| abstract |
A cutting or grinding fluid composition comprising a base oil (A) and at least one member (B) selected from among C2-C6 dibasic acids, C3-C6 tribasic acids and ester derivatives thereof; and another cutting or grinding fluid composition comprising component (A), component (B), a sulfur compound (C) and/or an overbased alkali or akaline earth metal sulfonate (D). These compositions serve to improve the working efficiency, for example, inhibition of tool wear and realization of excellent finished surface accuracy. |