Transcription of Suggested Tightening Torque1 Values To Produce ...
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Suggested Tightening Torque1 Values To Produce ...
CATALOG 13D01002003004005006007008009001000 Tightening torque (inch-lbs.) Tightening TorqueTightening TorqueTightening TorqueTightening TorqueBolt Clamping Force (lbs.)Technical DataSuggested Tightening Torque1 Values To Produce Corresponding Bolt Clamping LoadsNotes:1. Tightening torque Values are calculated from the formula T = KDP, where T = Tightening torque , lb-in.; K = torque -frictioncoefficient; D = nominal bolt diameter, in.; and P = bolt clampingload developed by Tightening . Clamp load is also known as preload or initial load in tension onbolt. Clamp load (lb.) is calculated by arbitrarily assuming usablebolt strength is 75% of bolt proof load (psi) times tensile stress area(sq. in.) of threaded section of each bolt size. Higher or lower valuesof clamp load can be used depending on the application require-ments and the judgement of the Tensile strength (min psi) of all Grade 7 bolts is 133,000. Proofload is 105,000 Tensile strength (min psi) of all Grade 8 bolts is 150,000 load is 120,000 : Fastening Reference.
Tightening Torque for Unlubricated Steel Bolts. 5/16" -18 3/8"-16 1/2"- 13 5/8"-11 3/4"-10 10,000 9,000 8,000 7,000 6,000 5,000 4,000 3,000 2,000 1,000 0 SAE Grade 2 Bolts SAE Grade 5 Bolts SAE Grade 73 SAE Grade 84 Tensile Size Bolt Stress Tensile Proof Clamp2 Tensile Proof Clamp2 Clamp2 2 Dia. Area Strength Load Load Dry Lub. Strength Load ...
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