> All,
>
> I have a small milled part made from precipitation hardening stainless 46-
> 49 Rc.
>
> I need to face mill with a small insert cutter, rough and finish mill a
> slot just under 3/8" wide X 1/16" deep. I also have to mill some small
> narrow keys with a solid carbide key seat cutter. Probably 4-6 teeth due to
> small size. I can't use a saw as the keys are flush to the floor of the
> slots.
>
> Anyway just looking for some speed and feed data and maybe some tool
> vendors to try. I figure the home made key cutter will run at 90 SFM and
> maybe a thou or two per tooth (It's narrow). What I'm really not sure of is
> the end mills. I'm thinking a good coated 5/16" 6 flute end mill for
> finishing should run maybe 200 SFM and .001" IPT. The part finishes small
> and fairly thin walled. The finish mill has to put in some external radii
> using the periphery of the end mill. The end mall has to have dead sharp
> corners. ...

> D Murphy wrote:

>> All,
>>
>> I have a small milled part made from precipitation hardening
>> stainless 46- 49 Rc.
>>
>> I need to face mill with a small insert cutter, rough and finish mill
>> a slot...