What are the different types & sizes

of burrs and rasps?

The names of individual burrs and rasps refer to their shape. Different shapes can be used for various carving and grinding tasks. Most shapes of burrs are available in standard sizes as well as mini, the exceptions being countersink burrs, but these are available in three different sizes, and the flame burr, which is only available in a mini size.  

Ball end burrs

The ball end burrs have a spherical body.

Bullnose burrs

Bullnose burrs have a body with straight edges and a rounded tip. 

Countersink burrs

Countersink burrs have cone-shaped bodies for shaping drilled holes to countersink screws or bolts. 

Cylinder burrs

Straight burrs which don't have a bottom cut facility are known as cylinder burrs.   

Flame burrs

Flame, or engraving, burrs have a much thinner, and usually longer, cone shape than countersink burrs.

Rasps

Rasps are shaped like cylinder burrs, but with crossover flutes.

Tree burrs

Tree burrs have a cone-shaped body with slightly rounded, rather than straight, sides. 

What burr and rasp

sizes are available?

Burrs and rasps from Trend are available in a range of standard sizes and mini sizes. 

Standard rasp and burr sizes

Shank diameter of standard burrs and rasps

Standard rasps and burrs are available with shanks that are 6mm or ¼" in diameter. 

Diameter of standard burrs and rasps

The bodies of rasps and burrs have diameters which are usually 10mm. Countersink burrs have diameters ranging from 10mm to 16mm and rasps are available with diameters of 6.3mm or 12.7mm.

Cutting edge length of standard burrs and rasps

The length of burr and rasp's bodies is usually 10mm or 20mm. Countersink burrs have cutting edges which are either 10mm, 13mm, or 16mm long and rasps have cutting edges or 19mm or 20mm. 

Mini rasp and burr sizes

Shank diameter of mini burrs and rasps 

All mini burrs and rasps have shank diameters of 3mm.

Diameter of mini burrs and rasps 

Mini burrs and rasps have bodies which are 3mm or 6mm in diameter.  

Cutting edge length of mini burrs and rasps 

Most mini burrs and rasps have cutting edges which are 12mm in length. One of the bullnose burrs has a cutting edge which is 13mm and the ball end burr's edge is just 6mm long.