120x120x38mm AC Axial Fan with metal impeller

General Specifications
1) Motor structure: shaded pole motor inducted by running eternal rotor, with design of ultra temperature protection.
2) Operation System: Double high precise ball bearing.
3) Insulation resistance: Over 100 M Ω tested by a resistor at DC 500V
4) Insulating grade: F; protecting grade: IP54
5) Dielectric withstand voltage: AC 1800V, at 0.5mA, 50/60Hz
6) Allowable ambient temperature range: -25℃ - +75℃ (ball bearing) under un-concretionary state.

Material
Casing: Die-casting aluminium Alloy. With anti-corrosion treatment.
Impeller: Stricked out from metal armor plate, impellers are welded to motor rotor directly. Surface is finished to be anti-corrosion by cathode electrophoresis.
Bearig: Ball bearing

Technical Parameter