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19th Feb 2019, 01:30 PM #1Senior Member
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- Jun 2007
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- Victoria, Australia
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- 114
CBN (Cubic Boron Nitride) grinding wheel?
Is anybody using a CBN grinding wheel for sharpening HSS? What are your impressions? Worthwhile? Where can one buy CBN wheels in Australia?
Regards,
Tom
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19th Feb 2019, 01:49 PM #2Pink 10EE owner
- Join Date
- Aug 2008
- Location
- near Rockhampton
- Posts
- 6,218
I have one, I would not buy another simply because they are extremely expensive and do not last as long as you would hope for the price.
Mine is no where near as effective as it was when new and I would not say it has done a lot of work.Gold, the colour of choice for the discerning person.
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19th Feb 2019, 03:00 PM #3Member: Blue and white apron brigade
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- Feb 2006
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- Perth
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- 7,189
I've had mine for 4 years and just noticed recently it is just not quite as good as when it was new. I haven't exactly been that kind to mine but if I can get another year out of it I might buy a new one.
I got mine from here
https://www.cwsonline.com.au/shop/ca...rinding-wheels
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19th Feb 2019, 03:38 PM #4Most Valued Member
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- Nov 2007
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- melbourne australia
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- 3,228
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19th Feb 2019, 04:56 PM #5China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 1,657
Most of the CBN wheels being sold in Australia at places like CWS and Carbatecc etc, are budget plated items for occasional use, and are affordable, a "industrial" resin bonded wheel will out last several plated wheels
and cost over twice the price
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19th Feb 2019, 07:07 PM #6Member: Blue and white apron brigade
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 7,189
Reading on another forum there was a discussion about how because CBN wheels were so good when new, folks do more shaping with the finer grit ones which they are not really designed to do. Mine is a 180 grit and I have used it a fair bit for shaping and was wondering if that contributed to its slow demise. Next time I was thinking I would get an 80 for shaping and leave the 180 I have for just touching up edges?
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19th Feb 2019, 07:21 PM #7Most Valued Member
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- Nov 2007
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- melbourne australia
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- 3,228
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19th Feb 2019, 08:04 PM #8Member: Blue and white apron brigade
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- Feb 2006
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- Perth
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- 7,189
yeah I'd say so. I mainly use mine to touchup lathe HHS and Crobalt diamond profile bits. More often than I like, the Crobalts looses a small chip off the end of the tip but much more metal needs to be removed than you might think to get a sharp point tip again. This should really be done on an lower grit than 180.
The woody turners that seem to get a long life from them are just swiping their turning chisels a couple of times to touch up their cutting edge - they don't usually have to remove metal to get past divots in an edge or usually shape with their CBNs.
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19th Feb 2019, 09:23 PM #9Senior Member
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- Jun 2005
- Location
- Townsville, Tropical Nth Qld.
- Posts
- 226
You may want to have a look at this site, he has wheels in every size and grit.
https://woodturnerswonders.com/collections/cbn-wheels
Rgds,
Crocy.
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19th Feb 2019, 09:33 PM #10
Hi Guys,
I originally got one for use on my four facet drill grinder, but I found it very aggressive and so I switched to a resin bonded diamond one, 300 grit size. Its much better and doesn’t leave grinding tracks on the drill edges.Best Regards:
Baron J.
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21st Feb 2019, 12:42 PM #11Golden Member
- Join Date
- Dec 2007
- Location
- Adelaide
- Posts
- 574
I'm assuming CBN and also bonded diamond wheels do not need to be dressed or trued, does this mean that more care is needed in mounting the wheel so it runs true, I've seen videos on youtube of a wheel being mounted on a bench type grinder and I can see run out when the wheel is spun over by hand, is this much of an issue or can it be ignored ?
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21st Feb 2019, 05:04 PM #12China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 1,657
Bonded wheels need to be dressed plated wheels do no, although both varieties should be balanced as should any type of grinding wheel, the more run out you have the less accuracy you will have and
will get less life from the wheel
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23rd Feb 2019, 12:27 PM #13Golden Member
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- Dec 2007
- Location
- Adelaide
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- 574
I've read comments on other forums that bonded diamond is for carbide and cbn is for hss, using bonded diamond on hss will result in the wheel clogging - is this correct ?
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23rd Feb 2019, 01:46 PM #14Most Valued Member
- Join Date
- Nov 2007
- Location
- melbourne australia
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- 3,228
Here's a good review of CBN wheels. Toward the end of the video he says CBN wheels have a breaking-in period during which they cut more aggressively. I'm hoping that's what I experienced, rather than premature wearing of the wheel.
https://youtu.be/IOXXiPK1L4sChris
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23rd Feb 2019, 03:51 PM #15China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 1,657
Familyguy that is correct Diamond should not be used on steel
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