- Joined
- Nov 23, 2017
- Messages
- 1,191
I never heard of one, and do not understand why Jacobs would make it that way. After a Google search, I found 2 pics. I guess the spiral could pull the key in, making it take less pressure to tighten the chuck. Just a guess on my part.View attachment 295553View attachment 295554
I have one of these chucks and this is the first time I have seen a chuck key for it..... I use mine as a paper weight....