Milling: creating a smooth end finish in a slot

**magicniner** · 27-11-2016

HSS is a sharper edged tool which is less fragile and more forgiving than Tungsten Carbide tooling but will not take the temperatures associated with High Speed Machining so at the cost of reduced RPM you get less chance of the tool chipping.

You may be running the carbide cutter too fast without enough cutting lube/coolant, unless the heat is being removed you can get some smearing of the work material and as soon as that happens it will clog the cutter and give a result exactly as in your photograph, if you get the same problem when running the cutter faster I'd then put money on this being the problem ;-)

- Nick

**Rob Meades** · 27-11-2016

Well I say, there are a lot of choices to be made here. I will go look at HSS tools and investigate the possibility of a cooling system along the lines described by @Boyan Silyavski.

**A_Camera** · 28-11-2016

Originally Posted by Rob Meades

Well I say, there are a lot of choices to be made here. I will go look at HSS tools and investigate the possibility of a cooling system along the lines described by @Boyan Silyavski.

Have a look at this feed rate calculator:

http://www.daycounter.com/Calculator...lculator.phtml

Free, online and easy to use.