Engine Debur
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Engine Debur

  1. #1
    I'm No Expert Shaun's Avatar
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    Default Engine Debur

    I want to cleanup/debur my block. Basically do what scott (steelcomp) does to his. What type of bits do you use to do the work? I have a few that came with my die grinder, couple dark poris ones, few pink ones, couple white ones.

    I just want to get the right tool for the job..

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    Choking my ....... beerjet's Avatar
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    Those colored ones arent gonna do dick.
    Get some of these .



    They are carbide and a little spendy. If you buy good ones, you'll never regret it.
    Last edited by beerjet; 02-27-2009 at 02:29 PM.
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    Some guy obnoxious001's Avatar
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    Actually, the grey stones do pretty well.

    I use a 4 1/2" disc grinder to get the flashing down close to the block, being careful not to miss or angle and scar the block. Then the rotary grinder with a cone shaped grey stone, and then finally with cartridge rolls to make a smooth blend. Same with in the valley, the cone shaped stone, and then cartridge rolls.

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    Mcfadden Dale or CTI abrasives. but beware of CTI, I go nuts when I go in there. They have absolutely everything you could ever want.
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    "The" masheenist wsuwrhr's Avatar
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    In my opinion, get High Speed Steel burr tools, cheaper too, carbide (cutting steel)will eat shit in the hands of an inexperienced operator.

    Finer the "tooth," called "double cut," the better.

    Not trying to discount anyone's advice, just giving my opinion.

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    Member Weaverman's Avatar
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    IMO, high speed steel will work just fine on cast iron. I agree...one slip with a kick-ass carbide tool and you could be sorry! No forgiveness in those babies. They are definitely the $hit in experienced hands though. Be sure to keep the cutter "loaded" or it will overheat and wear quickly, and some lubricant won't hurt a thing. Whatever you use, the block goes to the tank for flushing afterward!!

  9. #7
    steelcomp was here
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    Quote Originally Posted by beerjet View Post
    Those colored ones arent gonna do dick.
    Get some of these .



    They are carbide and a little spendy. If you buy good ones, you'll never regret it.
    Those are single cut burrs and meant for aluminum. I have used them on iron before, but it's not what they were made for. Stones will work, but are a little slow and they wear out fast. High speed steel will last about 10 minutes on cast iron with no experience. If you run an electric die grinder, you can use something to control the speed and they'll last a little longer, but in an air die grinder, it's almost guaranteed you'll spin them too fast and burn 'em up. Carbide is really the only way to go for iron. Very important...watch your eyes!!!!! I can't stress that enough! I wear safety glasses and a face shield, and have still gotten pieces in my eyes. When that burr is turning 15000 rpm, those litle iron chips are really flying and will bounce off your cheek and right under a pair of glasses, right into your eye. Goggles work, but I've even got shit in my eyes with goggles.
    I usually go over everything with the carbide, then a cartrtidge roll to blend things in. Standard Abrasives is who I use for abrasive materials.
    Here's a little of my arsenal for iron. (The large single cut oval is for alum.)



    Last edited by scott foxwell; 02-27-2009 at 06:46 PM.
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    Senior Member wagspe208's Avatar
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    I also start with the 4 1/2 angle grinder. Much faster to get the big crap knocked off. Mostly on the outside of the casting. Then go with an electric grinder and carbide. Finish with 80g sanding cartridge on air grinder.
    Looks nice, fast, easy.
    Air grinder with carbide is next best method. Then so sanding cartridge.
    A good electric grinder that spins reasonable rpms is 400 or so. Not cost effective for one or two blocks.
    Air will work great, just take a little longer.
    Wags

  11. #9
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by steelcomp View Post
    Very important...watch your eyes!!!!! I can't stress that enough! I wear safety glasses and a face shield, and have still gotten pieces in my eyes. When that burr is turning 15000 rpm, those litle iron chips are really flying and will bounce off your cheek and right under a pair of glasses, right into your eye. Goggles work, but I've even got shit in my eyes with goggles.
    Great advice. I am still bad about that sometimes.

    I still say that for a guy like Shaun doing a one time deal, use the stones. I personally never use cutters on blocks, only if I do head work. If you have a disc grinder to rough it down, probably only takes an hour to do the block. You don't have to follow up with cartridge rolls either, paint will cover most of the scratches and stuff.

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    Big fan of the carbides! Catrigde rolls after that. adjustable speed regulation for the die grinder. Start at a slow rpm and adjust regulator up to find the sweet spot for the given bit. The goal is no bit chatter and smooth cutting. This is just what works for me and I spend ALOT of time behind the grinder. Good burrs are exspensive but well worth it. Don't even bother with the auto parts house junk you will be unhappy with them imho

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    Senior Member hotbo's Avatar
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    i use carbides alsothen cartridge rolls,works great,but like scott said be careful of the eyes

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    Quote Originally Posted by hotbo View Post
    i use carbides alsothen cartridge rolls,works great,but like scott said be careful of the eyes
    Also,
    a good face mask is a must.That cast grinding dust is nasty.


    Shaun,
    are you wanting deburr the outside or inside of the block?I did my block and heads..I have 15-20 hrs in the block alone...heads 10-15 hrs. apiece on the cyl. heads.It came out tits.
    A four in. grinder w/flapper on for the heavy.Get yourself a bunch of scothbrite twist pads.The brown,red and blue ones.Try to hold the wheels flat to prevent "divots".Then a shit load of the tapered and barrel cartridges.Beer helps......

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    Quote Originally Posted by flatrat View Post
    Also,
    a good face mask is a must.That cast grinding dust is nasty

    ......
    Yep, first thing it does after it gets in your lungs, IS RUST! Nasty, nasty chit!



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    PLEASE!!!!!! If you are unfortunate enough to get metal in your eye go directly to an Opthomologist, period. Do not let any other kind of other doctor (ER, general MD) touch youe eye......only the guy that is an EYE DOCTOR.

    I would not want to wish on anyone what an ER MD did to my eye trying to find and remove a metal sliver. All OK now but a very painfull and shitty aftermath.

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