What boring bars for my 3/8" Bridgeport boring head?

[Firstram]

Not really much to it.

If you turn the endmill properly just the tip of one flute will stick out furthest and this becomes your cutting edge.


You can, and I have specially ground endmills for this purpose, but it’s not required.

I use them all of the time in my 7x as boring bars, just a little kick to the left for clearance. A boring head holds it square, I would have thought the entire flute would rub.

 

[RaisedByWolves]

I use them all of the time in my 7x as boring bars, just a little kick to the left for clearance. A boring head holds it square, I would have thought the entire flute would rub.

If it were spinning in a circle it would.

But it’s not spinning, it’s moving forward in a circle so the edge of the flute does not stick out as far as the tip of the flute.

 

[Jason812]

I'm going to have to try this.

 

[RaisedByWolves]

I'm going to have to try this.

Its a great way to repurpose endmills that have a broken edge or are dull, and they are stiffer than woodpecker lips.