Plunge line

[v-6]

On a blade that's 1/4 " thick , what size of round file do you use to create the plunge line.
Vern

 

[Patrickknives]

I only use 1/8" chainsaw file on all plunge lines, although I typically just use the edge of the belt. But when I have the feeling or need some cleanup its a chainsaw file. It does have one side flat so I can work the plundge over without going deeper if needed.

 

[Rusty McDonald]

I use my grinder to get that rolled edge on the plunge

 

[LRB]

Use a round file the thickness of the blade. This cuts roughly halfway the diameter of the file at the edge giving a flow to the plunge. Just a rule of thumb I use. If using a file guide this will not allow an under cut to occur.