Hello

[heath54]

Hi I am a newbie to CNC Zone. I have been manual machining for 36 years. Never really had to calculate speeds and feeds. Just went by feel. Now I have entered the conversational programing world on a lathe and mill. Is there a chart somewhere that can give me the surface footage for materials? Mainly stainless steel, inconel, titanium alloys and aluminum.

My main type of machining is short run engineering work and simple one or two cavity mold making. I was the 21st employee hired and now we have over 500. My company makes shock, force and vibration sensors.

I thank all who may help me.
Heath54

[g-codeguy]

Hi I am a newbie to CNC Zone. I have been manual machining for 36 years. Never really had to calculate speeds and feeds. Just went by feel. Now I have entered the conversational programing world on a lathe and mill. Is there a chart somewhere that can give me the surface footage for materials? Mainly stainless steel, inconel, titanium alloys and aluminum.

My main type of machining is short run engineering work and simple one or two cavity mold making. I was the 21st employee hired and now we have over 500. My company makes shock, force and vibration sensors.

I thank all who may help me.
Heath54

Best place to look is the manufacturer's insert catalog. Can learn a lot from them. Take the values with a grain of salt if you want decent insert life. Most charts are given for 15 minutes of cutting time.

Example on lathe. Sandvik specifies 1000 SFM for F.016 in 52100 with GC4225 grade. I run S900 and F.01 to F.012 with that grade. One thing I've noticed lately is that the other programmer runs the same grade at a higher SFM, but he is running larger diameter parts. I run smaller diameter parts spinning higher RPM. I can't use the SFM he does, or forget tool life. Yet his is good. Why? Don't know. Same coolant. Something else for you to think about, tho.