Hey everyone, so I'm a tool room CNC programmer. I was running a part the other day out of 4140 with a carbide rougher (link below), and I was told that I'm babying the cutter.
I was doing slotting, so 100% width of the tool, and was doing .100" per pass, and was creeping around 3IPM. Here's where it gets interesting.. I went back and checked the Feeds n Speeds (link below) and it recommends 1x DIA and 1x WOC to cut at 330SFM and .0016ipt
That converted out to doing a 1/2 woc, 1/2 doc, spinning 2521rpm, feeding at 16.1345ipm
Is it just me, or does it sound like that cutter is going to break? I'm not doing Trochoidal cutting, just a straight linear feed line.
I'm not used to machining at that aggression, but I need to make my tools last longer and get the job done at a more reasonable time.
1/2 4fl carbider rougher 1.25LOC
tool: Guhring.com: RF100 VA/NF standard length variable helix roughing-finishing ENDMILLs for stainless steels - Series 3081
speeds n feeds: http://www.guhring.com/Documents/Tec...n=080417012615