BMT — three-phase motors, aluminium frame
Three-phase IEC motors in aluminium frames 56 to 160, IE1 / IE3 / IE4, 0.09 – 22 kW.
The BMT series covers the general-purpose three-phase range in a light, corrosion-resistant die-cast aluminium frame. It is available in IE1, IE3 and IE4 efficiency classes, in 2, 4, 6 and 8-pole versions, with foot, flange and combined mountings. IE3 and IE4 motors are fitted with a PTC thermistor.
Key characteristics
Pumps, fans, conveyors, packaging and general machinery where weight and corrosion resistance matter.
- Totally enclosed, fan-cooled (IP55, IC411) with a bi-directional fan
- Insulation class F, temperature rise class B
- Sealed 2RZ C3 bearings, lubricated for life
- Terminal box on top with six terminals; cable entry on either side
- Suitable for inverter supply (forced ventilation available as an option)
- PTC thermistor fitted on IE3 and IE4 motors
Available range
| Efficiency class | Poles | rpm | Power range | Frame sizes |
|---|---|---|---|---|
| IE1 | 2, 4, 6, 8 | 3000 / 1500 / 1000 / 750 | 0.09 – 22 kW | 56 – 160 |
| IE3 | 2, 4, 6 | 3000 / 1500 / 1000 | 0.12 – 22 kW | 63 – 160 |
| IE4 | 2, 4, 6, 8 | 3000 / 1500 / 1000 / 750 | 0.12 – 18.5 kW | 63 – 160 |
Technical specification
| Supply | 3~ |
|---|---|
| Frame material | aluminium |
| IEC frame sizes | 56 – 160 |
| Rated power (kW) | 0.09 – 22 |
| Poles | 2, 4, 6, 8 |
| Efficiency classes | IE1, IE3, IE4 |
| Protection (IP) | IP55 |
| Cooling (IC) | IC411 |
| Insulation class | F |
| Temperature rise | B |
| Duty | S1 |
| Voltage / frequency | 400 V · 50 Hz (standard); special voltages on request |
| Mounting | B3, B5, B14, B3/B5, B3/B14 |
| Bearings | 2RZ C3 sealed, lubricated for life (20 000 h) |
| Standards | IEC 60034-1, -5, -6, -7, -8, -9, -14, -30-1; IEC 60072; IEC 60085; RoHS 2002/95/CE |
Mounting arrangements
B3, B5, B14, B3/B5, B3/B14
- B3Foot-mounted
- B5Large flange
- B14Small flange
- B3/B5Feet + large flange
- B3/B14Feet + small flange
Technical downloads
3D / CAD models
3D models (STEP) and 2D drawings are available for every BMT variant on our distributor's product pages. Downloading requires a free customer account.
Typical applications
General machinery
Production machines and assembly lines running for long periods: three-phase BMT and BCT motors, worm gearboxes with pre-stage for low speeds.
Packaging
Conveyors, filling, wrapping and labelling machines: BMT motors with BG or BV gearboxes for compact right-angle drives.
Assembly and disassembly
Modular gearbox configurations and accessories simplify integration and servicing.
Maintenance and replacement
IEC-standard dimensions and mountings allow Bernati motors to replace existing IEC motors of the same frame size.
Related Bernati ranges
three-phase motors, cast-iron frame
Three-phase IEC motors in cast-iron frames 80 to 315, IE3 / IE4, 0.75 – 200 kW.
- IEC frame sizes80 – 315
- Rated power (kW)0.75 – 200
- Efficiency classesIE3, IE4
three-phase brake motors, aluminium frame
Three-phase motors with an electromagnetic DC brake, frames 63 to 160, 0.09 – 18.5 kW.
- IEC frame sizes63 – 160
- Rated power (kW)0.09 – 18.5
- Poles2, 4, 6
worm gearboxes, square housing
Square worm gear reducers, sizes 025 to 150, ratios 7.5 to 100, up to 1 610 Nm.
- Sizes025 – 150
- Reduction ratios7.5 – 100
- Output torque≤ 1 610 Nm
worm gearboxes, compact housing
Compact worm gear reducers, sizes 030 to 090, ratios 7 to 100, up to 350 Nm.
- Sizes030 – 090
- Reduction ratios7 – 100
- Output torque≤ 350 Nm