Bur and Flute Recommendation for Various Materials

                                           Flute (Cut) Descriptions
                           Standard Flute Angle is 30 Degrees Right Hand

Aluma (Mill) Cut -Very wide flutes. Quick chip flow. Used on Plastics and non- ferrous metals. Very Coarse.

Standard Cut -Medium Flute coarseness. Good stock removal. Does a good job on blending and finishing. General purpose.

Coarse Cut- Wider spaced flute pattern. Rapid removal where finish is not a factor. For use on softer metals.

Fine Cut- Close spaced flute pattern. Minimal removal. Best Finish is obtained from this cut. 

Second Cuts
(Can be put on burs with fine, standard or coarse cut)

Diamond Cut- A back cut (left-hand) equal to 80% or more of the number of flutes in the first cut. Used for fine tool control and to reduce chip size from grinding almost to a powder.

Double Cut- A back cut (left hand) equal to 40-60% of the number of flutes in the first cut. Used for tool control and to break the chips from grinding into small slivers.

Chipbreaker Cut- Minimal depth crosscut flutes almost perpendicular to the shape of the bur cutting surface. Used for good tool control and to break up the chip size From grinding.