NEMA Frame 56 Three Phase Motor 0.75kW/1HP with C-Type Flange
NEMA Frame 56 vs IEC Frame — What Is the Difference?
Australia uses IEC metric frames as the default standard. However, equipment manufactured in the United States and Canada uses NEMA imperial frames with different mounting bolt patterns, shaft diameters, and flange dimensions. If you need to replace or upgrade a motor on American-made pressure washers, irrigation pumps, grain augers, or commercial mixers, you need a NEMA-frame motor — an IEC motor will not bolt on directly.
| Feature | NEMA Frame 56 (This Motor) | IEC Frame 90 (Equivalent Power) |
|---|---|---|
| Shaft Diameter | 5/8" (15.87 mm) | 24 mm |
| Shaft Height | 3.5" (88.9 mm) | 90 mm (3.54") |
| Mounting Standard | NEMA C-flange / 4-bolt square | IEC B3 foot / B5/B14 flange |
| Bolt Pattern | 2.625" × 2.625" (66.7 mm) | IEC 90 bolt circle: 100 mm |
| Frame Material | Rolled steel (standard NEMA 56) | Cast iron or aluminium |
| Typical Application | US/Canadian OEM equipment | Australian and European equipment |
Technical Specifications
| Parameter | Value |
|---|---|
| Rated Power | 0.75 kW / 1 HP |
| Voltage | 240 V / 415 V (dual voltage, Y/△ configurable) |
| Phase | Three-phase |
| Speed | 1,400 RPM (4-pole, 50 Hz) |
| Frame | NEMA 56 (rolled steel) |
| Flange Type | NEMA C-type (square 4-bolt) |
| Shaft Size | 5/8" (15.87 mm) |
| Enclosure | TEFC (Totally Enclosed Fan Cooled) |
| IP Rating | IP55 (dust-tight, jet-water resistant) |
| Insulation Class | Class F |
| Reversible | Yes (by swapping any two phase connections) |
| VSD Compatible | Yes |
| Warranty | 1 year |
Common Applications for NEMA Frame 56 Motors
- American-brand pressure washers — most US commercial washers use a 56C direct-drive or close-coupled mount with 5/8" shaft
- Irrigation pumps (US OEM) — centrifugal pumps from North American manufacturers specify NEMA 56C frame
- Commercial food mixers — US/Canadian kitchen equipment (Hobart, Globe) use NEMA 56C motors
- Workshop grinders and small compressors — older North American machinery with NEMA square-mount base
- Grain augers and conveyor drives — agricultural equipment imported from Canada
NEMA Flange Motor FAQ
What is a NEMA C-type flange and how does it differ from IEC B5/B14?
A NEMA C-type flange is a square 4-bolt mounting pattern used on American and Canadian industrial equipment. It has a 2.625" × 2.625" bolt circle with a 5/8" (15.87mm) shaft. IEC B5 and B14 flanges are metric circular bolt patterns — 100mm bolt circle for Frame 90 — with a 24mm shaft. The two standards are not interchangeable without an adapter plate.
Can this motor run on Australian 240V single phase supply?
No — this is a three-phase motor. It requires a three-phase 415V supply, or a single-phase 240V VFD to convert domestic power to three-phase output. If you need to run it from a standard 240V single-phase circuit, pair it with one of HankeMotor's 0.75kW or 1.5kW Folinn VFD inverter drives, available separately.
How do I know if my equipment needs a NEMA Frame 56 motor?
Check the original motor nameplate or equipment manual for the frame number. If it says "Frame 56", "56C", or "NEMA 56", this motor is a direct replacement. You can also measure the shaft diameter — NEMA 56 uses a 5/8" (15.87mm) shaft, while IEC Frame 90 uses 24mm. If the shaft is closer to 16mm, it is likely NEMA 56.
Is this motor compatible with a variable speed drive (VFD)?
Yes. This TEFC three-phase motor is VSD/VFD compatible. For operation below 30 Hz for extended periods, ensure the motor is not overloaded — the fan cooling efficiency reduces at low speed. For low-speed continuous duty, consider a motor with forced external ventilation or derate the load to 70–80% at speeds below 25 Hz.
What is the dual voltage 240V/415V setting?
This motor has 6 terminal leads in the terminal box, allowing connection in star (Y) for 415V three-phase, or delta (△) for 240V three-phase. Most Australian three-phase supplies run at 415V, so standard installation uses the star connection. The delta connection is used when running from a single-phase VFD outputting 240V three-phase.