[modeleng] Diamond versus Stone

Hi All,
A fellow student at the Workshop Appreciation course is making a tool  
grinding rig for attachment to a standard grinder, (Harold Hall design). He has 
 
been searching for a supplier of stone cup wheels without success, can any one  
point us in the right direction.
 
He has been advised that the diamond type would not be suitable for  
sharpening things such as end mills, is this correct?  It seems odd to me,  
particularly as diamond type are becoming more common and cheaper now.
 
Regards Ken Jones in sunny Berkshire


   


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