Select the right carbide burr: Shape
There’s a shape to match every job.
Do you need to work on a fillet weld, smooth out a bump or bevel off an edge? If you make sure you choose the right burr shape from the outset, you’ll get an even cleaner and faster job done on the workpiece. The figures below show which burr and which shape work the best in a range of scenarios.

Carbide burr shape (ZYA)
Cylinder without end cut

Carbide burr shape (ZYAS)
Cylinder with end cut

Carbide burr shape C (WRC)
Ball-nosed cylinder

Carbide burr shape D (KUD)
Ball

Carbide burr shape (TRE)
Oval

Carbide burr shape F (RBF)
Ball-nosed tree

Fresa de metal duro forma G (SPG)
arco apuntado

Carbide burr shape H (FLF)
Flame

Carbide burr shape J (KSJ)
60° countersink

Carbide burr shape K (KSK)
90° countersink

Carbide burr shape L (KEL)
Ball-nosed cone

Carbide burr shape M (SKM)
Cone
Select the right carbide burr: Cut
If the workpiece is hard, the cut should be fine. Need to work on steel, aluminium or cast iron? To make your selection, you first need to consider the material. Not every cut works just as well in every material. We’ve put together some information here for you about the best cut for the various kinds of material.
Select the right carbide burr: Speed
Setting the right speed is hugely important and depends on the diameter of the carbide burr. This is essential to ensure an optimum working result – and also avoids having to compromise on the lifetime of your tool. If the speed is too low, the burr will not run smoothly: it vibrates (you can hear and feel this) and wears down more quickly. You can find an overview of the exact burr rpm you need to use (to match the recommended working speed) here.
And also keep the following in mind

“For fillet welds, never push, always pull – and excessive pressure is also counterproductive”
Mario Schlesiger,
RHODIUS