CNC Air Cooling Square Spindle for diy

We are offering cnc air cooling square spindle.
Sinjoe cnc router spindle gdz120*103-4.5 with 4500w and max 18000rpm.
Imported materials spindle with air cooling way.suit for various types of advertising and engraving machine, mold engraving and milling machine, cnc machining centers, cnc milling machine grinder, power high-speed centrifuge
specifications:
bearing type: 2×7008c p4+2×7004c p4
max torque: 2.45nm
max speed: 18000 rev min
max frequency: 300hz
rated voltage: 380v
radial runout: 0.01mm (10 microns that is, less than one wire)
axis degree: 0.025mm (2.5 microns)
clamping diameter: er32 collet, standard configuration 6mm
nut model: er32-a-type
collet nut : 3.175mm,6mm,12.7mm,20mm
speed mode: 0-18000 stepless speed control can be achieved through the inverter to adjust the output voltage and operating frequency.
Cooling mode: air cooling mode
diameter: 103mm
lubrication: high temperature grease