This article will discuss the FTS-1 Fork Threader and how to properly use it to... thread forks.
This article will discuss use of the Park Tool BTS-1 and the Park Tool BFS-1.
If the removal threads for the crankarm puller in the crankarm are damaged, there is a possible repair. You will need a Bicycle Research TC-8, which is a fluted bolt that cleans the threads. It comes with a pivoting stud to align the tool concentric to the threads.
This article will discuss how to remove square type cranks with damaged threads.