The Turntable change tools is mainly change tools time to be quick,the conformations have Italian air cooling spindle and the domestic water cooling spindle,the Italian air cooling spindle cost is high,the service is not very convenient,theoretically the quality and power are better than water cooling spindle.The domestic water cooling cost is low,the performance is good,the maintenance cost is low,the failure rate is also low,the shortcoming needs the good main axle water cooling.