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  1. #16
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    Quote Originally Posted by Kidbee View Post
    Is this business located overseas? What do they mean products by Amazon?
    Check the address on the front page - very local...

    "by amazon" is just a way of offering thru Amazon fulfilment - another delivery mechanism. Typically this means the seller ships a bunch of stock to an Amazon fulfilment centre and orders can be processed thru Amazon. But if you just click the top menu item for the item you want, you can add stuff to the "native" cart on the site.

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  3. #17
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    Quote Originally Posted by Kidbee View Post
    Yes, I can see the merit in both those suggestions.
    I have never been a believer in the notion that only rotating some rows extends the life of the inserts overall. Surely the newly rotated ones end up doing more work than the dulled ones, therfore blunting them quicker !
    I think this maybe a subject for Mythbusters.

  4. #18
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    And you can sharpen them once or twice on a diamond stone, although from what Derek says, as a hobbyist, you'd have to live a long time to make this necessary.
    Forum members PM me for a discount on all my products - https://www.ebay.com.au/str/aldavsstore

  5. #19
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    Strongly suggest Combined Saw & Knife. $55 for a box of 10 at those dimensions.

    Solid Tungsten Carbide TOK | Combined Saw and Knife

  6. #20
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    Ouch that's expensive! SJE are $39 for 10

    They also don't seem to have the radiused edge required...

  7. #21
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    Quote Originally Posted by elanjacobs View Post
    Ouch that's expensive! SJE are $39 for 10

    They also don't seem to have the radiused edge required...
    Makes sense - they appear to be an American company with a local importing arm. Combined Saw and Knife are an Australian company. I know which I'd rather support.

  8. #22
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    SJE is an Australian company

  9. #23
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    +1 for SJE Tools. I’ve done business with Steve a couple of times for replacement carbide heads for the CT330. Great quality - made all the difference.

    Brian

  10. #24
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    An Australian company that sells through Amazon and ships to Australia? Like a broker?

    #2legit2quit

  11. #25
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    Selling through Amazon means nothing, he certainly wasn't selling through there when I first bought from him. Believe what you want, there's plenty of us here who are happy to support him

  12. #26
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    The reason he sells through Amazon is because he has found it to be the easiest/cheapest way to access the American market. He also sells specialised router bits for guitar fret boards and neck profiles, they're made by Carbitool. He's Australian and based in Australia. If you have a look at his website - SJE-Tool - you'll see that his postal address is a PO box at Oxley in Brisbane. Maybe he flies from the US to collect his mail, but the last time I spoke with him he was in Australia.
    Forum members PM me for a discount on all my products - https://www.ebay.com.au/str/aldavsstore

  13. #27
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    crowie is offline Life's Good, Enjoy each new day & try to encourage
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    Another plus 1, I got them for the Byrd Shelix Cutterhead in my Dewalt DW735

    https://www.woodworkforums.com/members/27755-sje-tools

    SJE-Tool

    Steve gives, Great service, great price, great product

    sje@sje-tools.com

    cheers crowie

  14. #28
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    Thanks all for the kind words! 🙂

    I am certainly still around! Just to confirm yes I am local in Australia.

    As has been mentioned in I use Amazon as itís convenient for the US customers (there is a lot of guitar builders over stateside!) and the guitar fretboard radius router bits were my original product (amazingly way back in 2006!!!), also I got filling out the customs forms was sooooo time consuming!

    Just to clarify one thing though, my router bits are not made by Carbitool. I have now used the same manufacturer for all tools since 2012 - they are based in China.

    Cheers all!

    Steve

  15. #29
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    Quote Originally Posted by mark david View Post
    I have never been a believer in the notion that only rotating some rows extends the life of the inserts overall. Surely the newly rotated ones end up doing more work than the dulled ones, therfore blunting them quicker !
    I think this maybe a subject for Mythbusters.
    Couple of points:

    1) When you rotate them, you're not doing it because they are unable to cut, you're doing it because the surface finish is no longer acceptable. The inserts are still capable of cutting long after they've lost their nice sharp edge.
    2) The wear is on the order of hundredths of a mm; the fresh edges will not be doing significantly more work than the old ones, but they will stick out just that little bit further so they are the ones that determine the surface finish.

    Essentially, you're turning the head into a rougher/finisher


    It's not so much that the life of the individual inserts is extended, but the life is extended as a set because you can keep using dull inserts past their "use by" while still maintaining a good surface.

    I've got access to a nice inspection room at my new job, I'll see if I can have a measure of a new insert and an old one to find out just how much the dimensions change.

  16. #30
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    Inspection results are in and, as I suspected, the wear is about 3/5 of stuff all.

    Full disclaimer: I didn't have a new and "dead" insert from the same manufacturer to test, but the differences are that small that it's unlikely to make any meaningful difference. Measurement was done optically with back lighting on one of these: Micro-Vu Precision Measurement Equipment

    Nominal width over the 100mm radii is 15mm
    A new SJE insert measured 14.996mm
    A worn Byrd insert measured 14.977mm (using the every-2nd-row rotation system, with 3-4 months between rotations, in an industrial environment)

    So, we're on the order of 10 microns per edge.

    Measuring the edge wear radius was a bit tricky because the curved edge made proper focusing impossible, so I worked with the sharpest image I could get. I had to crank the magnification up to over 800x just to have enough space on the screen to place 3 points for a circle (that should give you an idea of how small we're talking), which came out at 7 microns radius.

    I know the radius and the linear measurements don't add up when you draw it in CAD, but that could be due to variation in the original size of the used insert from the nominal size, the inability of the optics to focus or a combination of both.

    Assuming the larger number of 10 microns per edge (~13 micron radius) of wear, on a 2" diameter cutterhead (the standard "lunchbox" benchtop thicknesser), with 5 degrees of back clearance, you're looking at about 8 microns difference in cutter projection. Moving up to a 120mm head on industrial machines, that number drops to under 5 microns.

    For scale, I just went and measured a single ply of 3-ply toilet paper and that's about 60 microns thick.

    So, no, I don't believe new edges stick out far enough to do more work than old ones and, yes, I'm sure.

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