Replacing the Jaws on a 3 Jaw ChuckWebmaster2023-04-19T16:23:42+00:00 Replacing the Jaws on a 3 Jaw Chuck Strating with # 1. The jaws are numbered on the side of the jaw and goes in the slot with the same number. Please view Video: https://www.youtube.com/watch?v=913OQOhMMAg This 3 Jaw Chuck will work on a Brake Lathe with a 1 inch arbor and will open to over 5 inches. Click on the link on the right to view all tools.