[dek]

foremans giving me hell what smpm or sfpm do you use with carbide tipped
endmills i.e p20 or toolsteel

[tc26]

Many insert manufacturers will recommend a particular insert for a given material, and will then give a range of speeds ( sfpm or smpm ) and feeds.
Machinerys handbook should give you a basic starting point for most materials.
Here is a link to an online speed/feed calculator that has speeds and feeds for different materials.
http://www.whitney-tool.com/html/cal...SpeedFeed.html

[denjo]

depends on what your trying to achieve.... roughing, finishing? tolerances and surface finishes will have a big impact on how aggressive you can be....eg: in 4140 i run a 3/4" dia. indexable carbide 2 flute emill at .060" doc at 2400 rpm & 36 ipm, when i'm finishing with a 1/2' DIA. solid carb 4fl emill in the same mat'l i run at 750rpm at 6.0 ipm to achieve +-.0005 x 2" dp. & re-run the tool to take the deflection out. works great! and i get the most mileage out of the tools....the ruffing tool is cooled by air only, finisher with coolant.

[dek]

thanks tc26 you dont know how much thats helped me the chart ive been using only gives solid carbide feeds the whitney tool company site is really useful

[bill faber]

what should my speed and feed be for cutting 304 stainless with 6 inch saw blade .125 thick using a vertical machining center

[tc26]

You need to know how many teeth in a cutter to calculate feed.