DR series flexible coupling Body Material: Aluminum Alloy Rated Torque(N.m) :1N.mMax torque: 2N.mEccentricity error: ±0.2mmShaft angel ? 2°Max Rotational (rpm) :1900Rated: In-phase operate D=20 L=25 (Special bore size and slot available on request)Flexible couplings are used to transmit torque from one shaft to another when the two shafts are slightly misaligned. Flexible couplings can accommodate varying degrees of misalignment up to 3°. In addition to allowing for misalignment, flexible couplings can also be used for vibration damping or noise reduction.