![]() Bring it to non-magnetic and quench in warmed oil. You can heat treat in a charcoal fire with just a little added air blast. Just don't use motor oil, it's nasty stuff. just of new canola oil for not a whole lot. Some markets change on a scheduled basis and the folk buying the used oil aren't likely to miss a few gallons. They change oil regularly and I ask ahead of time then I bring a clean plastic jug with a label and check back when they say the job'll be done. I bum a jug of used fryer oil from the deli section of the local Safeway when I need fresh. Don't use motor oil, the smoke's too toxic, besides the petroleum smoke there are all the metal residues antifreeze and combustion products that blow by the rings. Heat treating coil spring is pretty easy, it's pretty forgiving of mistakes. Yeah, coil spring, Ideas to mount it are starting to perk. Heck I'd put chain link to help carry and smooth the material that's scraped off the high spots in the low spots. Heck if it's not too hard a road you can drag a piece of chain link fence and it'll smooth things up nicely. I'm thinking the teeth are shorter than the angle iron is wide but I'm trying to picturing the one I looked at a couple years ago. ![]() Angle iron flange up and forward with the teeth, scarifiers I suppose, extending downwards. I'll have to think about how I'd connect them to the grader frame. The expensive factory made units use carbide drill teeth they look like large square lathe cutters. Oh yeah, coil spring should work a treat, you don't really need sharp to break up the washboard, it helps but what works better is if they chatter in the frame. You don't have the equipment to heat treat it, we're talking ramping kiln type precision.Ĭoil spring was what came to mind when you said you wanted to make a road harrow. If it's like we used on State Highway plow trucks it'd be okay but a serious bear to get shaped and heat treated. It'd depend on what kind of snow plow cutting edge you were thinking of. There is very little heat treating can do for a spike except relieve work hardening, normalize or anneal. You do NOT want RR spikes to work harden and snap. They need to be tough, take millions of cycles of stretch relax forces without becoming brittle. I'm afraid RR spikes are at the high end of low carbon steel. If you'll put your general location in the header you might be surprised how many of the gang live within visiting distance. Welcome aboard Turbo Dog, glad to have you.
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