Manual, Flexdeburr, RS-340
Document #9610-50-1016-08
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4.5 Cutter Operation and Bur Selection
The RS deburring tool performs best in “climb milling”, which is when the cutter directions of traverse
and rotation are the same. In the case of the RS deburring tools, the bur rotation is clockwise when viewed
from above. Climb milling would therefore involve clockwise motion around the part being deburred. In
climb milling, the heaviest cut is made as the tool enters the work piece and the chip becomes narrower as
the cut is completed. In “conventional milling”, the cutter directions of traverse and rotation are opposite.
Conventional milling may aid in cutter stability for some operations; however, the cutting edge of the tool
is subjected to higher friction and cutting forces. Tool wear is accelerated in this mode, and surface finish
quality is generally reduced. When conventional milling, take extra care around corners. A corner poses a
potential hazard where the cutting force can deflect the bur and cause the bur to break as the robot continues
along its path.
The selection of a cutting tool is highly dependent upon the part material and geometry, and the depth of cut.
It is not practical to present all the possibilities in this document. Please see
for
a short list of burs and suitable applications. A specific family of burs is available for working with die cast
alloys, aluminum, and plastics. These burs have fewer teeth and increased relief to minimize chip loading.
Plastics represent the most difficult deburring challenge due to the phenomenon of chip re-welding. In this
process, if the bur is dull or the feeds and speeds are not correct for the material removed, the chip will melt
and weld to the bur or the work piece. This welding can quickly load a bur and produce unacceptable results.
The traverse or feed rate of the deburring tool is higher for plastics to minimize melting and welding. A
higher feed rate causes larger cuts, which more effectively remove heat from the cutter-tool interface.
4.5.1 Bur Selection
Standard length commercial burs are used with Flexdeburr products. The length of these tools is
typically around 2 inches for 1/4” shank diameter burs (50 mm for 6 mm diameter). Avoid longer
shank burs that are available from industrial suppliers and appear in their catalogs with descriptions
such as “long” or “extended” shank. Using extended or long shank burs in the Flexdeburr will place
higher loads and vibrations on the motor bearings resulting in reduced motor life. Bearing failure
caused by the use of extended shank burs is not covered under warranty.
CAUTION:
Do not use long or extended shank burs with the Flexdeburr.
Long shank tools can lead to premature failure of the turbine motor and is
not covered under warranty. Use standard length commercial burs with the
Flexdeburr.
