The picture of flap disc type according to appearance: T27 VS T29
The flap disc generally have two shapes, which includes curved and flat. The flat type is also called T27 type, and the curved type generally refers to T29 type. Flat (T27) has smooth grinding surface and is mainly used to grind the plane and the outside corners. The angle between the flat flap disc and the grinding work-piece during work can be grinded and polished at one time, reducing the work flow. The grinding surface of the curved flap disc (T29) has an upward curvature, which gives the T29 flap disc a better cutting ability in the plane. When working, the T29 grinding wheel has an angle of 15° to 25° with the grinding surface. It is mainly used for grinding of contours and edges. When the speed and cutting ability have higher requirements, the T29 type flap disc is undoubtedly the best choice.
According to type of abrasives: Ceramic Alumina VS Zirconia Alumina VS Alumina
According to the type of abrasive used, flap discs can be divided into three types: ceramic alumina, zirconia alumina, and alumina. Ceramic alumina has many crystals, good self-sharpening, relatively neat edges, good heat dissipation, and long service life. Therefore, ceramic alumina flap discs are mainly used for the grinding of stainless steel, aluminum and other hard metals. Zirconia alumina itself is a poly crystalline crystal with fast cutting speed, self-sharpening, strong ability to withstand high pressure and high temperature. Therefore, zirconia alumina flap disc has strong cutting ability and long service life. Alumina: mono crystalline crystals, the cutting ability begins to decline at the beginning of grinding and the abrasive grain are not easily broken so that the alumina flap disc are suitable for the processing of common metals.
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