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Thread: 8" Bench grinder advice

  1. #1
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    8" Bench grinder advice

    Looking to pick up an 8" bench grinder. Any advice /warnings as to what to get or look for?
    Daily Thought: SOME PEOPLE ARE LIKE SLINKIES..... NOT REALLY GOOD FOR ANYTHING BUT THEY BRING A SMILE TO YOUR FACE WHEN PUSHED DOWN THE STAIRS...............

  2. #2
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    .........
    Last edited by larry merlau; 12-12-2009 at 07:01 PM. Reason: mis information!!
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  3. #3
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    I've heard the arguments for the 6", but I don't buy them, as your wheel will soon be under 6", I vote for the 8" slow speed, and the Oneway balancing system is a must, as well as better wheels than what come with most cheap 8" grinders.

    If you can swing it, an 8" slow speed Baldor grinder is the way to go, but they are not cheap, they are good.

    Cheers!
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
    William Arthur Ward

  4. #4
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    I have seen it argued, and I agree, that a mimimal amount of hollowing is best for WW tools. I needed a couple new wheels for an old motor I used for sharpening. But, I saw the WoodCraft 8" slow on sale for $99.00 and got it. Great item and same money as two wheels by themselves. Some say fast is cooler. I can't fathom the reasoning and go with slow.
    http://www.woodcraft.com/Product/200...d-Grinder.aspx
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  5. #5
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    The conventional wisdom is to go with an eight inch. Stu is right. The wheels will soon be less. Nearly every accomplished turner I have ever hear speak on the issue, recommends an 8 inch. I am learning that sharpening is a finesse thing. A light touch, but often. A consistent grind for consistent results. And a really, really sharp edge. Like Stu's day with Garrett Hack and what he learned about the sharpness of hand planes. Same applies to turning tools.

    Not to steal your thread, but yesterday I picked up an 8" slow speed grinder at Woodcraft for $110 and an 8" diamond wheel for way more than that. I am trying to learn how to do the elegant finals that Cindy Drozda does. The crisp details and the eighth inch (or less) of the stems take a very light touch to remove material or they break. That calls for a very sharp tool. Along with my Wolverine, my 'sharpening station' is now worth more than my mini lathe! I had been using a 6 inch high speed grinder. I put 8" wheels on it but thet meant removing the wheel guards. That always bothered me. SO that grind will be restored to its 6" configuration and use for 'rough' grinding. In fact, one side will get a steel brush. Always found that useful for removing a bit of rust while buffing my fingernails!

  6. #6
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    ........
    Last edited by larry merlau; 12-12-2009 at 07:02 PM. Reason: mis information.!
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

  7. #7
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    Quote Originally Posted by larry merlau View Post
    i wasnt sayun i was right just what i had seen here and i also mentioned that the turners had other thoughts and 8" was a slow speed prefernce.... now what is this one way balancing system??? sorry for stepping on your toes should have consulted first..or asked permission.
    I am not saying you were wrong, sorry if it came across that way, no permission needed, no toes stepped on, nor any consultation necessary, you were passing along info, which is what makes this place go round, thanks for that

    I was offering up what works for me and my opinion, I'm not saying I'm any more "right" than you or anyone else

    I do know some pro turners who like the 6" wheels and some even like the 7" wheels. OneWay suggests that their tools be sharpened by the higher speed grinders, that the slow ones are not needed

    I think the main thing is to get a system set up that works for you and to use it.

    Carol, I'd be interested in hearing about the diamond stone, they are pricey for sure, but they certainly do look interesting.

    Cheers!
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
    William Arthur Ward

  8. #8
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    Stu, I'll report more after I have it set up and have used it a bit.

  9. #9
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    I'm voting 8" MINIMUM, preferably larger. If 8", HIGH speed because steel likes to be ground at high speed better than it likes to be ground at low speed, and the higher the speed the finer the "effective grit" of the wheel (you can use a coarser wheel to get a finer finish).

    More skill is involved when you use a high-speed wheel, though, at least for carbon-steel tooling. HSS can't get burned by grinder temperatures, but it can get hot enough to hurt your pinkies. A fine, light, feathery touch is called for, along with cooling-off pauses to keep from getting the tool blazing hot. DO NOT QUENCH ANY TOOL STEEL, especially HSS! Quenching, especially in water, makes tiny surface cracks that cost you your edge. Just let it air-cool until it's comfortable to handle - only takes a moment.
    -- Tim --

  10. #10
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    Quote Originally Posted by larry merlau View Post
    i ran a poll some tie back drew and the concense was to get a 6" rather than a 8" and slow speed was there choice for a 8" the 6" has a more curvature which develops a better bevel on flat edges and the turnes well i dont know there desires other than a wolverine jig for your grinder to get your lathe tools sharpened right.
    Larry, I really hate disagreeing with ye. Your recollection puzzled me so I looked it up.
    Seems the preference runs to 8" and slow.
    We will never git 100% agreement on anything, everyone will agree to that.
    Personally, I prefer the 8" and slow with a 120 grit.
    http://familywoodworking.org/forums/...ad.php?t=12084
    "Folks is funny critters."

    Think for yourselves and let others enjoy the privilege to do so, too. ~Voltaire

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