by Dr. Michael Massarsky | Turbo-Finish Corporation | 917.518.8205 |
nd Dave Davidson | SME Technical Community Network |

Turbo-Abrasive Machining (TAM) is a new process for deburring and surface conditioning sophisticated multi-axis machined parts. Many parts, because of size and shape factors, can not be finished by a mass media technique but need manual intervention for final abrasive finishing. Apart from safety and production line/time considerations, a significant disadvantage of manual deburring is its impact on quality control and assurance procedures, which have often been computerized at great cost. The TAM process addresses these problems by automating the final machining and finishing production steps.


Rotating hardware deburred and finished with Turbo-Finish Corporation’s Turbo-Abrasive Machining Process. This high-speed automated dry spindle finishing method can mitigate mich of the hand-deburring and manual processing required for these components.


In TAM, fluidized bed technology is utilized to suspend abrasive or even peening materials in a specially designed chamber: Part surfaces are exposed to and interact with the fluidized bed materials on a continuous basis by high speed rotational or oscillational motion in an entirely dry environment.

The combination of abrasive envelopment and high speed rotating contact can produce important functional metal surface conditioning effects and deburring and radius formation very rapidly. Because abrasive operations are performed on all parts of rotating components simultaneously, the part and feature uniformities achieved are very hard to duplicate by other methods. In addition, sophisticated computer control technologies can be applied to create processes tailored for particular parts.

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ABOVE: Some examples of Turbo-Finish and Turbo-Abrasive Machining Processing

Although the abrasive materials used for TAM processing are in some ways similar to grinding and blasting materials, the surface condition produced is unique. One reason for this is the multi-directional and rolling nature of abrasive particle or peening particle contact with part surfaces. Surfaces are characterized by a homogenous, finely blended abrasive pattern developed by the non-perpendicular nature of abrasive attack.

There is no perceptible temperature shift in the contact area and the micrto-textured random abrasive pattern is a highly attractive substrate for subsequent coating operations. In addition to the foregoing, the process has additional advantage, in that it develops significant beneficial compressive stress and stress equilibrium in parts as well as edge and surface finish conditions that are isotropic, plateaued or planarized surface characteristics and have negatively or neutrally skewed low micro-inch surface profiles.

Dr. Michael Massarsky


Further reading:  Internet resources

(1)  “Isotropic Mass Finishing for Surface Integrity and Part Performance”,  Article From: Products Finishing, Jack Clark, from Surface Analytics, LLC and David Davidson, from SME Deburr/Finish Technical Group, Posted on: 1/1/2015, [Barrel, vibratory, centrifugal and spindle finish can improve part performance and service life.]

(2)  “Turbo-Charged Abrasive Machining Offers Uniformity, Consistency”  Article From: Products Finishing, by: Dr. Michael Massarsky, President from Turbo-Finish Corporation, and David A. Davidson, from SME Deburr/Finish Technical Group.  Posted on: 6/1/2012.  [Method can deburr, produce edge contour effects rapidly]

(3)  “Turbo-Abrasive Machining and Finishing”. MANUFACTURING ENGINEERING – Aerospace Supplement, by: Dr. Michael Massarsky, President from Turbo-Finish Corporation, and David A. Davidson, from SME Deburr/Finish Technical Group. [Method first developed for the aerospace industry can improve surface integrity and part performance]

(4)  “The Role of Surface Finish in Improving Part Performnce”, MANUFACTURING ENGINEERING, by Jack Clark, Surface and David A. Davidson, from SME Deburr/Finish Technical Group.

(5)  “Free Abrasives Flow for Automated Finishing”, MANUFACTURING ENGINEERING, ,by: Dr. Michael Massarsky, President from Turbo-Finish Corporation, and David A. Davidson, from SME Deburr/Finish Technical Group. [Exciting new methods of surface finishing that go beyond deburring to specific isotropic surface finishes that can increase service life]

(6) Turbo-Abrasive Machining Demonstration Video:

(7) SME Spokane, WA Factory Floor video, Centrifugal Finishing in the Precision Machine Shop: Demonstration)



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