Block with helical slot

Hi,
I am trying to get a helical cut in my model and the problem isthat I want the profile of the cut to remain vertical while itfollows the helical path (just like it would be manufactured i.e.the tool is stationary while the part rotates and translates).

Tried to adjust the settings of the swept cut, but wasn't able toget a cut that would represent the actual part. I have an image ofthe part attached and would highly appreciate any suggestions.

ThanksSolidworksParts And Features