air cooling cnc cutting spindle best qualitySpecificationsSpindle type:GDL70-24Z/9.0Diameter :squareSpeed:12000rpm-24000rpmPower:9kwVoltage: 220V/380vCurrent:31.6A/18.2AFrequency 400-800HZJoint of nose ISO30Lub : greaseCool:air coolingBearing type 2*7008cp4+2*7006cp4Collet : Collet nut ISO20WattantyperiodBearings half a year and other parts a year