Coarse-grain-size diamond wheels

Ductile-Mode Ultra-Smoothness Grinding of Fine Ceramics with Coarse-Grain-Size Diamond Wheels... 

Yasui, H. and Yamazaki, G., Possibility of ultra-smoothness grinding of fine ceramics using a coarse grain size diamond wheel. Journal of the Japan Society for Precision Engineering, Vol. 69, No. 1, 2003, 115. 

As stated above, ductile-mode grinding of fine ceramics is possible with plunge grinding with the coarse 140-mesh grain-size diamond wheel. The 3D surface roughness in ductile-mode plunge grinding, however, is limited... 

This chapter introduces that the coarse 140-mesh diamond wheel can be used for ultra-smoothness grinding of fine ceramics. First of all, we discuss that ductile-mode grinding of fine ceramics with the coarse 140-mesh metal-bonded diamond wheel is possible because of the experimental relationship between the table speed and the groimd workpiece smiace. Second, the influence of the speed of the wheel and the workpiece material on ductile-mode grinding is explained. Finally, the newly developed ductile-mode ultra-smoothness grinding method with coarse-grain-size wheel, in which the resultant smiace roughness is below about 10 ran (P-V) and 1 nm (RMS), is introduced. 

Grain size is a major factor in the surface finish but the method of dressing the wheel also plays an important part. Fine finishes can be obtained with relatively coarse wheels if the wheel is dressed carefully with a diamond and grinding infeed is properly adjusted. A poor finish can result even with a fine wheel if the grinding techniques used are wrong. 

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