machining time calculation

There are too many variables to give you a decent answer with so little information that you have provided.

If you are serious and will be doing a lot of these calculations then I would suggest software such as this:

http://www.cncci.com/products/mepro.htm

If this is only a one-time calculation - you need to provide a lot more information,

Cycle time equals {((length of cam divided by feed per rev) times 60) divided by spindle speed }plus the index time in seconds for a multiple spindle bar machine.

Length of cam is called throw. This should be for the operation that is the longest.

5/8" cam, .0064 in per rev feed; spindle 466 index 2.5 sec

= {((.625/.0064)*60)/466 }+ 2.5= 12.57+2.5=15 sec cycle time

milo

Milo gives a good answer for a machine that is only performing one function, but if your talking about a modern CNC machining tool (which you don't say what type of machine it is) then you need to repeat Milo's calculation for each tool in the chain and then add time for each tool change. Let's not forget the cycle time to change parts or pallets.

More information will get you a better answer.

Thanks labyguy.

I figured that if they had a cnc, they would already know how to do the math...

You gave good advice.

milo