Case Study – A Guide to Specifying a Wet or Dry Bed Plasma Cutting Table


Both table designs have advantages; however, dry beds have been found to result in superior cut quality and a smoother cut edge. Therefore, partnering with a machine tool supplier with knowledge and expertise to match your performance outcomes to a machine tool specification will assist you to bid for and win work supplying a price-sensitive part to the market.

Historically, wet beds were the preferred solution when the plasma head cut steel underwater because it was the most cost-effective way to trap fumes and particulates from the cutting process. Modern plasma torches no longer cut underwater and the more complex water table designs have deeper tanks with removable slat assemblies as well as pneumatically controlled mechanisms to raise and lower the water. The benefit of being able to quickly raise/lower the water table is that small parts are easily retrieved and operators can reduce the heat being transferred into the plate. This is most beneficial when oxy cutting thick parts or plasma cutting thin parts to avoid deformation created from too much heat being transferred into the part.

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