[Newbie] Speed Feed Chart

I know that there are formulas to figure speeds and feed for milling but I was wondering if there is a chart that would show what it is needed. I am new and spending way to much time trying to figure this out. Another problem is there a difference speed between 2 and 4 flute, roughing of plain mills. What about speeds for face mills and fly cutters. Over the weekend for example I needed to cut a step in the edge of a steel plate. It is .750 deep and .250 from the edge. I started with a 5/8" roughing mill .250 from the edge and a .200 depth of cut, I tried cutting speeds from 345 to 1180 and was not climb cutting. My mill (PM 932m PDF) either it was chattering bad at lower speed or the machine was laboring. I tried some smaller mills and some larger ones both finishing and roughing with similar results. I ended up using a 3/4" end mill with 3 carbide cutters. I was .250 from the edge and started with a .100 depth of cut. The best speed was 1180 RPM and I was able to increase the depth of cut to .200. Now my project was moving along but I spent almost 2 hours before settling on the carbide tipped endmill. Any help would be appreciated.

Unless you are in a production environment with heavy machines and flood coolant, ignore the feed and speed charts or at least cut the values in half.

It really looks like your spindle speed was too fast for the 5/8 rougher, and maybe not enough feed. It could also be that the 5/8 is just too big for your machine. Try using a 3/8 or 1/2 rougher, much less load on your machine. My machine is quite a bit larger than yours and I rarely use 5/8 roughers.

As far as face mills and fly cutter speeds, just go by the diameter like you would do with any end mill. To get a fine finish, sometimes I bump the speed way up, and limit the DOC to 0.001-0.002. But this requires sharp tools.

Start making a note book and record ehat eorks for you. You can use a spring loaded center punch to test hardness of materials. Althoigh it wont give you a rockwell or brinell hardness value, it will give you somthing to estimate to next time.

Sent from somewhere in East Texas Jake Parker

Here is a good place to start, slow everything down when not using flood coolant.
It's free as well
http://zero-divide.net/?page=fswizard

I use the one in my G0704 manual.
Cutting Speed x 4) /Tool Diameter = RPM
Cutting Speeds for High Speed Steel (HSS)
Cutting Tools
Workpiece Material Cutting Speed (sfm)
Aluminum & Alloys 300
Brass & Bronze 150
Copper 100
Cast Iron, soft 80
Cast Iron, hard 50
Mild Steel 90
Cast Steel 80
Alloy Steel, hard 40
Tool Steel 50
Stainless Steel 60
Titanium 50
Plastics 300-800
Wood 300-500
Note:
For carbide cutting tools, double the cutting

speed. These values are a guideline only.
Refer to the
MACHINERY'S HANDBOOK for

more detailed information.
Figure 22
.
Cutting speed table for HSS cutting

tools.