Winston wrote:
So 'dragging' isn't design requirement?

http://www.youtube.com/watch?v=6BvhZxfMPDU
....

Dragging does seem to be a common "feature". But if I were buying or
building one, I'd want "lift". In 7th grade I had metal shop & when we
were taught to use a manual hacksaw, it was "lift on the back stroke".
I'd say it's just as important, if not more so, for a power hacksaw.

Bob