What tool for cutting v jaws

[Naiveambition]

I am making a v jaw plate for my vise to hold round stock. It will be 1.380 tall by 6 inches long and trying to find a way of cutting the valleys. I am wondering if I could use a small ball endmill for most stock removal then switch to a 60* countersink to finish. Using flat plate cold rolled steel.

Don't have angle plates or a tilting vise so looking for an alternative. Here's the tool I plan to use. Can it handle it?

 

[Blogwitch]

Just angle the jaw in the vice by 45 degrees and use the corner of a normal milling cutter. It might be a degree or two off an exact 90 deg. 'V' because of the undercut angle on the milling cutter, but it will hold just like an exact one.

John

 

[ruzzie]

I have had success using a 90 deg Spotting Drill.

 

[Blogwitch]

Just in case you didn't understand what I was on about, here is how I do it.
This is for a tailstock 'V' for drilling a hole in the centre of a bar, tube or even a square bar if you want to drill it corner to corner, but the principal is exactly the same for plate work.

First mark off where you want the 'V' to be, then set up to 45 degrees in the vice. Ensuring that you have a cutter diameter larger than the length of the side of the 'V', just start cutting downwards. Yours, for plate work, will be from the opposite side face.

Then cut down until the edge of the cutter 'splits' the line you have drawn on there. This will get you within a couple of thou of being an equal sided 90 degree 'V', perfectly good enough for 99.99% of what we do.

Hope this helps

John