The FRB 12 series from SKF is a line of cast iron locating rings designed for precision positioning tasks. These rings are typically used in machinery that requires high accuracy in alignment, such as in bearing housings, machine tools, and industrial equipment. If you're working on projects that demand reliable and repeatable positioning, these rings can be a solid choice.

One thing worth noting is their robust construction. Being made of cast iron, they offer excellent durability and can withstand heavy loads without deforming. This makes them particularly useful in harsh industrial environments where components need to maintain their shape under stress.

Engineers tend to reach for this when they need a simple yet effective way to ensure precise alignment between mating parts. The rings can be easily inserted into holes or slots to provide a stable reference point, which is crucial for assembly processes that require minimal tolerances. Another practical use case is in maintenance scenarios where replacing worn-out parts needs to be done accurately to maintain system integrity.