HELP - Hard steel...

[snowshovelbmx]

if you have the 4 inch grinder then just get a zip cut disk and cut right through it...really not to tough at all. Don't worry about going through the hardened skin then using a regular saw or lathe or anything this just complicates things...at 20mm thick just zip right through it.

[Coogrrr]

I obtained 3 cutoff discs for the 4" grinder and will be going at it with that. I was so worried when I tried to hacksaw it and didnt scratch the surface

BUT!!!! I think I got 'er now! Let ya know soon.

[rchprks]

chuck it up in a lathe use a low rpm 250-300 use a coated carbide part off tool. the shaft shown is probably case hardened .060 deep so after you get thru the hardened stuff you should be o.k.
rick

[davereagan]

Home Depot carries 6" abrasive cutoff wheels made by Norton, .040" thick that fit on a standard 4-1/2" grinder. They cost under $3.00 and you can cut through that shaft a few times with one wheel. Don't force it, let the wheel do the cutting. The nice thing about an electric grinder compared to a 3" air powered cutoff wheel is that it has much more power and the power does not fade with the air pressure. Also you don't get water dripping out the tool after ~5 minutes as with an air unit.

Dave