Spindle and Slurry Deburring

Since the metalworking industry has a wide variety of finishing requirements and an equally wide range of products to be finished, the efforts necessary to accomplish the desired results demand increasing degrees of specialization.

The spindle concept is sometimes referred to as a “Slurry Deburring Machine” or “Flowing Abrasive Machine.” The equipment generally includes a circular rotating tub holding lose media/abrasive, a rotary spindle to hold parts and fixturing.

The principle of this process is to use slurry deburring to finish a workpiece mounted on the rotary spindle by immersing it into a rapidly moving abrasive slurry. The velocity of the abrasive is generated by the rotating tub speed suitable for the process requirements. The abrasive particles swiftly flow over and through holes and rough edges, removing sharpness and burs.

The following capabilities and advantages of spindle finishing are justifiably recognized:

  • Rapid, precision finishing of parts.
  • Part dimensions can be maintained to extremely close tolerances.
  • Uniform deburring, radius forming, blending of machine or grind lines, and improved micro-inch surface finishes can be accomplished on external surfaces.
  • Short process cycles, generally ranging from 5 seconds to 5 minutes.
  • Parts are fixtured, resulting in no damage due to part-on-part impingement.

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Spindle Finishing Models and Specifications


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In this video, you can see abrasive slurry moving at speeds of up to 1000 surface feet per minute. This processes large parts or clusters of small parts on spindle mounted chucks. Then the centrifugal force spins the selected finishing media into a “form-fitting grinding wheel”. Slowly rotating the parts in mass assures uniform deburring and finishing of all surfaces. This machine can deliver precision finishing of gears, bearing cages, splined shafts, pump rotors, jet compressor discs, jet blades and other complex parts. Contact Advanced Deburring & Finishing for the slurry machine you need!

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