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Grinding tool bits

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Grinding tool bits
RandaB Offline
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#1
06-26-2015, 01:31 PM
This is probably quite a daft question, but is it possible to grind down a tool bit using a diamond-coated slitting disk rather than a grinder (In a high-speed minidrill)? This is for a very fine groove to be made in a bit, which a grinder won't make very well (Or at least, what we've got!). 

Jason
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DaveH Offline
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#2
06-26-2015, 02:18 PM
Jason,
Anything is possible (except my welding Big Grin ).
The material of the tool bit needs to be considered - if it has carbon in it (most steels), it is not a good idea to use a diamond disc.
If the bit is (say) tungsten carbide then a diamond disc will be fine.
Smiley-eatdrink004 
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RandaB Offline
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#3
06-26-2015, 02:45 PM
That's interesting. I didn't know about diamond coated disks and carbon. I've mainly used mine for brass, copper, aluminium and several plastics, mostly HDPE.
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dallen Offline
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#4
06-26-2015, 05:24 PM
why wouldn't you grind HSS on a diamond wheel
dallen, proud to be a member of MetalworkingFun Forum since Apr 2012.

If life seems normal, your not going fast enough! Tongue
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DaveH Offline
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#5
06-26-2015, 05:35 PM
(06-26-2015, 05:24 PM)dallen Wrote: why wouldn't you grind HSS on a diamond wheel

Because it has carbon in it and the carbon reacts with the diamond(s) and blunts them.
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DaveH Offline
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#6
06-26-2015, 05:43 PM
This is from  https://www.georgiagrindingwheel.com/gri...basics.htm


[b]Diamond wheel on steels and CBN on carbides?

Quote:
We get asked quite frequently if a diamond wheel can be used on steels and CBN on carbides.  We do not recommend this as the wheel life will be greatly reduced and in some cases, the wheels may not even cut at all.   A diamond wheel is specifically used for carbides, plastics and other synthetic materials.  It will not grind steel well at all.  CBN wheels should only be used on steels.  There is a hybrid grit available that will grind both; However, it is a compromise in wheel life and grind-ability.  But in cases where you must grind both materials at the same time, it can be a real time saver.
 

Smiley-eatdrink004
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stevec Offline
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#7
06-26-2015, 05:45 PM
Dave's right, just ask Harold the 5th  Worthy on that other forum. Blush 

Steve

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dallen Offline
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#8
06-26-2015, 05:53 PM (This post was last modified: 06-26-2015, 05:56 PM by dallen.)
learn something new everyday

BUT for what RandaB is wanting to do, it may be the only way he can accomplish what he wants to grind.
dallen, proud to be a member of MetalworkingFun Forum since Apr 2012.

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DaveH Offline
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#9
06-26-2015, 06:05 PM
(06-26-2015, 05:53 PM)dallen Wrote: BUT for what RandaB is wanting to do, it may be the only way he can accomplish what he wants to grind.

May be, depends on the tool bit material. If it is HSS there are better ways.
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stevec Offline
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#10
06-26-2015, 06:06 PM
dallen, Right on! whatever works for you  (or me Blush ).

Steve

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