Never used a chaser. Always used a tap, die, or triangle file. Ok I've read all the data I've found about why you should use Thread Chasers to clean threads instead of just a tap or die. They say the chaser has duller cutting edges (less angle) and is slightly less diameter than the tap and terms like less aggressive than the tap.

Always used a tap, die, or triangle file. Ok I've read all the data I've found about why you should use Thread Chasers to clean threads instead of just a tap or die. They say the chaser has duller cutting edges (less angle) and is slightly less diameter than the tap and terms like less aggressive than the tap. Here is what gets me.

In other words, thread chaser bolts and nuts are not made from hardened material like taps and dies. Therefore, they remove dirt and corrosion from threads without shaving off metal. On the other hand, taps and dies are aggressive and tend to cut. Therefore, they are only good for retapping or creating new threads on a damaged bolt.