You can cure this three ways.
Threaded rod through bearing.
Tapping insert assortments for softwood.
An internally threaded rod end connects to threaded rods studs and other parts with male threads.
A threaded rod can come in a variety of materials.
Ball bearing rod ends are equipped with ptfe seals bonded to corrosion resistant caps.
Assortments include various sizes of tapping inserts.
Steelworks 1 2 in dia x 6 ft l coarse steel threaded rod.
Pvc electrical tape wrapped around the threaded rod.
Threads come in both coarse and fine.
Threaded rod is a shaft of composed of steel stainless steel brass bronze silicon bronze copper or other alloy which is threaded along its length.
The rod can be threaded in three directions including right hand left hand or both right hand and left hand.
The flange keeps these inserts from being pulled through a hole and provides a load bearing surface.
A tight fitting bushing between the bearing and the threaded rod.
Stainless steel threaded rod grades include 303 and 18 8 among others.
There is a gap between the seal bearing s id inner diameter and the threaded rod s od outer diameter i can t tell from your pic but it can be as much as 0 01 of an inch this can make the bearing out of center and wobble.
The fit of the 608 bearing to a size m8 nominally 8 mm metric threaded rod might be better.
Unequal threaded studs also have a self locking version which is suitable for a nut on one end and a tapped hole on the other.
Ball joint linkages with grease fitting along with excellent wear resistance these linkages have a grease fitting for easy lubrication.
The rod end body is selectively heat treated to provide a combination of a fracture tough head ductile shank and a carburized raceway to provide high load carrying capacity.
Install like a stud anchor just thread the anchor a nut and a washer onto the end of a threaded rod drive into a hole and turn the nut to.
With unequal there are more threads on one end.