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Commercial and Industrial Motors
Shop for all your industrial, commercial and specialty motors at Grainger. You'll find plenty of general-purpose three-phase motors to use where a more compact size and less vibration is needed. You can find the specific farm-duty, HVAC or vacuum motor you need here, too. And Grainger carries motor supplies like capacitors and DC speed controls to keep your business moving.
Most Popular Motor Products
- DAYTONItem # 6K778
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Different motors are designed to operate for different periods of time, and in different conditions. For instance, the fan motor in your bathroom is designed to operate for 15 minutes an hour or so a day, and in a high-humidity area, but with no airborne dust / grit, and no splashing / directed water. It's duty cycle is probably something like .15, and it is "open frame", meaning that there is no protection from environmental contaminants.
1.0 is considered constant operation. A motor that starts, and keeps running for at least an hour at a time. This would be a motor like the one in a commercial cooler, where a fan is pushing air throughout the cooler 24/7.
1.x duty motors (farm duty is in this) are motors that are designed to be able to start and stop frequently, as well as run for hours on end. A motor draws the most power when it is starting up, and because of this, more stress is put on a motor during repeated starts and stops, especially if there is a large initial torque requirement.
A motor for an air compressor is going to have to be able to handle high initial torque, frequent starts and stops, and long run times, just like a farm duty motor. The main difference is that your air compressor motor doesn't need to be designed to handle environmental issues. Farm rated motors are more likely to be TEFC type, whereas your air compressor motor is more likely to be an open frame motor.
So, if you need to replace the air compressor motor, a farm rated motor should work, but I wouldn't go the other way, unless you can provide a degree of protection from environmental contaminants.
A compressor duty motor is more robust, with high starting torque and heavier start windings, to handle the extra heat from continuous high load operations.
The reason for this is the frequent (start/stop or on/off) duty cycle of compressors & furnace blowers.
You can put in a motor with a 'lower' service factor in your application; the horsepower, speed, voltage, frame & enclosure are more important.
Bring your old motor in for an expert analysis!
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If you're trying to describe if a motor rotates CW or CCW, look at the end of the motor shaft dead-on, and use that as your reference for CW or CCW rotation.
This type of gear motor requires some more info, we do not currently carry a stock 1/2 HP gear motor.
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The source for the answers given by Grainger in Ask and Answer are based on the information provided with the question, which may not be complete or may not apply to other situations, and based on product literature and informational materials, the content of which is provided by Grainger’s product suppliers. Grainger disclaims liability for any information it provides in Ask and Answer which later may be alleged or determined by a court of law to be inaccurate or incorrect. The answers given by Grainger in Ask and Answer are not intended to replace or supplement any professional, engineering or other consultation services available to its product users. Always read, understand, and follow the product information and instructions provided by the manufacturer.
The drive/power supply also has a speed & torque control so you can set up the best output RPM & torque for your process.
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Input 115 / 230V~, 60 Hz, 1 Phase
HP 1 1/2
Frame NEMA 56 The motor starts when there is no load but under load it only hums I cannot read the ratings for the capacitor but I believe it states cbb65a-1 80uf +-5% 250 vav 50/60 hz.Can you help me selecting the correct capacitor
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As long as the motor's rotation can be electrically reversed, the correct relays/starters and switches in their correct spots will do the trick for you.
The problem with using ANY motor with a 'Variable Frequency Drive' is removing the excess operational heat from the motor's interior during extended below base speed operation.
Drip-proof Open motors deal with the problem better than 'Fan Cooled' motors because the DP design has a free exchange of outside air and is not dependent on an 'opposite shaft end' fan to cool the motor frame.
If you check a motor catalog, some of your larger horsepower, 460Vac 'VFD' motor ratings are built with an electric ventilator fan, which operates continuously and independently of the motor shaft.
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The source for the answers given by Grainger in Ask and Answer are based on the information provided with the question, which may not be complete or may not apply to other situations, and based on product literature and informational materials, the content of which is provided by Grainger's product suppliers. Grainger disclaims liability for any information it provides in Ask and Answer which later may be alleged or determined by a court of law to be inaccurate or incorrect.
The answers given by Grainger in Ask and Answer are not intended to replace or supplement any professional, engineering or other consultation services available to its product users. Always read, understand, and follow the product information and instructions provided by the manufacturer. same on category AAA as well