All three versions of the ball plungers are used for securing as well as for pressure and stand-off functions. “The 615.5 stainless steel ball plungers are suitable for use in highly corrosive environments,”said John Winkler, CEO, Office of the President at JW Winco. “Plus, the ceramic ball is low wearing, anti-magnetic, and electrically insulating.”
Versions 615.8 and 615.9 feature the ball mounted in a plastic friction bearing shell so as to be freely movable, which enables rolling and optimizes the securing characteristics. “Above all, this reduces wear on the mating part” Winkler said. “Another characteristic of these plungers is that the plastic friction bearing shell also acts as an electrical insulator.” Plastic shell temperature resistant up to 194 °F (90 °C).