Last aerospace company I worked for used to use them a lot, we had a 8 inch grinder with a drill chuck either end and a plywood template to cut the circles of scotchbrite around, they were mounted on a 1/2 inch bolt with a couple of ply washers supporting them and that was it. Used to get a lovely finish with them on stainless bits but you need a mask and safety glasses because of all the bits and dust that comes off the scotchbrite.

Not sure if THESE are the same type of thing as they say they are used to produce a satin finish on metal. Have been thinking of trying them if anyone has any experience of them.

I also looked at the M3 ones and found them expensive

Hi

I'm not sure that they were the same thing but I worked in a place with a big floor scrubber that used similar looking pads. Odd pads were often available, so I suppose you could cut circles and after a few revolutions I suspect the circles would trim them selves.

G

Baz, sounds much like using a Scotchbrite type of wheel in a Dremel. The bits that fly off them is best kept out of the workshop.

Martin C

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Which just goes to demonstrate a point that I have previously tried to make:

Similar to the situation with “loctite” … merely referencing a trade name is not enough !

MichaelG.

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Ref. https://www.model-engineer.co.uk/forums/postings.asp?th=176664&p=1

Edited By Michael Gilligan on 17/09/2023 08:51:22

For the sort of things we do I would recommend the 3M unitized discs, about 3" dia with the rolok attachment on a 4.5 angle grinder. They come in a wide array of grain size and for cleaning or satin finish are very good. They will take cast brass from as cast to satin, but be warned they are a lot more agressive than you might think. Their not cheap. Best used in the open as the particles will get everywhere. Noel.

PS When they were first about, they supplied a kit with a range of grits and the rolok fitting at a reasonable price to get you hooked.