Proper method for determining bearing clearances?
Every bolt stretches when tightened, that's how they work. The key is to NOT tighten it to the point that they don't restore themselves. If it stretches and can't return to it's original dimension, it's experienced plastic deformation.
At that point, it's "gone soft" as a previous poster put it.
The bolt tension should only be eighty to ninety percent of its yield strength, depending on application.
Think about your lug studs. If you had to replace them every five uses, you'd never make it to a new set of tires without replacing studs, assuming you rotate your tires when recommended.
Rods and mains' bolts have a limited re -use spec due to the fatigue nature of the application; fully torque they're still seeing cyclic stress thousand of times a minute.
If you tightened them to the plastic deformation point they would not last an hour.
And I'm the engineer that determines how tight you tighten the bolts at the torque station. If you take it to plastic deformation, you done fucked it.
Every bolt stretches when tightened, that's how they work. The key is to NOT tighten it to the point that they don't restore themselves. If it stretches and can't return to it's original dimension, it's experienced plastic deformation.
At that point, it's "gone soft" as a previous poster put it.
The bolt tension should only be eighty to ninety percent of its yield strength, depending on application.
Think about your lug studs. If you had to replace them every five uses, you'd never make it to a new set of tires without replacing studs, assuming you rotate your tires when recommended.
Rods and mains' bolts have a limited re -use spec due to the fatigue nature of the application; fully torque they're still seeing cyclic stress thousand of times a minute.
If you tightened them to the plastic deformation point they would not last an hour.
