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Dynamic O-Ring Shaft Seal

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
• 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.

Dimensional Drawings