CHENGDU JOINT CARBIDE CO., LTD.
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3mm Carbide Rotary Burr Generic Speed Steel Tungsten Rotary Tool Grinding Bits
Single cut (one flute) carbide burrs have a right handed (Up cut) spiral flute. These tend to be used with stainless steel, hardened steel, copper, cast iron, and ferrous metals and will remove material quickly with a smooth finish. Use for heavy stock removal, milling, deburring and cleaning.
Double cut carbide burrs tend to be used on ferrous and non ferrous metals, aluminium, soft steel and also for all non-metal materials such as plastics and wood. They have more cutting edges and will remove material faster. Double cut are sometimes referrred to as Diamond Cut or Cross Cut (2 flutes cut across each other) will leave a smoother finish than single cut due to producing smaller chips as they cut away the material. Use for medium-light stock removal, deburring, finishing and cleaning. A double cut carbide burr is the most popular cut and will see you through most applications.
The below image indicates the double cut, single cut and again, the double cut or diamond cut.