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CBN raker wheel

Discussion in 'Chainsaws and Power Equipment' started by Screwloose, Aug 22, 2020.

  1. Screwloose

    Screwloose

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    20200822_134132.jpg 20200822_134739.jpg
    I bought this wheel on ebay and it took 94 days for an overseas trip. Runs super smooth, grinds great and has enough abrasive to last well beyond me. I feel bad that feedback time expired.
    Also it's made in lithonia not CHINA!!
     
    Last edited: Aug 22, 2020
  2. Ralphie Boy

    Ralphie Boy

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    I have a CBN wheel for my 3/8 x .50 Stihl chains on my Super Jolly and that thing is great! With that wheel, and with setup help from huskihl, my chains are throwing chips almost as big as if I were noodling. I hadn't thought about a CBN for the depth gauges... hmmmmm.
     
  3. Screwloose

    Screwloose

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    I loathe vitrified wheels and grinding tooling is a big part of my job so I was excited to find a 1/4" wide wheel to fit the Oregon style grinder.
     
  4. OldJack

    OldJack

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  5. Screwloose

    Screwloose

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  6. Chaz

    Chaz

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    :rofl: :lol:

    Looks like 3 grinders set up.
    Any particular reason?

    Different size chains?
     
  7. Screwloose

    Screwloose

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    .325" and smaller,.375" and larger and depth gauges.
     
  8. Firewood Bandit

    Firewood Bandit

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    Nice setup Screwloose .

    I too despise vitrified wheels. I like resinoid much better although they wear much faster and are dustier.

    For rakers I use a diamond to profile the 1/4" wheel so that it matches the profile factory rakers rather than a flat profile the stock 1/4 wheel will give.

    One tip, your grinders have a tremendous amount of travel to get to the cutting tooth. I tie a shoe string on them so the grinder head only has to move a little bit to make contact.

    I can't find a pic right now of the profiled wheel. The last 3 pics are a prototype Silvey style vice rather than the clamp from the bottom Oregon style. DSCF0012.JPG DSCF0014.JPG DSCF0013.JPG DSCF0015.JPG DSCF0016.JPG DSC00024.JPG
     
  9. Mag Craft

    Mag Craft

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    Yep I do the same. I have a wheel that is profiled to the shape of the raker and that is all it gets used for.
     
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  10. Screwloose

    Screwloose

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    I do the same thing as far as limiting the amount the grinder rises above the tooth. As far as the raker wheel it is a 1/4" wide but also has 1/4" of resin bonded CBN abrasive that I am able to dress into any profile I desire. Sometimes it is nice being in a machine shop. I have always profiled my depth gauges but now do to the popularity of that new 2 in 1 filing guide that just uses a flat file I'm wondering if just following the angle of the mark on the gauge is satisfactory. I mean if the leading edge of the depth gauge is below the the bottom of the kerf what difference does it really make ? I will experiment before I mess with the wheel. Also since these are at home it does a awesome job on freehand drill bits ect.
     
  11. Firewood Bandit

    Firewood Bandit

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    You are correct in that the highest point, (rather than leading edge which may or may not be the highest point) ultimately determines the amount of bite the working corner of the chain is going to take. IMHO, a flat file raker will not be as smooth as one that is rounded like the OEM profile. The important thing is the amount of degrees from the working corner to the top of the depth gauge must be maintained. i.e. as the chain is ground more, the absolute distance from the top of the raker to the depth gauge must increase. Just my two cents.
     
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  12. Screwloose

    Screwloose

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    I agree. But the front of the gauges are radiused anyway so no matter what you don't end up getting a blunt edge. For now I will experiment with the head tilted at 10° and the wheel still square. Pretty much in line with the mark on the gauge.
     
  13. jo191145

    jo191145

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  14. Screwloose

    Screwloose

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  15. jo191145

    jo191145

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    Straight but I’ll agree profiling would be better. My chains can run a little rough but I’m not sure if that’s an aggressive grind angle, flat profile rakers or too deep of rakers. I’ve had all those issues :)
     
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