The winch is held on by 4 blots. And I looked up the part numbers and they are not grade 8. Let’s say I’m wrong and they are. The rope, hook, and shackles rated higher? The winch is rated at 12k so can it pull a 8k truck completely off the ground? Say it can. What will fail first? Maybe the bolts holding it all together??
Allow me to get nerdy:
Tensile strengths and yield strengths are expressed in pounds per square inch in U.S. measurements. To determine the maximum load a bolt can carry, multiply the cross-sectional area of the bolt at the greatest thread depth by the tensile strength of its material. For example, a 1/2-inch grade 8 bolt with 13 threads per inch has an effective stress-carrying cross section of 0.1419 square inches, so its breaking load would be 0.1419 (area subject to stress) x 150,000 (tensile strength) = 21,285 pounds.
if the bolts are the weakest link? Should they be??