Grinding Wheel for mild Steel

Michael C · Jun 30, 2017

Been 40+ years since I have operated a surface grinder, and that was only occasionally. I finally have a machine headed my way for home shop. I have a Norton 5SG 46 J on the way based on recommendations here. I was wondering to get as fine a finish as possible if there were another choice in wheel, maybe a harder wheel in higher grit? Any insights would be appreciated. Machine is a Chevalier 618SP. If anyone is wondering why I am grinding A36, its what I used to make the base of a model engine, It already has hours of work in it and I would like a great finish , or at least better finish than I got using a facemill on BP.

Thank you
michael

rustytool · Jun 30, 2017

Watch this video. Higher grit doesn't always mean a finer finish.Grinding wheels and surface finish. - YouTube

Spyderedge · Jun 30, 2017

Just about any aluminum oxide wheel in the 36-60 grit and H-J hardness ranges can be used for mild steel with the correct feeds and speeds. I'd go for a 46I, it's better to go softer than harder. I use a 46h currently, and that's a but too soft for mild steel but perfect for tool steels.

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cash · Jul 1, 2017

Agree with Spyderedge, for A36 any wheel will about do. You will get a better finish by closing up your dress, cross the diamond slower when you are dressing the wheel.

A36 is very soft and a soft wheel will get eaten up fast by this material.

Spyderedge · Jul 2, 2017

cash said:
Agree with Spyderedge, for A36 any wheel will about do. You will get a better finish by closing up your dress, cross the diamond slower when you are dressing the wheel.

A36 is very soft and a soft wheel will get eaten up fast by this material.

Cash, could you please briefly explain when to use a closed or open dress? I use closed to hold a corner, but I'd be interested to know if there are other uses.

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cash · Jul 5, 2017

Spyderedge said:
Cash, could you please briefly explain when to use a closed or open dress? I use closed to hold a corner, but I'd be interested to know if there are other uses.

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Speed at which you cross the wheel over your diamond. An open or fast dress will cut free but leave a rough finish. A slow or closed dress will leave a nice finish.

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Grinding Wheel for mild Steel

Michael C

Cast Iron

rustytool

Stainless

Spyderedge

Titanium

cash

Titanium

Spyderedge

Titanium

cash

Titanium

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