The masonry bit is a variation of the Twist Drill Bit, the bulk of the Tool is a relatively soft steel, and is machined with a mill rather than ground. An insert of tungsten carbide is brazed into the steel to provide the cutting edges.
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Masonry bits typically are used with a Hammer Drill, which hammers the bit into the material being drilled as it rotates; the hammering breaks up the masonry at the Drill Bit tip, and the rotating flutes carry away the dust.
Hammer drill bits often use special shank shapes such as the SDS type, which allows the bit to slide within the chuck when hammering, without the whole heavy chuck executing the hammering motion.
Masonry bits of the style shown are commonly available in diameters from 3 mm to 40 mm. For larger diameters, core bits are used. Masonry bits up to 1,000 mm (39 in) long can be used with hand-portable power tools, and are very effective for installing wiring and plumbing in existing buildings.
Taiguo: Recently developed the largest environmentally friendly boiler in China
On May 13th, Taiyuan Boiler Group successfully developed the 1000t/h circulating fluidized bed boiler, the largest environmentally friendly boiler in China with independent intellectual property rights.
It is understood that the circulating fluidized bed boiler is the most advanced environmentally friendly boiler in the world. It adopts cyclic vulcanization combustion technology to fully burn coal, improve boiler temperature, and achieve desulfurization in the furnace, effectively eliminating the emission of carcinogens. Both ash and slag can be comprehensively utilized, and have the advantages of energy saving and small pollution, and are widely used in large and medium-sized power plants.
For a long time, the combustion and large-scale technology of circulating fluidized bed boilers have been monopolized by enterprises in developed countries such as Europe and the United States. China began to introduce foreign circulating fluidized bed boiler technology from the 1980s. In 1997, Taiyuan Boiler Group cooperated with Tsinghua University to develop 35t/h, 75t/h, 130t/h, 220t/h and 440t/h circulating fluidized bed power stations using the theory of “stationary design†with independent intellectual property rights. boiler. Compared with foreign products, the circulating fluidized bed boiler produced by Taiyuan Boiler Group has wide adaptability. Many incombustible objects such as coal gangue, medium coal, secondary coal and peat can be fully burned.
The successful development of the 1000t/h circulating fluidized bed boiler has made Taiyuan Boiler Group's comprehensive competitiveness leap into the top four of China's boiler industry and is in the leading position in the domestic circulating fluidized bed boiler market.