> 3. (Bonus) Forget the aluminum tab, unless your plate is very thick this > seems like a weak spot. Use some steel collars with real keyways, use steel > keyway inserts, and bolt through the steel collars to trap your aluiminum > plate. Then don't worry about the torque, it'll be big. > --Lawrence This also has the advantage that it will be much easier to drill a round hole in your plate than to punch out one with a tab in it. Bob Ammerman RAm Systems > ----- Original Message ----- > From: "Sean H. Breheny" > To: > Sent: Tuesday, April 30, 2002 12:11 PM > Subject: [OT]: Mechanical question > > > > Hi all, > > > > I'm trying to connect a drive shaft to a piece of aluminum plate. The way > > I'm attempting to do this is to pass the shaft through the plate at a 90 > > deg angle. The shaft has a keyway in it and I'm going to make the hole in > > the plate have a small tab that will fit into the keyway. I need to find > > out how much torque can be applied before the tab will break off. I know > > this probably has something to do with shear strength (and will involve > the > > dimensions of the keyway, diameter of the shaft, properties of the > > aluminum, etc.) but I don't know what method to use to figure this out. > > This is only a hobby project so all I need is a reasonable estimate. Can > > anyone help me out? > > > > By the way, the project (rotating platform for the antenna of my weather > > radar project, > > http://www.rocket-roar.com/BT/wsr.html ) DOES have several PICs in it, so > > this is at least remotely connected ;-) > > > > Thanks, > > > > Sean > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > > > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body