Low noise sound

Product name: GDF87-18Z/13.5 Rotating speed: 18000RPM Rated power: 13.5KW Torque: 6.36Nm Voltage: 380V Current: 31A Frequency: 600HZ Connection of spindle end: ER40-Φ3.175-Φ26 Cooling: Water cooling Lubrication: Grease Bearing No.: 2*S7010C P4,2*S7007C P4...

Product name: GDF60-18Z/5.5 Rotating speed: 18000RPM Rated power: 5.5KW Torque: 2.65Nm Voltage: 220/380V Current: 21.5/12.5A Frequency: 300HZ Connection of spindle end: ER32-Φ3.175-Φ20 Cooling: Water cooling Lubrication: Grease Bearing No.: 2*7008C...

Product name: GDF60-18Z/4.0 Rotating speed: 18000RPM Rated power: 4KW Torque: 2.12Nm Voltage: 220/380V Current: 15/9A Frequency: 300HZ Connection of spindle end: ER32-Φ3.175-Φ20 Cooling: Water cooling Lubrication: Grease Bearing No.: 2*7008C P4,2*7002C P4...