LM (original ML) type Plum flexible coupling is composed of two identical shape with protruding jaw coupling half and elastic components, the use of plum-shaped elastic element is placed between the two halves of the coupling detents to achieve two coupling halves join. Basic plum-shaped flexible coupling replace the elastic element coupling halves need to move along the axial direction in order to achieve the purpose of replacing the elastic element. LM (original ML) type Plum flexible coupling is mainly applied to frequent starting, reversing, high-speed, medium torque and high reliability requirements of the workplace, such as: metallurgy, mining, petroleum, chemicals, lifting, transportation, light industry, textile, pumps, fans, etc. Nominal torque of 25 ~ 12500N.m, allowable speed of 15300 ~ 1900r / min, the shaft diameter of 12 ~ 160mm. LM (original ML) type Plum flexible coupling has the following characteristics: simple plum-shaped flexible coupling structure, small radial size, light weight, low inertia, suitable for high-speed applications, plum-shaped flexible coupling stable reliable, have good shock absorption, cushioning and electrical insulation properties. Plum coupling with a large axial, radial and angular compensation capability, plum-shaped flexible coupling high-strength wear-resistant polyurethane elastic element oil, carrying capacity, long life, safe and reliable coupling without lubrication low maintenance, continuous long-term operation. Elastic component polyurethane and nylon two cast form. Use different materials according to different conditions, such as smooth as fans, pumps, light industry, textiles, etc. for the load when little change, the choice of polyurethane. Currently used mostly for elastomer polyurethane. The couplings are widely used in water pumps, fuel pumps, machine tools and other industries.