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Self Sharpening SDS Bits

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  • #97861
    mattryyc
    Pro
    Calgary, Alberta

    In another thread we were discussing the self sharpening SDS-Plus bits. None of us really were able to find any information on how they work. Assuming it’s not proprietary information, can @boschtoolsservice tell us a bit about how they work?

    Here’s an example of one I have:
    https://www.boschtools.com/Products/Accessories/Pages/BoschAccessoryDetail.aspx?pid=HS1427

    Does the blade actually get sharper as you use it?

    Will it take some time to get sharp, or will it just maintain the level of sharpness as you use it from new?

    #97960
    theamcguy
    Pro
    Fayetteville, NC

    Interesting idea, but kind of negates purchasing new ones. Waiting for more info but my curiosity is piqued.

    Automotive Pro
    Fayetteville, NC
    (and also the World's Fastest Poster)

    #98014
    Anonymous
    Inactive

    Well it does say self sharpening but that doesn’t mean the more you use it the sharper it gets……..Does it?? Is yours sharp now?

    #98083
    MKE_Voltage
    Moderator
    Saint Francis, WI

    What do you think about the theory that the tip is super hardened and the rest is softer steel so that it always sharpens the angle when the softer steel it worn down and the hard tip remains?

    #98084
    Moze
    Moderator
    Dallas, TX

    Pretty interesting. I’d be curious to hear how that works as well.

    Resident Sign Guy

    #98234
    MRenes
    Pro
    Vienna, Missouri

    That is pretty neat, I wonder as well if it is what they say it is.

    #98260
    mattryyc
    Pro
    Calgary, Alberta

    I like Jason’s theory. They have remained very sharp for me, more than anything I am just curious to hear more about exactly how they work.

    #98825

    In another thread we were discussing the self sharpening SDS-Plus bits. None of us really were able to find any information on how they work. Assuming it’s not proprietary information, can @boschtoolsservice tell us a bit about how they work?

    Its all in the edge. The design of the edge along with breaking the concrete will sharpened that edge as you use the bit. This will eliminate downtime and increase removal rate.

    #98828

    Will it take some time to get sharp, or will it just maintain the level of sharpness as you use it from new?

    The bit is sharp and ready for chiselling right from the moment you purchase it. The self sharpening aspect will help maintain that level of sharpness over time.

    #98831
    svensshutters
    Pro
    Colorado Springs, CO

    That is interesting, I have never seen a self sharpening bit before. What do you chisel with that?

    #98839
    Anonymous
    Inactive

    Hey cool, the CS guy jumped in again. This is such a nice feature as now we don’t have to guess about stuff. Thanks CS

    #98861
    mattryyc
    Pro
    Calgary, Alberta

    Its all in the edge. The design of the edge along with breaking the concrete will sharpened that edge as you use the bit. This will eliminate downtime and increase removal rate.

    The bit is sharp and ready for chiselling right from the moment you purchase it. The self sharpening aspect will help maintain that level of sharpness over time.

    Thanks for the reply! Makes sense, I guess the density of the concrete combined with the angle of the blade makes the concrete act like a sharpening stone.

    That is interesting, I have never seen a self sharpening bit before. What do you chisel with that?

    I use it for prying a lot and demo – not much concrete, but the chisels are rated for use on concrete.

    #98960
    MKE_Voltage
    Moderator
    Saint Francis, WI

    Thanks Bosch CS. I guess all of our theories are out the window and the truth comes out. I guess the angle of the tip is the secret. Will I ever truly understand it, probably not, but thats what engineers are for.

    #99013
    kurt@welkerhomes.com
    Moderator
    Owatonna, MN - Minnesota

    Thanks Bosch, Are all Bosch concrete bits self sharpening or just some.

    #99024
    jdw1865
    Pro
    Dewey, OK

    The hard and soft parts of the edge wearing at different rates to keep it sharp is the same way beavers, rats, squirrels, and most other rodents keep their teeth sharp. The front is hard and the back is soft as as the tooth wears it keeps the right angle to be sharp.

    #99028
    jim_hunt17
    Pro
    Milwaukee, WI

    This was a useful thread. Thanks for the the beaver info Jerry. I will for surely be purchasing some of these bits

    Jim H.
    Milwaukee, WI

    #423184
    Doobie
    Moderator

    This sheds some light on self sharpening blades somewhat for those who may be interested in reading further.

    http://www.google.com/patents/US6105261

    Edit: Oops! Kinda put this in the wrong thread.

    Meant to put it in this newer one on the same subject….

    http://bethepro.com/forums/topic/self-sharpening-sds-chisel/

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