2 flute vs 4 flute cutters

Tom,
I have a '55 president state sedan in the shop right now. Power steering, power brakes, power windows. I've got the nose off it now to rebuild the suspension & replace the rusty fenders. Besides the Studebakers I've got a '54 Kaiser & a '26 model T.
Mike S

most of us don't always have a choice as to how many flute end mills we use like many other tools there are better uses and reasons to use them. if that's what you have use it. it might be slower give a worse finish but it will still get the job done. a lot of tooling avail. is based on production needs and reasons. are you doing production? bill

No, no production. I make a lot of "one off" parts for different projects (like replica ww2 vehicles). I needed a new 9/16 cutter & the package I ordered came with both 2 & 4 flutes. As most of my cutters are a mix of everything, I was just curious as to the best or preferred times to use a 2 flute tool. I didn't want to waist it on normal stuff if it had a particular special use or characteristic that it should be saved for.
thanks,
Mike Sal

ok then use what you have 2 flute tend to be rougher on the machines more chip load per rev. not that it would really hurt the machine slower feed rate. the rule of thumb I used to teach my apprentices is .001" laod per tooth so you don't rub the endmill dull. bill