pened the collet would fly up into the nut and a lot of times ejecting the [tap] straight out of the collet.” Holsinger further testified that the farthest he had seen a tap eject was “probably a couple of feet.” Another witness, Kevin Bilideau, testified that he had seen taps eject from toolholders on numerous occasions. Once, in 1989, Bilideau had been operating a VMC 150 when he removed the tool assembly and secured it on the Monarch vise in order to change the tap. Bilideau testified that, as he was changing the tool, the tap “shot out and hit me right in the glasses ... it was a good hit. It wasn’t light.” Similarly, another witness, Leonard Arsenault, a supervisor at Raytheon, testified that, after Simmons’ accident, he recreated the accident and observed a tap eject upward six to eight inches. Finally, another Raytheon employee, Gary Cook, testified that, after the accident, he performed tests to determine whether taps would eject. Cook stated that “sometimes [the tap] would pop up and sometimes it would really fly up and hit the top of the guard [that Raytheon had since installed], and there were all variations of height when it would come up.”
Although Monarch had designed its vise as an accessory to the VMC 150, Monarch never conducted any tests to ascertain the risks presented to the worker by the tool changing operation. Moreover, although the vise was designed such that a tool would point toward a worker’s face, the vise was not equipped with a shield to protect the worker against ejecting taps. At trial there was evidence that the vise could have been equipped with a safety shield at a cost of approximately $30. There was also evidence that, following Simmons’ accident, Raytheon installed a plexiglass shield over the vise and that the shield did not interfere with the vise’s function in any significant way.
1. Monarch’s motion for judgment notwithstanding the verdict. “The standard of review to be employed on a motion for judgment notwithstanding the verdict and a directed verdict is the same . . . .” Whitehall Co. v. Barletta, 404 Mass 497, 504 (1989). In considering whether the trial judge properly denied Monarch’s motion for judgment notwithstanding