please can you help me wit some advice concerning:
1) I have a Hilka 350W bench grinder motor which has an arbor sticking out of each end, comprising an M10 nut on a threaded portion, and a 1/2" diameter section on which the grinding wheels fitted.
I want to fit some sort of 6"-8" diameter rigid plastic/aluminium disk to it so that I can stick emery cloth disks to it and bear down on the face of the disk, using a tool rest, so I can smooth/shape bits of wood and plastic.
What sorts of search terms ought I to use to find something suitable? I can find lots of things to fit M14 spindles on angle grinders but that won't do.
2) Also - my other 6" bench grinder is intact and does have a coarse and a fine wheel fitted. is it safe to use the outer face of said disk(s) as an abrasive surface for softer materials (wood, plastic, perhaps aluminium)? I can fashion a suitable tool rest but I a worried about forces acting out of the plane of rotation, compared with the normal mode of use i.e. when the outer edge is the grinding surface.
I've got two bench grinders rather like this, one without wheels and covers, and the other intact: http://pop.h-cdn.co/assets/cm/15/05/54cb16d1c8206_-_bench-grinders-01-0713-lgn.jpg
I want to turn the incomplete one into something like this: http://www.cnccookbook.com/img/OthersProjects/Tools/DiscSander1a.jpg
This man's DIY is something similar to my aspirations: https://woodgears.ca/reader/hessam/disk_sander.html
I want to stay safe, but I also want to make use of the spare motor, so any advice would be welcome.