Grinding fluids perform functions which might be expected to affect the residual surface stresses resulting from a grinding operation. Stresses were analyzed in bars of hardened ball-bearing steel, surface ground in the presence of thirteen different fluids. The results suggest that the effectiveness of a fluid in minimizing residual grinding stresses depends not so much upon its capacity for removing heat from the surface as upon its ability to reduce frictional forces between the wheel and the work.

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