The roller bearings adapters can be applied to any 100 ton truck applications or to any 6-1/2×12 roller bearing journal size.
They are available with hardened crowns (HC), or with hardened crowns and thrust shoulders (HCT). These are indicated on the outer edge of the bearing adapter.
Wear limits for bearing adapters are indicated by the worn crown surface to the level of the relief at the center and ends of the adapter. Adapters should be replaced in kind when any crowned area is worn to the point where the relief area is contacted by the truck frame.