M =P x D60or for metric sizes:-M =P x D5000 These formulae may be used for bolts outside the range of the tables,M = Torque =bolt tension lbfD =bolt = Torque =bolt tension NewtonsD =bolt x = Nl/s x = = x = l/sPressurePowerlbf/in2x = barhp x =kWbar x = lbf/in2kW = x rev/min9546 ExampleThe required Torque on the fastener is130 (M2) but what do you set onthe Torque wrench scale?
4 L1 = 500 L2 = 650(units of length not important, this is a ratio)M1 = 130 x 500/650M1 = 100 See our Torque Unit Converter on the Norbar website and apps for iPhone and Android smartphones.
