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  1. #1
    Join Date
    Oct 2012
    Location
    Brisbane
    Posts
    29

    Default Question regarding arbors, bushings and blades.

    Hi forum readers,

    This more than likely has been asked before but I have a question about arbors, bushings, and blades.

    I purchased a Carbatec TS-C250P table saw. Specs are 5/8 arbor (15.875mm) with required blade body thickness of 1.6 to 2.2mm, and required blade kerf thickness of 2.6 to 3.2mm

    If an arbor is advertised as 5/8 (15.875) why do 5/8 advertised bore blades appear almost non-existent?. Every search appears to be in mm. 16mm, 20m 25mm, 30mm etc. In this case is 16mm the right blade to get (only being .125 of a mm out) or should one find an actual XXmm (choose your own bore) to 5/8 bushing.

    Could it be that we in Australia are using less imperial measurements, moving fully towards metric, and that they are just rounding up the 5/8 (15.875) to 16mm (but still meaning 5/8)?

    Also, should the bushing be exact width of the blade (not the kerf as the blade tips can be wider), or can they be a touch thinner, i.e. 2mm thick bushing for 2.2mm thick blade?

    Maybe I am a bit over-exacting in things. Probably why I take 4 times as long to complete projects as I am too fussy on these sorts of details.

    Any help in regard to these questions above will be greatly appreciated.

    Cheers,

    Ashley

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  3. #2
    Join Date
    Apr 2014
    Location
    Little River
    Age
    73
    Posts
    820

    Default

    I think that you will find that the blades/bushings that are labelled 16 mm in AU are in fact 5/8" bore made for the US market.

    AU laws require the labelling of product for sale to be metric so you won't find any 5/8" blades/bushings.

    I think that the 16 mm blades/bushings will fit perfectly.

    The thickness of a bushing is not critical as the blade is held by the flanges and the bushing only centres the blade, as long as the bushing does not stop the flanges from clamping the blade.

  4. #3
    Join Date
    Aug 2016
    Location
    FNQ
    Posts
    20

    Default

    I own one these saws, it's my understanding that you need to use full kerf ( 3.2mm ) blades with the two supplied riving knives, otherwise you risk a dangerous binding/kickback scenario.
    Carbatec don't seem to sell the thin kerf riving knives , I think you can get them from Grizzly in the states.
    I've only used blades labelled with 5/8 arbors so can't help on that.

  5. #4
    Join Date
    Jul 2015
    Location
    Hunter Valley
    Age
    51
    Posts
    797

    Default

    Most saws sold in the US will use a 5/8" arbor. More commonly, saws sold in AU (with the exception of Saw Stop) use a 30mm arbor.

    As a result, most of the blades sold here for these saw types will have a 30mm arbor.

    To solve that, you buy the 30mm blade you want, plus one of these: Reducing Bush 30mm to 5/8" | Accessories - Carbatec

    You hammer that reducer in to your 30mm blade and leave it on permanently.

    Voila, you have a 5/8" arbor on your 30mm arbor blade.

  6. #5
    Join Date
    Jan 2009
    Location
    Adelaide
    Posts
    28

    Default

    I bought a TS-C250P as well and replaced the rip blade with a 60T CMT from Carbatec. I also bought the appropriate bushing but soon noticed that the rip blade provided with the saw had a 30mm bore and as such a 30mm to 5/8" bushing... now I have 2.

  7. #6
    Join Date
    Oct 2012
    Location
    Brisbane
    Posts
    29

    Default

    Hi Bohdan, barramonday, Midnight Man, and Samo. Thank you for your replies. Feeling better educated now.

    I coincidentally found a 30mm to 5/8 bushing in one of the boxes this afternoon (after believing I completed putting the saw together yesterday afternoon). If didn't appear to be on the inventory so was pleasantly surprised to find it. Didn't find a rip blade but no matter. Will lash out tomorrow for a few different 30mm blades.

    I looked at the riving knives and both are stamped as .1" thickness (2.54mm). I read that the riving knifes should be thicker than the body of the blade but thinner than the teeth so I believe that as long as the body of the blade is 2.53mm or thinner and the teeth 2.55mm or wider I should be on the right track.

    Thank you again all,

    Ashley

  8. #7
    Join Date
    Jan 2009
    Location
    Adelaide
    Posts
    28

    Default

    The thin kerf CMT blade I bought probably is a little too thin for the provided riving knives but so far I have not had any issues. In any event I was going to buy an 80T blade and put the 60T CMT onto the mitre saw.. pending it's suitability.

    Thin kerf riving knives are available through Grizzly direct for about US$30 but they dont ship these to Aus. You could use a mail forwarding service which would be easy enough but I suspect you wouldnt see much change from $100 by the time it lands at your front door.

  9. #8
    Join Date
    Oct 2012
    Location
    Brisbane
    Posts
    29

    Default

    Hi Samo,

    I might be lucky in regard to getting riving knives. I have a brother living close by with all sorts of metal fabrication gear (cutters, folders/presses, milling machines, etc), so can get him to knock up copies with different thicknesses if I'm after something particular.

    Ashley

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