Decent plunge cutters?

[Ewood42]

We do a LOT of plunge cutting, nearly every part we make has at least a few plunge cuts. I've been using Ingersoll DHU series insert mills for 1" and up (going about 17-18 IPM in 495B with with about .1XD WOC) and used flat bottom drills for 1/2"-3/4" (similar MMR). They do alright for our purposes, but there's always room for improvement. Any suggestions?

I've already tried using HSM practices just rotating the part off in B axis and cutting with a BNEM, but plunge cutting is faster given that there's no need for A axis indexes, our machines are S L O W 3+2 axis HMCs).

[jlw™]

I really like Iscar Tang Plunge.  I run it in 2.5in.  It's a beast.

 

[compressor sam]

try this seco the video is on there website, I have one here to trial, but not started yet

[jlw™]

I ran that Seco.  It doesn't do as well in 4140 and like materials.  I also prefer the flat surface the iscar leaves.  I'll run it and leave 0.02in/floor and then there is no semifinish.  It will also face like a mofo and leave a fantastic finish.

That Seco did really good in A36 tho.

[compressor sam]

18 minutes ago, jlw™ said:

I ran that Seco.  It doesn't do as well in 4140 and like materials.  I also prefer the flat surface the iscar leaves.  I'll run it and leave 0.02in/floor and then there is no semifinish.  It will also face like a mofo and leave a fantastic finish.

That Seco did really good in A36 tho.

That info is good to know, cheers

[Ewood42]

I'll have to give that Iscar a try. The Ingersoll DHU we've been using leaves a pretty good finish, but I was hoping to find something that can run faster and still leave a reasonable finish.

Features they cut are +/-.015", so accuracy is not as critical, just MMR and a reasonable enough finish that we can shot blast any obvious witness marks out. Use them for cutting the water/swarf grooves on the side of rock drill bits. As everyone here loves to say, "it's not going on the damn space shuttle."

Thanks for the lead!