PHD Inc. offers linear slides that are IP54 and even IP67 rated (for washdown)

PHD Inc. offers electric Series ESU linear slides that are IP54 rated with magnetic band sealing for rugged protection. These are electric-motor and belt-driven linear actuators with a robust enclosed design and high-capacity rail bearing system to deliver exceptional moment and load capability. Available in three sizes with travel lengths to 5,500 mm (with  other travel lengths available) and speeds to 5,000 mm/sec, the electric base slides can combine to create multi-axis motion systems...

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