I'm on my second Black and Decker push mower, corded type. I have a small lawn, so avoiding running over the cord is not a major problem. I won't advise on motor or batteries, but I can say B&D has a plastic shim in the stack of washers holding the blade to the motor shaft. Said shim has raised edges which grip either side of the blade, and an opposing pair of edges which grip in turn a keyed, square washer above the blade. This square washer is driven by the motor, and the blade is driven by the plastic shim. Hit too hard an obstacle, and the plastic edges shear off and the blade rotates freely.
This is effective, but is also a wear point, and I've learned to buy the shims by the half-dozen. My eyes don't always find the rocks in the yard before the blade does :-( Best regards, -- Cal Frye, www.calfrye.com /Be an Internet Sceptic/ Stop. Think. Connect. www.stopthinkconnect.org - Be at least as safe on the Internet as you are crossing the street! "I sincerely believe that banking establishments are more dangerous than standing armies." -- Thomas Jefferson, letter to John Taylor. > Michael Ross <mailto:michael.e.r...@gmail.com> > April 28, 2014 12:58 PM > I have an old simple ICE push mower, that might be worth converting. > > ... > What about the shock of the blade hitting something nearly immobile? That > is a lot of shock that small engines are able to handle - special > consideration in the regard with electric motors? > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140428/339eb705/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: compose-unknown-contact.jpg Type: image/jpeg Size: 770 bytes Desc: not available URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140428/339eb705/attachment.jpg> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
