AC Fan Motor

AC fan motor guides covering shaded-pole, PSC and three-phase induction motors, run capacitors, insulation class and replacement practice.

AC axial fan qualified for vertical and horizontal fan mounting orientation
By longwell / July 30, 2026 / Engineering Case Studies

Shaft Up, Shaft Sideways: the Fan Has to Survive Both

Most specifications never mention which way the fan will point. This o...

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A 900mm axial fan re-engineered for 50 Hz to 60 Hz grid conversion
By longwell / July 29, 2026 / Engineering Case Studies

Moving a 900mm Fan From 50 Hz to 60 Hz Is Not a Sticker Change

The customer wanted their proven 50 Hz fan for a 60 Hz market. The imp...

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Forward-curved blower housing from low-volume tooling, 150 units a year
By longwell / July 27, 2026 / Engineering Case Studies

A Custom Stamping Die for 150 Fans a Year

Tooling economics usually assume volume. This customer commissioned a ...

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By longwell / July 25, 2026 / Engineering Case Studies

The Fan Sits Millimetres From a 1000-Watt Heater

Buy a fan and a heater separately and someone still owns the gap betwe...

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Fan filter kit adapting a 120mm axial fan to a 150mm cabinet cutout
By longwell / July 25, 2026 / Engineering Case Studies

The Cutout Is the Requirement, Not the Fan

The customer asked for a 150mm fan that barely exists. What their cabi...

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Cross-flow fan under fan quality inspection against drawing criteria
By longwell / July 10, 2026 / Engineering Case Studies

No Rust, No Burrs, No Gaps: the Drawing Said So

Most drawings specify what the fan does. This one also specified what ...

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longwell-wi-6985126398-project
By longwell / May 8, 2026 / Engineering Case Studies

HVAC Motor Vibration Isolator Replacement Project

See how Longwell reverse-engineered a 1,000-piece replacement motor vi...

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longwell-wi-6985032542-project
By longwell / May 8, 2026 / Engineering Case Studies

Retrofit a 450mm AC Centrifugal Fan for 70°C Heat

Learn how we retrofitted a 450mm AC centrifugal fan to deliver 4500 m3...

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longwell-lwca-60240sn-06-proje
By longwell / April 30, 2026 / Engineering Case Studies

Custom AC Cross Flow Fan for Tight Square Enclosures

Learn how we customized an AC cross flow fan with a square housing and...

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longwell-wi-6979294887-project
By longwell / April 27, 2026 / Engineering Case Studies

210mm Axial Fan Assembly: Downsizing an AC Motor

We replaced an oversized 60W motor with a 25W unit in a 210mm axial fa...

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