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If you are researching the 55 kW electric motor price for a pump, fan, compressor or conveyor line in your plant, you are in the right place. At HEM Motor we offer 55 kW three-phase asynchronous motors mostly in a 250 frame size, in 2-pole (3000 rpm) and 4-pole (1500 rpm) options, with a ready-stock sales approach. Reaching your motor directly from the manufacturer, with no extra link in the chain, affects both the price-performance balance and the delivery speed. On this page we explain pole and speed selection, IE3 and IE4 efficiency classes, starting methods and the fast quotation process in plain language.
55 kW is one of the most demanded mid-to-large power steps in Turkish industry. Cooling towers, large centrifugal pumps, screw compressors, crushing-screening plants and main drive conveyors all cluster around this rating. That is why stock depth and correct frame selection in a 55 kW motor are the most critical factors keeping your project schedule on track. To learn stock availability and the most suitable configuration for you, reach us through the HEM Motor electric motor prices page and get a fast quotation by sharing your requirement.
How Do Pole and Speed Selection Affect the 55 kW Motor Price?
The first thing to clarify when ordering a 55 kW motor is the pole count, that is, the speed. A 2-pole 55 kW motor runs around 3000 rpm and is preferred in high-speed centrifugal pumps and turbo compressors. A 4-pole 55 kW motor at 1500 rpm is the workhorse of conveyors, mixers, fans and general drives. The speed choice determines not only mechanical compatibility but also frame weight and therefore the price-performance balance.
| Pole / Speed | Typical Application | Key Feature |
|---|---|---|
| 2-pole (3000 rpm) | Centrifugal pump, turbo compressor, high-speed fan | Compact frame, high flow |
| 4-pole (1500 rpm) | Conveyor, mixer, AHU fan, general drive | Balanced torque, quiet running |
| 6-pole (1000 rpm) | Low-speed mixer, special process | High torque, gearless option |
If you are unsure which speed suits your line, simply share the speed value on your machine nameplate with us. You can find details in our guide on 2/4-pole and speed selection for 45, 55 and 75 kW motors, and review our pole selection article for high-power motors.
IE3 and IE4 Efficiency Class: Which 55 kW Motor Is Right for You?
In the 55 kW band the efficiency class sits at the heart of the purchase decision. By regulation, IE3 is the minimum standard at this rating; however, in continuous processes running long hours per day, the IE4 super premium efficiency class noticeably reduces the energy bill. As HEM Motor we can supply both our IE3 electric motors and our IE4 electric motors from stock.
- IE3 premium efficiency: Offers a balanced price-performance point for standard-shift or medium-intensity plants.
- IE4 super premium efficiency: Lowers total cost of ownership in three-shift, continuous-process or high-consumption lines.
- Copper winding and F/H insulation: At high powers like 55 kW, winding quality determines motor life and hot-ambient endurance.
To explore the efficiency class impact on energy cost and the transition decision in more depth, our part-load efficiency curve article and general electric motors guide category will be useful.
Starting a 55 kW Motor: Softstarter and VFD Options
During direct-on-line (DOL) starting of a 55 kW motor, the inrush current can strain the grid and generator. For this reason most plants in this power band run with a soft starter or a variable frequency drive (VFD). The correct starting method extends motor life and reduces mechanical shocks.
| Starting Method | Suitable Application | Advantage |
|---|---|---|
| Softstarter | Pump, fan, compressor | Low inrush, shock-free start |
| VFD (frequency inverter) | Variable-flow pump and fan | Speed control and energy saving |
| Star-delta | Drives starting unloaded or lightly loaded | Economical, classic solution |
In VFD operation, the winding insulation and bearing choice gain importance. To go deeper, we recommend our motor protection, thermal and fuse selection article and, for large-power planning, the high-power motor supply guide.
Mounting Type and Connection Dimensions: B3, B5, B35
A 55 kW motor sitting correctly on the machine depends on choosing the right mounting type. The foot-mounted (B3) frame is the classic solution bolted to the floor or a base, common in conveyors, fans and crushers. The flange-mounted (B5) frame keeps the shaft perfectly aligned in pump and reducer connections. B35 is a combined solution with both feet and a flange, and since it offers flexibility with a single stock code, it is highly preferred in replacement orders.
- B3 foot mounting: Fixed floor mounting; ideal for conveyors, fans and general drives.
- B5 flange mounting: Connects directly to a pump or reducer body; provides axial precision.
- B35 foot + flange: Combines both mounting options; offers stock flexibility and fast replacement.
If you are replacing your existing motor with a new one, sharing the old motor's foot-hole spacing, shaft diameter and flange size is enough for a correct replacement. To see the differences between connection types, review our B5 flange electric motors and B3 mounted electric motors pages.
Where the 55 kW Motor Is Most Used
The 55 kW power band serves a wide range of applications, from heavy industry to food plants. Selecting the right motor at this rating requires accounting not only for power but also for the application's duty type and ambient conditions. A continuously running centrifugal pump and a crusher that starts and stops frequently throughout the day are chosen with different priorities, even if both carry the same 55 kW label.
| Sector / Application | Typical Drive | Priority Feature |
|---|---|---|
| Water and wastewater | Large centrifugal pump, lift pump | High efficiency in continuous running |
| Mining and stone crushing | Crusher, screen, belt conveyor | High torque and robust bearings |
| HVAC and ventilation | AHU fan, exhaust fan | Quiet running, low vibration |
| Compressed air | Screw compressor | Thermal endurance under continuous load |
To determine the right power-speed combination for your application, review the options on our pump electric motors, compressor electric motors and stone crushing plant motors pages.
Ready-Stock Sales and Fast Quotation Process
Our biggest advantage in 55 kW motors is the flexibility of ready-stock sales. We take care to keep the most demanded 2- and 4-pole configurations available with B3 foot and B5 flange mounting options. This way your project schedule moves forward without being held up by motor lead time. You can view standard-frame motor options on our standard electric motors page.
To define your need, just three pieces of information are enough: power (55 kW), speed/pole and mounting type (B3, B5 or B35). With these three headings we offer you the most accurate price-performance recommendation and a fast quotation. Simply contact us to learn stock status and current electric motor prices.
Frequently Asked Questions
What factors determine the 55 kW electric motor price?
Pole count (speed), efficiency class (IE3/IE4), mounting type (B3/B5/B35) and requested options are the main factors. In ready-stock sales, since there is no extra supply link, the price-performance balance is often more favourable.
How quickly can I receive a 55 kW motor from stock?
We try to keep the most demanded 2- and 4-pole 55 kW configurations under a ready-stock approach. If the configuration is in stock, delivery is fast; cases requiring special options are clarified during the fast quotation stage.
Should I choose IE3 or IE4 in a 55 kW motor?
If your daily operating hours are high and you run a continuous process, IE4 super premium efficiency is more economical in the long run. For medium-intensity plants, IE3 is a balanced starting point.
Which frame size is used for a 55 kW motor?
55 kW motors are typically built in a 250 frame size; the frame detail may change with speed and efficiency class. For a correct replacement, simply share the nameplate data of your existing motor.
Is a softstarter mandatory for starting a 55 kW motor?
To limit grid or generator inrush current, a softstarter or VFD is strongly recommended at this power. We determine the most suitable starting method together during the fast quotation process.
To source the right 55 kW motor for your line at the best price-performance from stock, contact the HEM Motor team; send us your requirement and let us prepare a tailored fast quotation.