Bamboozle
Well-known member
Wear or a cracked female ferrule. Close examination with magnification most times will reveal a crack.I've never had one come apart, but I have had sections continually turn on my fly rods no matter how much ferrule wax I use. Maybe that comes from wear, I don't know.
A properly fitted male ferrule also should be sanded to match the internal taper of the female, a step frequently omitted on many rods. As a result the contact area between the two is limited to a few spots and as result, the fit is never great to begin with.
That bad fit causes folks to seat the ferrules too hard and many times that causes cracks in the female.