从电机转矩的计算公式（T=9550 P / n ）可以看出，当电机功率相同时，低速电机对应的转矩较大。

电机轴伸是传动的关键零部件，除电机与设备的对接尺寸控制外，电机轴伸的直径大小、轴的材质，以及具体的加工控制要求，都直接影响着电机的转矩能力体现，是一种机械能力表现。

当电机的转矩超过其可以承当的范围时，即电机发生过载，电机的电流会因为过载出现大幅增加，导致绕组发生过热烧毁问题；即使电机绕组能满足过载要求，就电机的轴而言，过载意味阻力矩大，作用在轴上力矩太大时，会对轴伸造成直接的伤害，特别是对于轴伸加工不太规范的情况，容易发生电机轴伸挠曲或断裂的质量事故。

From the calculation formula of motor torque (T=9550 P/n), it can be seen that when the motor power is the same, the torque corresponding to the low-speed motor is larger.
Motor shaft extension is a key component of transmission. In addition to controlling the docking size between the motor and equipment, the diameter of the motor shaft extension, the material of the shaft, and specific processing control requirements all directly affect the torque capability of the motor, which is a manifestation of mechanical capability.
When the torque of the motor exceeds its acceptable range, that is, the motor is overloaded, and the current of the motor will increase significantly due to the overload, causing the winding to overheat and burn out; Even if the motor winding can meet the overload requirements, for the motor shaft, overload means a large resistance torque. When the torque acting on the shaft is too large, it can cause direct damage to the shaft extension, especially for non-standard shaft extension processing, which can easily lead to quality accidents such as motor shaft bending or fracture.