This is a handle off an old Hardinge Cataract split bed lathe cross slide. I want to remove a broken small handle, labeled "A" in the photo below, and replace it with an unbroken one. Before I start to remove the part that is broken, I'd like to know from someone who has some experience with these handles, is the small handle, "A", pressed into the ball, "B" ? Or is the threaded? I had assumed it was pressed in, and tried to remove it from another handle but couldn't with quite a bit of force. I also couldn't unscrew it with quite a bit of torque. So I'm asking before I go any further.
Irby

Irby
