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Thread: Bench grinder

  1. #1
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    Default Bench grinder

    I would like a bench grinder to sharpen chisel, plane blade, drill bits.

    The wet stone slow speed grinders seem to be good and Timbecon + H&F have them at affordable prices - but they cant sharpen drill bits.

    Should I get an 8" grinder with CBN wheel one side for the blades and another type of wheel for the drill bits?

    Would be great if someone can point me in the right direction

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  3. #2
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    Forget he wet grinders and buy a bench grinder with a CBN wheel(s). Much much faster. Have a look here https://www.inthewoodshop.com/Woodwo...ningSetUp.html
    CHRIS

  4. #3
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    Default

    Lot of folks here seem to recommend the Drill Doctor for drill bits.

    I haven't used one myself, but as an owner of the Tormek T8, I've been figuring out whether to buy their drill bit attachment (https://www.justtools.com.au/tormek-...arpener-dbs-22 - $449 - Ouch!), or a Drill Doctor (https://www.totaltools.com.au/brands/drill-doctor - No more expensive, some cheaper options - Still Ouch).

    I'm sorry I can't make a recommendation for you, but perhaps the info on the Drill Doctor will let you research that option too.

  5. #4
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    It seems that neither the tormek or the drill dr does brad point bits?

    How much power should one look for in a grinder? These suitable?
    https://www.totaltools.com.au/power-...inder-sabbr750
    https://www.machineryhouse.com.au/G159

    https://www.cwsonline.com.au/shop/it...m-x-40mm-x-80g
    Can this wheel also do drill bits? With the corner of the wheel like this:
    https://www.youtube.com/watch?v=VcwOBL0tTbc

    Or should I just get a white stone for drill bit for the other side

  6. #5
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    I would go for your preferred method of sharpening chisels etc if that is a wet stone and get an elcheapo little grinder from one of the big retailers to do drill bits etc.

  7. #6
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    Quote Originally Posted by Beardy View Post
    I would go for your preferred method of sharpening chisels etc if that is a wet stone and get an elcheapo little grinder from one of the big retailers to do drill bits etc.
    Its more to get the initial hollow bevel, then stones afterwards. I would prefer a single grinder if possible just to cut down on space requirements

  8. #7
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    I use my CBN wheel for just about everything including drill bits and MW lathe cutting tools.

    Unless you have a belt or disc sander the other disc can probably just be a grey wheel for general grinding of mild steel which should not be ground on a CBN wheel, you can even use a grey wheel to initially shape HSS tools.

  9. #8
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    how come mild steel not suitable for CBN?

  10. #9
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    Quote Originally Posted by qwertyu View Post
    how come mild steel not suitable for CBN?
    Its too soft and will gum up the CBN crystals. CBN is only really suited to harder or tool steels.

  11. #10
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    Looking at the 'extra machinary' vs the abbot and ashby - other then power, what is the difference? Neither says what RPM the wheels spin at too

    https://www.machineryhouse.com.au/G159
    https://www.machineryhouse.com.au/G160


    ____

    I think I will go with the Vicmarc CBN wheel since its got grit on the sides too. Will using the corner of the wheel dull it really quickly?

    https://www.cwsonline.com.au/shop/it...180g-cbn-wheel

    ____

    What sort of tool rests is everyone using?

  12. #11
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    If you ask five people about sharpening, you'll get six opinions.
    My view is that a dry grinder is a shaping system as far as hand tools like chisels and plane blades are concerned. In other words, you will need to hone them after shaping to get them razor sharp. That means water stones or diamond paste/steel plate and possibly honing guide if you don't want to do it free hand.
    On the other hand, the Tormek system is a complete sharpening system, which means that the blades/chisels are ready to use straight after. My knives/blades are sharp enough to slice paper off its edge.
    I also have a CBN wheel for my Tormek which I use for shaping, and it's amazingly fast. I also use it for drill bit grinding with my Tormek drill bit jig.
    Tormek is the only wet system I'd recommend, other systems are quite inferior.
    You are welcome to come around to have a look and try the system out for yourself. Just PM me.

  13. #12
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    I have heard of many disappointments with the drill doctor.
    finding a person who can show you how to freehand sharpen is the best investment of time. fitters and turners or other metalworkers are sharpening drill bits and changing angles all day long- it is a bit tricky to learn but with a little practice you can quickly get quite good results- especially if you are only drilling wood or mild steel


    Sent from my iPhone using Tapatalk

  14. #13
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    Being able to hand sharpen drill bits quickly also means you will never pass up that box of blunt bits you come across at a garage sale again...


    Sent from my iPhone using Tapatalk

  15. #14
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    I've been using a Drill Doctor (#500, which does up to 1/2" diameter) for several years. I love it. Easy to use and reliable. I used to sharpen drill bits on a bench grinder. Not at accurate and more time consuming.

    With a bench grinder, if you want to do this at the lowest cost for the most gain, get a 6" full speed machine and a 6" 180 grit CBN wheel.

    Regards from Perth

    Derek
    Visit www.inthewoodshop.com for tutorials on constructing handtools, handtool reviews, and my trials and tribulations with furniture builds.

  16. #15
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    Quote Originally Posted by derekcohen View Post
    I've been using a Drill Doctor (#500, which does up to 1/2" diameter) for several years. I love it. Easy to use and reliable. I used to sharpen drill bits on a bench grinder. Not at accurate and more time consuming.

    With a bench grinder, if you want to do this at the lowest cost for the most gain, get a 6" full speed machine and a 6" 180 grit CBN wheel.

    Regards from Perth

    Derek
    fair enough- glad you get good results- maybe the ones i saw were chinese knock offs
    1/2 “ can be a bit limiting though .


    Sent from my iPhone using Tapatalk

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