You can use an electric drill instead of a handcrank.
http://www.reelmowers.info/
And video, too
http://www.ehow.com/video_4418694_sharpening-reels-push-mower.html
http://www.reelmowers.info/
And video, too
http://www.ehow.com/video_4418694_sharpening-reels-push-mower.html