|
|
I have an old boxblade that I use on a 35hp tractor. It has 7 shanks, and each shank has tooth on the tip. The tips were probably square when it was now, but now they are pretty much worn off and look oval. I cut some playing card sized pieces of 3/8" x 2" flat iron to weld onto the face of the teeth.My questions are this:Is the orignal tooth made from hardened steel? If so, do I need to preheat it before welding? I'm using .035 solid wire from a HH 187 with C25 gas to weld them on.90% of my digging is in hard packed soil, the other 10% might be in rocky shale soil. I thought about hardfacing the pieces that I'm welding onto the teeth. I can't find any hardfacing wire in a 2lb spool, the smallest quantity is 25 lbs. The welding shop suggested 308L stainless wire, even though I was using c25. I went ahead and bought the SS wire, and it seems to weld fine for my purposes onto the pieces that I'd weld onto the teeth. I planned on putting a bead of SS along the 4 edges of the face of each tooth. Does this seem like a good idea?
Reply:The preheat is probably not a bad idea, especially if the machine is sitting outside in the cold right now. Honestly usually bucket teeth are not worth the time and effort usually to repair unless they are quite large. Also usually by the time most people even think about a repair, it's gone well past the point where it's cost effective to do so. You want to wear face usually before the tooth gets rounded not afterwords. Mild steel is usually also a poor choice for adding to teeth. It just wears too fast. Abrasion resistant steels usually are too expensive in small pieces unless you have an old cutting edge you plan to cut up and use.Since the teeth are shot anyways, you really won't hurt them playing. You might get lucky and get a bit more use out of them. I think in the long run when you add up the cost of the wire, gas and the time spent, you'll find that just replacing the teeth is more cost effective when they are badly worn. As far as hard face, stick would probably be a better choice. You can usually get small quantities of hard face rod and if you run a few beads as soon as you start to see wear you can usually extend the life somewhat..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:Most teeth can be turned over when the bottom starts getting thin. I agree w/ DSW, just get some new ones and watch the wear on them. The bottom usually gets the most wear, so when it's time, just turn them over and get about twice the life out of them. We always figured to let them wear down to a little less than 1/2 the new thickness. If you wear them down too far then there's a chance it might break out and then you have a loose tooth to worry about puncturing a tire. MikeOl' Stonebreaker "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw |
|
发表于 2021-9-1 00:37:34