O-ring seal FMH-50A

stainless steelaluminumbronze

Features 1/4" shaft versions house two ball bearings that support the shaft of the o-ring seal for the smooth, low-torque operation usually found only in expensive motion feedthroughs Bronze bushings support the shaft on the 3/8" and 1/2" shaft versions A pre-loaded fluorocarbon o-ring seals the shaft, making over- or under-compression by inexperienced operators impossible Seal allows dismantling in seconds and without tools, enabling operator to replace or re-grease the o-ring easily from the atmosphere side Feedthroughs offer non-continuous manual or motor-driven operation at speeds up to 500 rpm Aluminum or stainless steel casings Use barrel adapters to mate larger shaft diameters Feedthrough uses a 1" baseplate fitting to mount to a standard 1" feedthrough port NOTE: Vacuum seals for moving shafts are best run discontinuously and infrequently. Since the elastomers in o-ring seals are dynamic—rubber presses against a moving metal surface—they are susceptible to leaks and should be used for rough and high-vacuum conditions only.