Threading and Grooving Stainless Steel 304

We have been machining few small components in SS304. After various permutations and combinations we have not been able to decide on the toolings,machine speed and feed to be used for proper machining of these components. Though the finish achieved is within acceptable limit but tool life is a big problem. We are getting poor tool life for both threading and grooving operation.

Job specifications:
Groove width: 2mm
Threading: M14x1.5mm

Total length of Job:22mm
Distance of groove from one end:15mm

It would be helpful if anyone would advice on tooling and machining parameters.

Thanks in advance.