NTN轴承安装结束后，为了检查安装是否正确，要进行运转检查。小型机械可以用手旋转，以确认是否旋转顺畅。检查项目有因异物、伤痕、压痕而造成的运转不畅，因安装不良，安装座加工不良而产生的力矩不稳定，由于游隙过小、安装误差、密封摩擦而引起的力矩过大等等。如无异常则可以开始动力运转。
After the NTN bearing is installed, check the operation to check whether the installation is correct. Small machinery can be rotated by hand to confirm whether it is rotating smoothly. Inspection items are due to foreign bodies, scars, indentation caused by poor operation, due to poor installation, installation of poor processing and instability caused by torque, due to small clearance, installation error, sealing friction caused by the torque is too large and so on. If there is no abnormality, it can start the power operation.
大型机械不能手动旋转，所以空载启动后立即切断动力，机械空转，检查有无振动、噪音、旋转部件是否有接触等等，确认无异常后，进入动力运转。
Large machinery can not be manually rotated, so no-load start immediately after cutting off power, mechanical idling, check whether there is vibration, noise, rotating parts are contacted, etc., to confirm that there is no abnormality, into power operation.
动力运转，从空载低速开始，缓缓的提高至所定条件的额定运转。试运转中检查事项为，是否有异常音响、NTN轴承温度的变化、润滑剂的泄漏或变色等等。如果发现异常，应立即中止运转，检查机械，必要时要拆下NTN轴承检查。
The operation of power starts slowly from no load and slowly increases to the rated operation of the prescribed conditions. The checking items during commissioning are: whether there is abnormal sound, NTN bearing temperature change, lubricant leakage or discoloration, etc. If abnormal is found, the operation should be stopped immediately, the machinery should be inspected, and the NTN bearing inspection should be removed if necessary.
NTN轴承温度，一般可根据NTN轴承座的外部温度推测。但利用油孔直接测量NTN轴承外圈的温度更加准确。NTN轴承温度，从运转开始逐渐升高，通常1——2小时后温度稳定。如果NTN轴承安装不良，温度会急剧上升，出现异常高温。其原因诸如润滑剂过多、NTN轴承游隙过小、安装不良、密封装置摩擦过大等。高速旋转的场合，NTN轴承结构、润滑方式的选择错误等也是其原因。
NTN bearing temperature can generally be deduced according to the external temperature of NTN bearing block. However, it is more accurate to directly measure the outer ring temperature of NTN bearings by using oil holes. NTN bearing temperature gradually increases from operation, usually 1——2 hours after the temperature is stable. If the NTN bearing is not installed properly, the temperature will rise sharply, and there will be an abnormal high temperature. The reasons include too much lubricant, too small clearance of NTN bearing, poor installation, excessive friction of sealing device, etc. High speed rotation, NTN bearing structure, lubrication mode selection error is also the reason.
NTN轴承的转动音用听诊器等检查，有较强的金属噪声、异音、不规则音等说明异常。其原因有润滑不良、轴或NTN轴承座精度不良、NTN轴承损伤、异物侵入等。
NTN bearing rotating sound with stethoscope and other examinations, there are strong metal noise, abnormal sound, irregular sound and so on, indicating abnormal. The reasons are poor lubrication, poor accuracy of shaft or NTN bearing block, NTN bearing damage and foreign matter intrusion.