billt460
Aerospace
- Nov 18, 2018
- 5
This subject comes up from time to time. And usually when it does, it falls into the same rabbit hole. Perhaps that is because it never seems to be examined from a common sense, practical standpoint. Everyone always seems to be too quick to pull out their engineering manuals. First off, let's examine the 2 biggest examples that come up against this practice. First is that the use of anti seize products on wheel studs will facilitate the loosening of the wheel nuts attached to them over time. The second is that the use of anti seize will cause over torqueing of the studs themselves. Thereby weakening and or stretching them, to the point of outright breaking them off.
Let's first look at number 1. If the use of the anti seize products would in itself cause the studs to become loose over time, it only stands to reason it would do much the same in most all other threaded applications it was used in. We know for certain that is not the case. Anti seize is used in several other automotive applications without any loosening of bolts or nuts it was applied to over time. Cylinder head bolts. Water pump mounting bolts. Spark plugs, and shock absorber studs and nuts, just to name a few. Anti seize is not only recommended in many of these applications, in many cases it is a must to avoid broken bolts in the future when they are removed.
Now let's examine number 2. In all forms of fastening with threaded nuts and bolts, a lubricated thread will require less torque to achieve the same clamping force, (or "pull" on the stud or bolt), as the same fastener that is used dry. So in this regard the statement is true. The same foot pounds of torque applied to a lubricated thread will achieve a greater amount of stress on the bolt or stud, than the same torque applied to a dry threaded fastener of the same size and type.
This additional force in the case of most automotive wheel studs is around 20% to 30%. So when anti seize is applied, all that is required is to apply around 25% LESS torque to accomplish the same task. The nut will not come loose. Nor will it be subjected to any additional stress. For example, if a dry wheel nut is rated to be torqued at 100 ft. lbs. when torqued dry. Then simply reduce the torque to 75 to 80 ft. lbs. if that stud has anti seize applied to it. Proper torque is what keeps nuts and bolts properly tightened..... NOT rusty, dry threads.
So in conclusion there is absolutely nothing "wrong" with using anti seize on lug nuts and studs. Any more than it is in other applications. It will not only transfer torque easier. It will also prevent rust and corrosion of the threads. And by doing so will facilitate the easy removal of said wheel nuts when the time comes. Without heavy, unnecessary torque that very well might cause the stud to snap off.
I have used anti seize on all of my vehicles wheel lugs and studs for the last 50 years. And I have NEVER had a wheel stud break. Or a wheel nut come loose... EVER. Nor have I ever heard of one doing so. With that said, I have seen on several occasions, studs break off from being frozen, rusty, and corroded. So in closing I will say I will continue this practice, simply because I have never seen, or come across a situation that has shown me it would be better to not.
Let's first look at number 1. If the use of the anti seize products would in itself cause the studs to become loose over time, it only stands to reason it would do much the same in most all other threaded applications it was used in. We know for certain that is not the case. Anti seize is used in several other automotive applications without any loosening of bolts or nuts it was applied to over time. Cylinder head bolts. Water pump mounting bolts. Spark plugs, and shock absorber studs and nuts, just to name a few. Anti seize is not only recommended in many of these applications, in many cases it is a must to avoid broken bolts in the future when they are removed.
Now let's examine number 2. In all forms of fastening with threaded nuts and bolts, a lubricated thread will require less torque to achieve the same clamping force, (or "pull" on the stud or bolt), as the same fastener that is used dry. So in this regard the statement is true. The same foot pounds of torque applied to a lubricated thread will achieve a greater amount of stress on the bolt or stud, than the same torque applied to a dry threaded fastener of the same size and type.
This additional force in the case of most automotive wheel studs is around 20% to 30%. So when anti seize is applied, all that is required is to apply around 25% LESS torque to accomplish the same task. The nut will not come loose. Nor will it be subjected to any additional stress. For example, if a dry wheel nut is rated to be torqued at 100 ft. lbs. when torqued dry. Then simply reduce the torque to 75 to 80 ft. lbs. if that stud has anti seize applied to it. Proper torque is what keeps nuts and bolts properly tightened..... NOT rusty, dry threads.
So in conclusion there is absolutely nothing "wrong" with using anti seize on lug nuts and studs. Any more than it is in other applications. It will not only transfer torque easier. It will also prevent rust and corrosion of the threads. And by doing so will facilitate the easy removal of said wheel nuts when the time comes. Without heavy, unnecessary torque that very well might cause the stud to snap off.
I have used anti seize on all of my vehicles wheel lugs and studs for the last 50 years. And I have NEVER had a wheel stud break. Or a wheel nut come loose... EVER. Nor have I ever heard of one doing so. With that said, I have seen on several occasions, studs break off from being frozen, rusty, and corroded. So in closing I will say I will continue this practice, simply because I have never seen, or come across a situation that has shown me it would be better to not.