● GCLD type drum gear coupling at work, a relative angular displacement of the two axes, both inside and outside the tooth flank cyclical axial sliding, will inevitably lead to tooth wear and power consumption, therefore, gear coupling behave in a good sealing condition. Small gear coupling radial size, large carrying capacity, commonly used in low-speed heavy working conditions shaft drive, high precision and by balancing the gear coupling can be used for high-speed transmission, such as gas turbine shafting Transmission. Because of drum gear coupling to compensate for more than a straight angle gear coupling, at home and abroad are widely used drum gear coupling, gear coupling belonging straight out of the products, the choice of who should try not to choose . ● GCLD type drum gear coupling is the same number of teeth of the ring gear and flange coupling half with external teeth and other parts. Straight teeth and outer teeth into the teeth of two toothed drum, drum-shaped teeth is the so-called outer teeth into the sphere, sphere centered on the axis of the gear, the gear backlash than the average large, drum gear coupling can allow larger angular displacement (relative to straight teeth couplings), can improve tooth contact conditions, improve the ability to transmit torque and prolong life. Contact state when the angular displacement along the width of the teeth