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Traditional deburring covers only the surface work, not those scallops on the vertical edges.

Setting up a machine in the opposite configuration—a hard contact roller that moves the abrasive at high speed, and a fast conveyor—will produce a grain finish on the part surface (see Figure 4). It’s an old debate, and in truth, each system has its advantages and disadvantages.

The exact configuration depends on the application. Brushes and belts may be configured for the application.

Years ago the single-head abrasive-belt machine was the most common.

A thermal burr usually is referred to as slag or dross. The proper fuel mixture and cutting speed, replacement of burning tips, and correct optics and gases on lasers can substantially reduce the burr.

Scallops, or nibble marks, are similar to burrs but are on the part’s vertical edges, created during turret punching by the repetitive motion of the parting tool.

Combine a soft contact roller running the proper abrasives at a slow speed, and a conveyor that slowly feeds the part underneath, and you usually can get an effectively deburred part.

This combination produces a 3-D abrasive elasticity that reacts with high abrading pressure on the burrs and edges, yet creates very little pressure on the part’s surface (see This depicts a deburring system’s impact on the part surface and edge."Figure 3).

A mechanical burr is created by shearing, punching, sawing, routing, and drilling.