Power Tools

Need to adapt a flange, grind down a weld or smooth out an intake port? This category brings together rotary carbide burrs for die grinders that shape steel and aluminium in a controlled way on your project. The shape of the burr head and the cut affect what kind of work it is suited for – and how fine the surface finish will be.

What are carbide burrs used for?

A carbide burr is clamped in a die grinder and removes material with many small teeth. You can use it to deburr, grind down welds, adapt flanges or shape ports in intake manifolds and cylinder heads. We stock burrs from COMP Cams in several head shapes, and additional parts for the machines can be found under power tool accessories.

How to choose shape, cut and length

Choose the shape according to the surface you need to work on:

• Ball: recesses and rounded port walls.
• Flame and tree shape: a more pointed profile that can reach into tight transitions.
• Oval: smooth transitions and port smoothing.
• Cylinder with radius end: flat surfaces and edges, where the rounded end typically reduces the risk of gouging in corners.

Burrs with Al Cut in the name have a cut designed for aluminium, so the chips clear more easily and do not clog the teeth. For steel, a standard cut is normally used. A 6-inch long burr reaches deeper into a port, while a short one typically gives more control and less vibration.

Use and maintenance

Let the burr do the work with even, light pressure, and keep it moving so it does not dig in. The right speed depends on diameter, material and machine. Clean aluminium residue from the teeth, and always wear safety glasses. Clamp the workpiece securely with shop equipment, and complement with engine tools for the rest of the job.

Frequently asked questions

Can I use the same burr for steel and aluminium?

It is possible, but aluminium tends to stick in a standard cut, so the burr cuts less effectively. For aluminium, a burr with an aluminium cut is typically the better choice.

Which shape should I choose for intake ports?

It depends on the shape of the port and the access. Ball and oval shapes are typically used for rounded walls, flame and tree shapes for transitions, and a long burr may be necessary to reach deep inside.

Why does the burr vibrate or chatter?

It can be caused by too much pressure, the wrong speed, a worn burr or too much overhang on a long burr. Also check that the collet is clean and matches the shank.

When should a carbide burr be replaced?

When it tears the material rather than cutting, heats up quickly or requires noticeably more pressure, the teeth are typically worn. Stuck aluminium can often be removed, but broken teeth mean the burr should be replaced.