Arbor washers for table saws,bench grinders etc.I have been trying to source them in Aus but they don't seem to be available,unless I am using the incorrect name.Are they just a machined washer with a raised edge or can they just be machined flat and are they made from special hardness steel? Also is there a supplier for enclosed spindles?Or do we have to make do with pillow blocks? and where can threaded shafts be purchased from? And are they made from hardened steel?Can enclosed spindles be made from pipe with a bearing in each end or are they made to specific specs also?Lastly Optical linear Rail can an off the shelf Die be used?