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Centrifugal Finishing

Often called “high-energy tumbling” or harperizing. Arrow uses these rapid finishing workhorses for polishing, deburring, and deflashing metal parts and various types of plastics.

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Quality Without Production Jams

We handle parts of many sizes, from turbine fins to medical components and automotive parts, producing high-quality centrifugal finishing results in shorter cycle times. That makes the process efficient and cost-effective for you.

Common Types of Parts Finished

  • Medical implants
  • Surgical devices
  • Buckles
  • Trigger mechanism
  • Automotive components
  • Screws, rivets, and other fasteners
  • Rollers and balls
  • O-rings
  • Thermoset plastics
  • Springs and swivel pins
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Highest-Caliber Finishing

Beyond speed, harperizing handles a number of simultaneous processes, further improving production throughput of your parts.


Common Applications of Centrifugal Finishing

  • Components requiring high cosmetic finish
  • Parts requiring low-micro finish
  • Aggressive edge radiusing
  • Material removal
  • Cleaning, including recessed areas


Other Services


A finishing process that deburrs and polishes parts in a much shorter period of time, compared to conventional tumbling and vibratory finishing.

Due to the size of these machines, Harperizing/Centrifugal Finishing is primarily used with parts ranging in size from .010” to 2”.

Centrifugal finishing is a great alternative to tumbling and vibratory finishing because of the G forces produced, there is also the ability to reach areas where conventional tumbling and vibratory finishing cannot reach.

Surface Roughness Conversion Chart

Ra (micrometers) Ra (microinches) RMS CLA (N) Rt N Cut-off Length (in) Cut-off Length (mm)
0.025 1 1.1 1 .3 1 0.003 0.08
0.05 2 2.2 2 0.5 2 0.01 0.25
.1 4 4.4 4 0.8 3 0.01 0.25
.2 8 8.8 8 1.2 4 0.01 0.25
0.4 1.6 17.6 16 2.0 5 0.01 0.25
0.8 32 32.5 32 4.0 6 0.03 0.8
1.6 63 64.3 53 8.0 7 0.03 0.8
3.2 125 137.5 125 13 8 0.1 2.5
6.3 250 275 250 25 9 0.1 2.5
12.5 500 550 500 50 10 0.1 2.5
25.0 1000 1100 1000 100 11 0.3 8.0
50.0 2000 2200 2000 200 12 0.3 8.0
Ra = Roughness Average in micrometers or microinches.
RMS = Root Mean Square in microinches.
CLA = Center Line Average in microinches.
Rt = Roughness Total in microns
N = New ISO (grade) scale numbers.
Cut-off Length = Length required for sample.

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