Taping torque test for cutting fluid evaluation: test method and procedure

Tapping torque is a parameter closely connected to the lubricating effect of a cutting fluid. Tapping involves many small cutting edges in continuous contact with the work throughout the cut. The design of the tools and the nature of this operation shield the edges of the tool from the flow of the cutting fluid, with a resulting enhancement of the lubrication properties. Low tapping torque corresponds to good lubrication and a process with good lubrication is preferred, since it normally results in longer tool life and better surface quality