How much tension do you need for a torqued bolt?
How much tension do you need for a torqued bolt?
Instead of 325 ft-lbs. you might need as much as 500 ft- lbs. to get to the same bolt tension of 39,000 pounds. Once the same bolt is left out in the steel work or in an open keg for a week, or worse, two weeks, it could take 700 ft-lbs. to reach 39,000 pounds of tension — if the bolt doesn’t break!
How much torque do you need to remove a nut?
It would seem, then, that if you torqued a nut or bolt to exactly 100 lb-ft, removing it would require exactly 100 lb-ft of torque applied in the opposite direction.
How much torque does a BER Bolt have?
ber bolt tightness is actually measured in TENSION (stretch), not TORQUE (twist). This 7/8” A325 bolt has experienced only 25,000 pounds of tension before it broke in torsion (twist) while someone applied 800 ft- lbs. of torque.
What’s the best way to lubed a torque table?
Lubricate all contact areas of the bolts and washers. Lubricating the bolts is the suggested method. Lubed means cleaned, dry bolts, lubricated with standard medium viscosity machine oil. Lubricate all contact areas of the bolts and washers. Lubricating the bolts is the suggested method. Nom Dia-Pitch Nom Size x Pitch INCH BOLT TORQUE TABLE
It would seem, then, that if you torqued a nut or bolt to exactly 100 lb-ft, removing it would require exactly 100 lb-ft of torque applied in the opposite direction.
Instead of 325 ft-lbs. you might need as much as 500 ft- lbs. to get to the same bolt tension of 39,000 pounds. Once the same bolt is left out in the steel work or in an open keg for a week, or worse, two weeks, it could take 700 ft-lbs. to reach 39,000 pounds of tension — if the bolt doesn’t break!
How big is the stress on a bolt?
Stress Nominal Number Diameter Area 7,500 psi 15,000 psi 30,000 psi Diameter of Threads of Root at Root Clamping Clamping Clamping of Bolt Per Inch of Thread of Thread Torque Force Torque Force Torque Force (inches) (inches) (sq. in.) (ft. lbs.) (lbs./bolt) (ft. lbs.) (lbs./bolt) (ft. lbs.) (lbs./bolt)
What kind of torque does a lug nut need?
So as we all know the lug nuts must be torqued at 107 Ft-Lbs. Great! But who can tell me what kind of torque is required to loosen a lug nut that was torqued at 107 Ft-Lbs?
