Need some input - BURNING TIPS like MAD!!

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I guess I should say.... I am burning up my FLUX CORE NOZZLES LIKE MAD!I have a Hobart 187.  I am using Hobart flux core wire.  .30.I have installed a flux core nozzle.  I have some questions though.  I am burning up nozzles like crazy.  When you install the flux core nozzle..... you remove the normal MIG tip right?  Or do you keep the tip on under the nozzle?Seems no matter what I do.... I am burning up the nozzles.  As long as I can keep the wire coming out the nozzle I do ok.  But it seems the nozzle just gets fouled and the wire gets snagged and nozzle fries.Any input is greatly appreciated.  I am new to welding.Thanks!Last edited by cybordolphin; 12-07-2010 at 04:40 PM.
Reply:yeah the Tip stays.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:if your wire speed is a little too slow you will burn up tips like crazy... that's the first sign of wire speed being too slow...miller 330a bp TIGmiller dynasty 200DX TIGmillermatic 185 MIGthermal dynamics cutmaster 101 plasma cuttersnap-on YA5550 plasma cutterhypertherm powermax 30 plasma cutterbaileigh CS225 cold sawetc....
Reply:Originally Posted by turbocad6if your wire speed is a little too slow you will burn up tips like crazy... that's the first sign of wire speed being too slow...
Reply:You really don't even need a nozzle - just a tip.
Reply:Cybordolphin,You use the same Tip for Fluxcore and Solid Wire.The Fluxcore Nozzle is used to protect the Tip Adapter from getting clogged up with Spatter.Ed Conleyhttp://www.screamingbroccoli.com/MM252MM211 (Sold)Passport Plus & Spool gunLincoln SP135 Plus- (Gone to a good home)Klutch 120v Plasma cutterSO 2020 benderBeer in the fridge
Reply:Like Broc says, nozzles and tips are two different issues. You need a tip no matter what mode of operation you run in. Look at the manual and get familiar with the parts and terminolgy for each part."The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:Well that likely explains it.  I will use the .30 tip (match wire), and the flux core nozzle combined with a tip.  Thanks for the HU!Last edited by cybordolphin; 12-07-2010 at 10:47 PM.
Reply:the wire melts by completing an electrical circuit to the grounded part your welding. the only part of the whole wire run that you want short circuiting and melting is whatever wire is sticking out past the tip. the tip is the "brush" that provides the voltage to the wire. without a tip the wire is getting power from further upstream & the wire is short circuiting to further upstream.., probably to the liner or the gun itself... not good, you need a tip  if your tip burns up or sticks & jambs THEN you'd need more wire speed miller 330a bp TIGmiller dynasty 200DX TIGmillermatic 185 MIGthermal dynamics cutmaster 101 plasma cuttersnap-on YA5550 plasma cutterhypertherm powermax 30 plasma cutterbaileigh CS225 cold sawetc....
Reply:Makes sense.  Do you spose I caused damage to the liner?  I installed a tip after some cleaning, and the wire seems to feed fine.  I will do some welding again tomorrow.Thanks for the rather input..... as I know this probably makes me look like a complete tard.... and you guys/gals could have been alot less kind in your responses!
Reply:throw the nozzle awaay you dont need it  with fluxcore..
Reply:Ya forget the nozzle, thats the coolest thing about flux core IMO at least, being able to see the puddle and arc so much better, but it makes it annoying to go back to using a shielding gas with a nozzle.
Reply:ok..... so what does the nozzle provide?  Does it somehow keep you from sticking your wire to the tip?
Reply:Originally Posted by cybordolphinok..... so what does the nozzle provide?  Does it somehow keep you from sticking your wire to the tip?
Reply:Hey guys,This is for the newbies & youngsters who don't want to do any homework, take a class, or read a manual. Flux-core welding is no different that solid other than the use of a shielding gas for solid. Since no gas is needed with f/c, if your welder is set up for both options, you need to be concerned with the gas ports on the MIG gun getting clogged with spatter. F/C nozzles are made to shield internally the gas ports & have a minimal opening for the tip. Since I have a lathe, I make my own from aluminum solid stock. The spatter also comes off aluminum quite easily with my nozzle brush. I like to have the tip protrude about a half-inch to make it easier in tight areas such as an inside corner. Here's a pic of the nozzles I make & use on my units.Denny Attached ImagesComplete Welding/Machine/Fab. ShopMobile UnitFinally retired*Moderator*"A man's word is his honor...without honor there is nothing.""Words are like bullets.... Once they leave your muzzle, you cannot get them back."
Reply:just use some duct tape, its easier
Reply:sounds like you are running too hot, cut back on your heat and increase your wire speed a bit.
Reply:Yorkiepap....  how much for say 3-4 of those? If you are not up for selling a few..... if you don't mind my asking..... what did you use for the blank/stock?  Where did you get it?
Reply:Be sure and have plenty of wire sticking out past the end of the contact tip or it will burn back to the tip in a hurray.
Reply:Hey cybordolphin,Each one I made was fitted to the MIG gun I am using since there are some dimensional differences with each. Tomorrow, I will take some measurements & close-up pics so you & others can see how I bored the insides. They are quite easy to make & if you don't have a lathe, maybe you can find someone near your home to make them for you.DennyComplete Welding/Machine/Fab. ShopMobile UnitFinally retired*Moderator*"A man's word is his honor...without honor there is nothing.""Words are like bullets.... Once they leave your muzzle, you cannot get them back."
Reply:I think you may have found a new lil business once you retire?   Heck..... you could even anodize them for the color coordinated welders out there (lmao).I'd rather have those than the glass impregnated, plastic, overpriced, dare I say junk.... that is available out there.Wondering if I drilled out and threaded a little of the inside (to cut off later) of an aluminum bar, and fashioned a blade to my drill press... if I could turn my drill press into a mini lathe of sorts, and turn down the mouth/opening into a cone shape.Last edited by cybordolphin; 12-08-2010 at 08:50 PM.
Reply:I remember a guy who had turned his drill press into a lathe.  Can't remember exactly how he did it.  For aluminum and soft metals..... might be safe.