河南 Hebei, Shanxi and Shandong, Anhui, Jiangxi drum gear coupling production plant in Zhengzhou Fest coupling drum gear coupling with radial, axial and angular axis offset compensation capability, etc., with a compact, rotary radius is small, large carrying capacity, high transmission efficiency, low noise and long maintenance cycle, etc., especially for low-speed heavy working conditions, such as metallurgy, mining, lifting transport and other industries, is also used in petroleum, chemical, general machinery, etc. various types of mechanical shaft drive, drum gear coupling is rigid-flex couplings, gear coupling is determined by the same number of teeth of the ring gear and flange with external teeth and other parts of the coupling half . Straight teeth and the outer teeth into two kinds of drum gear tooth, called the outer drum gear teeth is made of spherical, spherical center axis of the gear, the gear backlash than the average large drum gear coupling can permits a larger angular displacement (relative to the straight-tooth coupling) to improve tooth contact conditions, and improve the transmission torque capacity and prolong life. With angular displacement along the tooth width of the contact. Gear coupling at work, the two axes produce relative angular displacement, external tooth tooth surface periodically for axial sliding, will inevitably lead to tooth wear and power consumption, therefore, gear couplings need to have a good and sealed state of work. Gear coupling small radial size, load capacity, commonly used in low speed and heavy working conditions shaft drive, precision and by balancing the gear coupling can be used for high-speed transmission, such as gas turbine shafting transmission. As drum gear coupling angular compensation than straight teeth coupling, at home and abroad are widely used drum gear coupling, gear coupling belonging straight out of the product, selection should try not to use . Drum gear coupling characteristics (compared with the direct gear coupling has the following characteristics): 1, drum gear coupling loading capacity. Within sets of teeth in the same outside diameter and maximum diameter of the coupling, the drum gear coupling average carrying capacity than the straight-tooth coupling increased by 15 ~ 20% 2, the angular displacement large amount of compensation. When the radial displacement is zero, straight gear coupling permissible angular displacement of 1o, while the drum gear coupling permissible angular displacement of 1o30'''', increased by 50%. In the same modulus, teeth, tooth width, the drum gear than straight teeth allows large angular displacement, 3, drum-shaped drum gear coupling tooth surface so that the inner and outer tooth contact conditions improved, avoiding the In the angular displacement conditions BARS tooth side edge extrusion, stress concentration defects, while improving the tooth surface friction, wear conditions, reducing noise, long maintenance cycle. 4, drum gear coupling sleeve outer teeth tooth tip was horn shape, so that the inner and outer gear assembly and disassembly is very convenient. 5, drum gear coupling transmission efficiency up to 99.7%. Based on Scripture characteristics of the current domestic and foreign has generally replaced with straight teeth drum gear coupling. 6, I plant couplings short duration, fast delivery. 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