From Mass Finishing Handbook


The two chief reasons for using mass finishing are to remove burrs and to improve surfaces. Surface finishing technology is well established and the next chapter will discuss many aspects of the effort in this area. Deburring, in contrast, for many companies, has not reached the same level of crispness or clarity of expectations. More bluntly, many operators, engineers, inspectors, and customers cannot agree on the definition of a burr or how perfect the edge must be after a burr has been removed. This chapter provides a straightforward means of defining such needs and expectations.

Webster's Collegiate Dictionary defines burr as "a thin ridge or area of roughness produced in cutting or shaping metal." This definition provides a visual image that is adequate for the lay person's understanding of what is meant by "burr." Unfortunately, it is an inadequate definition for engineers and other deburring professionals charged with removing them from parts. How does this group define "burr"? Therein lies the problem the industry lacks a uniform standard for burrs and edge finishing because its definitions of burr and burr-free are numerous and varied among the different companies. To many a burr-free part has no loose material at its edges. To some, such a part has no visible imperfections. To others, "burr-free" refers to an edge that will not cause problems in a subsequent assembly. Different companies define "burr" itself differently. Some engineers call missing material a burr. Others consider a burr to be a hump...

Products & Services
Rotary Burs
Rotary burs are cutting tools with many closely-spaced cutting edges, often with negative rake angle, for finishing or deburring edges.
Robotic Deburring Tools
Robotic deburring tools are robotic end-effectors for removing burrs, flashing, and other unwanted edge properties caused by cutting or machining.
Deburring and Deflashing Machines
Deburring and deflashing machines remove burrs or dross, smooth or deflash parting lines, round off sharp edges, and radius corners on machined parts, castings, forgings, molded components and welded assemblies.
Deburring and Deflashing Services
Deburring and deflashing services serve to round sharp edges or corners and remove flash or parting lines from forging, casting or molding operations.
Brushing Machines
Brushing machines use bristle or wire brushes to deburr, deflash, finish, polish, dedust, and clean surfaces. Brushes are also used to scour or texture surface to simulate wood grains or other patterns.

Topics of Interest

Mass finishing typically smoothes external surfaces and cleans them at the same time it removes burrs. Because they combine part improvement attributes mass finishing processes are exceptionally...

OVERVIEW Each shop seems to have a slightly different way of looking for burrs, as well as differing expectations of what burrs are and degrees of acceptability. Each inspection technique yields...

OVERVIEW The fundamentals of burr technology rely on a few simple concepts: Burr properties are a function of: material properties machining/blanking process part configuration Acceptable...

OVERVIEW A manufacturer's goal is to increase the efficiency of part passage through the deburring area and to increase the quality of the parts. For this to happen the manufacturer or plant operator...

OVERVIEW This is a practical book for process engineers, operators, and owners of mass finishing processes. It covers deburring, edge finishing, and surface finishing, but it dwells heavily on...