springing tooln. now rare a tool used for turning iron.
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1846 C. HoltzapffelTurning & Mech. Manip. II. 536 The finishing or hanging tools,..called also springing tools, which are made of various curves and degrees of strength, yield to these small accidental motions.
1954 Irish Times 4 Mar. 8/2 The springing tool is 1/6 extra.