When cutting to vinyl the engineer will cut at around 35hz anyway, so no point sitting anything down there.
As for how low do I go personally.
It depends, there are no standard eq`s you should apply to any sound or instrument other than when correcting for a recording medium.
Sometimes my kicks will sit mostly at 80hz and the bass may be below that going down to 60 or 50.
sometimes I`ll sit the kicks around 100-120 and let the bass have loads of room from 80 down to 45.
Sometimes I sit the kick right in the middle of really big bass, and pull it`s frequencies out from the bass.