What is A Machining Burr?

Machining burrs are the unwanted projections of material that remain on parts after machining is complete. Burrs are often sharp, raised bits of material that impact part quality and longevity. Different types of burrs are formed depending upon the material and machining process used:

ROLLOVER BUR OR EXIT BURR
A roll over burr happens during the machining process when a part is being pierced, punched, parted, notched, or sheared. One of the most common burrs, it is formed when the machine first engages the part and pulls the material causing it to bend or rollover.
TEAR BURR
A tear burr occurs when the material on the machined part tears or deforms rather than being sheared commonly during the side-milling process. The torn portions remain on the workpiece after machining.
POISSON BURR
A poisson burr is formed when material bulges outwards or sideways when the machine tool applies a downward force on the part.
CUT-OFF BUR (OR BREAKOUT BURR)
A cut-off or breakout burr can appear when there is a separation of the work material before the cut is finished.

ISO Finishing specializes in mass finishing burr removal for parts in any material. More efficient and economical than hand deburring, our high-energy centrifugal barrel finishing (CBF) and vibratory deburring processes achieve superior surface finishes which are customized, documented and repeatable.

The best way to show you how our finish will be your finish is to process your sample. Let us show you what we can do. LET’S GET IT FINISHED.