Dec3 Contest ~ Project 1 ~ From I Love Plasma Wear Pad Over-Haul

[DaveO]

Is this the equivalent of a skid shoe? I'm curious to know how much you saved with a refit vs. buying a replacement.

[I_Love_Plasma]

Yep you are correct. I have only heard them called wear pads, but after Googling skid shoe ... Any way, I used 23 rods and piece of scrap that had paid for itself at least once before. The rods cost about $4.14. I just searched Ebay and found a decent cheap set that would be a direct fit. They were $19.95 + S&H (Each, not pairs, and no combined shipping; from a quick search). Savings look to be about 75-80% of new.

Great question, glad you brought it up,
ILP

[DaveO]

LOL, I googled "wear pads" and got nuthin. Let's see, saved 75%, did it yourself, didn't have to wait for shipping, experience to do it again in another application next time... sounds good all around.

[I_Love_Plasma]

ha ha yep Experience is the biggest part for me. But then again even Jody does practice pieces. Yeah skid shoe's are something that you can just keep over hauling if you watch to see how worn they are getting. Just add some more weld or if it's got heavy wear throw a piece of scrap steel on the bottom and weld it in.

Thanks,
ILP

[I_Love_Plasma]

Correctly to temper a detail it is necessary to know mark of a steel .
Some marks of a steel are quenching in water some in oil and is obligatory with the subsequent stress relieving

So what would you do for cold rolled steel? We grade it as A-36, I do not know how they would grade it over there

He explained that he always used old used motor oil for this purpose because the carbon in the oil from the byproducts of combustion helped in the hardening process. He also said his "secret" ingredient that he added to the oil was saltpeter (potassium nitrate). He claimed that this gave the steel a superior quality.

HAHAHAHAHA WOW! Heck of goodness, potassium nitrate is a powerful oxidizer. If he had tried ammonium nitrate in his oil, he would have been long dead before you met him. That mix would have exploded similar to the Oklahoma City freakola bomb; I still hate that guy.

But thanks for the reply, if carbon helps with the hardening, maybe use, used diesel engine oil (with potassium nitrate added)? Do you know how much potassium nitrate he stuck in his oil per gallon?

Thanks Gabe for your reply.

ILP

[donor76]

[QUOTE=I_Love_Plasma;21626]So what would you do for cold rolled steel? We grade it as A-36, I do not know how they would grade it over there

At our countries different classifications of a steel, therefore to me it is difficult that or to advise. I can tell one: if А-36 that concerns low carbonaceous steels I am afraid of it will not temper, but give durabilities can ,,cementation,,

[67cudafb]

I thought A-36 was hot rolled steel?

[Joe from NY]

If he had tried ammonium nitrate in his oil, he would have been long dead before you met him. That mix would have exploded similar to the Oklahoma City freakola bomb; I still hate that guy.

But thanks for the reply, if carbon helps with the hardening, maybe use, used diesel engine oil (with potassium nitrate added)? Do you know how much potassium nitrate he stuck in his oil per gallon?

ILP

No, sorry. i found alot of references to the process on google, but none i saw gave percentages. there was a discussion on this on the practical machinist website a bit back.