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  1. #31
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    Quote Originally Posted by Chris Parks View Post
    Rob, dig out the grinder & see if a CBN wheel can be had for the shaft size.......
    Chris, most wheels have 1 1/4" holes & need a bush to fit your grinder shaft, so unless Rob has a very unusual size shaft (common sizes are 1/2" & 5/8") that part should present no problems. The main thing to watch is if there is enough length of shaft & thread to fit the width of the wheel (which may be what you meant?). On most grinders you will have to remove the side cover plate as it won't fit over the wider wheel. You can make up a spacer & re-fit the cover but I just left it off, which gives better access to the side, but that may have OH&S implications in a shop with employees.....

    Cheers,
    IW

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  3. #32
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    Jun 2005
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    I meant primarily shaft diameter but width is an issue as well especially if conical alignment washers have to be used to correct wheel wobble. If the shaft is too short I would shorten the hub in a lathe.
    CHRIS

  4. #33
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    I reckon a Lathe would make a great grinder . These new small ones with VFD have the swing for 200 mm wheels .
    you could change wheels fast and with VFD reverse run the leather wheels that are so good for gouge sharpening . I run thin wheels for saw and spindle moulder blade grinding as well .
    I think the lathe tool rest holder would be a good way of having grinding rests in all sorts of fast configurations too .

    Ever seen it done on something like this ?
    W385 - WL-14V Mini Wood Lathe | Hare & Forbes Machineryhouse

    Rob

  5. #34
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    Quote Originally Posted by Chris Parks View Post
    Rob, dig out the grinder & see if a CBN wheel can be had for the shaft size. If that works give me a call and I will organise a VFD for you. I bought mine from CWS because it was easy and back then there was little option. The Tormek tool rest that Derek uses is a good thing as well but you may not need it.
    Sounds good . I’m curious to see if it’s where I think it should be . If it’s not I’m in trouble . I don’t recall seeing it since I moved . It needs some work too , not sure it’ll be worth it .
    That Tormek rest looks good . Something to give square straight faster grinding would be good for chisels and the odd straight grind plane blade if that is what they do ? Does the blade clamp in ?

    Rob

  6. #35
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    Had a quick look 20 ft away and it was there ! Great !!
    The phone pics won’t be right way up probably but here’s some pics that I can fix later .
    It’s 8” 1/2 HP with 5/8 shaft and looks like it could take 1 1/2 or 1 3/4 wide wheel with covers on or I can take them off . And between the flange plates ? The right name ? It'll take a 1” thick solid stone . Looks good ? I think .
    The three phase depends on motor wiring doesn’t it ? Do I need to get a picture of that or is the blades info good ?
    image.jpg
    Attached Images Attached Images

  7. #36
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    Oh that’s where they went ! Into thumbnails . Worked out how to get them the right way up . What specifically had to be seen for VFD to work ? How the wires attach to what thing in motor .
    Rob

  8. #37
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    Rob, I guess you have 3 phase in your shed so it is just a matter of using a 3P VFD wiring it appropriately and plug everything in, job done. There is a little health problem in China at the moment affecting VFD delivery but it should be sorted out shortly I hope. I have a VFD that has not left yet so I could tack one onto the order and split the freight costs if that suits you. Best give me a call if that suits you.
    CHRIS

  9. #38
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    Quote Originally Posted by IanW View Post

    .... but busy turners... would find the 180 a better bet.
    If I could only have one it would be the #180

    Currently I have #120, #180 and #360.

    I run on full speed grinders.

    The #120 for reshaping.

    I turn off the #360.

    Great for HSS.

    Invaluable!
    Stay sharp and stay safe!

    Neil



  10. #39
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    Quote Originally Posted by NeilS View Post
    If I could only have one it would be the #180


    I turn off the #360.
    You turn off the 360 Neil . Are you saying you don't use it ? Is it to fine ?



    I was thinking the 80 and 180 would be good after talking and reading about it but haven't decided .

    Rob

  11. #40
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    no, he returns to the lathe with the tool sharpened directly off the 360, no further actions done to the tool. As in, he is turning directly after grinding off the 360...

  12. #41
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    Quote Originally Posted by NeilS View Post
    ......I turn off the #360.....
    I can see you'd get by pretty happily with those 3 wheels Neil. I take HSS metal-lathe tools sraight from the 120 wheel to the job, but the edge it leaves needs a bit more refinement for wood-cutting edges .

    It's probably my imagination, but the CBN wheels seem to leave a cleaner edge, grit-size for grit-size, which takes less work to refine on stones compared with the AlOx wheels I used for decades. My theory is that's due to the flatter surface - even a well-dressed vitreous wheel is more irregular than the surface of the CBN wheel.

    Everyone I know who has switched to CBN seems to be very happy with them. Has anyone had a bad experience, or found they fall short of expectation in their particular situation?

    Cheers,
    IW

  13. #42
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    Quote Originally Posted by poundy View Post
    no, he returns to the lathe with the tool sharpened directly off the 360, no further actions done to the tool. As in, he is turning directly after grinding off the 360...
    Yes, thanks Poundy.

    I never hone a gouge after re-sharpening on the CBN, straight to the lathe.

    But keep in mind that we turners are constantly re-sharpening and for us a #360 might be justified.

    Rob, from what I have read of your intended use, just a #180 would be a very good starting point for you.

    Add higher or lower grits later if you find you really need them.

    Enjoy!
    Stay sharp and stay safe!

    Neil



  14. #43
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    Quote Originally Posted by IanW View Post

    I can see you'd get by pretty happily with those 3 wheels Neil. I take HSS metal-lathe tools sraight from the 120 wheel to the job, but the edge it leaves needs a bit more refinement for wood-cutting edges .

    It's probably my imagination, but the CBN wheels seem to leave a cleaner edge, grit-size for grit-size, which takes less work to refine on stones compared with the AlOx wheels I used for decades. My theory is that's due to the flatter surface - even a well-dressed vitreous wheel is more irregular than the surface of the CBN wheel.
    Yes, Ian, very happy with those CBN wheels.

    They have been one of the more significant developments for me as a turner (behind HSS and scroll chucks).

    Besides the carefully controlled deposition of abrasives particles, I expect the slightly "cleaner edge" that CBN (and diamond) wheels seem to leave has as much to do with the cooler abrasion temperatures and the absence of the loose grit that breaks away from traditional vitreous wheels, causing deeper score tracks, but I have no evidence for that.

    Most significant benefits for me with CBN is the constant diameter and surface of the wheels, meaning no need to periodically dress or adjust jig settings, and the greatly reduced hot metal particles flying off into the shaving piles that you get spread around a turning workshop.
    Stay sharp and stay safe!

    Neil



  15. #44
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    Quote Originally Posted by NeilS View Post
    .....Most significant benefits for me with CBN is the constant diameter and surface of the wheels, meaning no need to periodically dress or adjust jig settings, and the greatly reduced hot metal particles flying off into the shaving piles that you get spread around a turning workshop....
    A very loud 'hear hear' to that! HSS tools & CBN wheels - major revolutions in my world...

    Cheers,
    IW

  16. #45
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    Something very strange has happened to this thread .

    Whoops its me getting mixed up

    Sorrry . Forget about it .

    Rob

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