Skip Content

Applied Filters Clear All

Brand

Motors

Smart Motor Management Solutions
When operations go down, you want reliable replacement motors to restore operations quickly. We have a wide selection of general-purpose, definite-purpose and HVAC motors to meet your needs.

General-Purpose Motors



Definite-Purpose Motors



HVAC Motors



Motor Supplies



TripleGuard

Related Information

Motors Q&A

Motors
(127 Questions : 156 Answers)

Ask your questions. Share your answers.

 
 
« Back
 
 
The transformer doesn't change the AC cycles.
Field of Industry:: manufacturing
Product used for:: motorized table
Years purchasing from Grainger:: 20?
2 years, 1 month ago
by
Read all my Q&A
 
Please wait while more information about Decimal is loaded.
Additional information about Decimal could not be loaded.
0points
1out of 2found this question helpful.
Was this helpful?helpful1unhelpful1
1 Person needs an answerI have this question too

Answers

Answer: 
If you connect the motor that way, you will have the correct voltage at the motor but the motor will still see the 60HZ. There are several more details that need to be discussed. It would be best to contact our Grainger Technical Support Team. With a little more info, we can advise you if that will be an effective arrangement.

Thanks for using Ask and Answer.
2 years, 1 month ago
by
Read all my Q&A
 
Please wait while more information about ThomasP is loaded.
Additional information about ThomasP could not be loaded.
+2points
2out of 2found this answer helpful.
Was this helpful?helpful2unhelpful0

Answer: 
All any motor cares about is a volt per hertz ratio. That being said, I am assuming you are stepping up 115 vac to 230 volt vac. The motor is going to run faster at 60 hertz than at 50 hertz. If the motor was rated for 1,500 rpm at 50 hertz, it will now rum 1,800 rpm. Depending on the application, you could very easily overload the motor because the Hp requirement at 1,500 rpm is very different than the HP requirement at 1,800 rpm. This is especially true for pumps and fans. You will need to change pulleys to keep the gearing thesame.
Age: 45 to 54
2 years ago
by
Read all my Q&A
 
Please wait while more information about bobbyonthego is loaded.
Additional information about bobbyonthego could not be loaded.
+6points
6out of 6found this answer helpful.
Was this helpful?helpful6unhelpful0

Answer: 
The motor will run faster than nameplate
1 year, 10 months ago
by
Read all my Q&A
 
Please wait while more information about mateo14 is loaded.
Additional information about mateo14 could not be loaded.
+1point
1out of 1found this answer helpful.
Was this helpful?helpful1unhelpful0

Answer: 
it will run about 7 percent faster at 60 hz than the name plate rpm
1 year, 3 months ago
by
Read all my Q&A
 
Please wait while more information about MrLee is loaded.
Additional information about MrLee could not be loaded.
0points
2out of 4found this answer helpful.
Was this helpful?helpful2unhelpful2
What are the differences between a air compressor rated motor vs a farm duty rated motor? I have a 5hp motor with a 184T frame, single phase, 1740 rpm and its for a Quicy air compressor. Just wondered if you could give me some specifics.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about CompressorMan is loaded.
Additional information about CompressorMan could not be loaded.
+6points
6out of 6found this question helpful.
Was this helpful?helpful6unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
Farm duty motors are specially designed for farm duty applications requiring high starting torque and moderate starting current. Standard features include v-ring slinger on drive end and opposite drive end, reversible shaft rotation, and manual overload protection for operator safety.
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.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about mateo14 is loaded.
Additional information about mateo14 could not be loaded.
+1point
2out of 3found this answer helpful.
Was this helpful?helpful2unhelpful1

Answer: 
It has to do with duty cycle, and the environment things are going to be used in.

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.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about Phil is loaded.
Additional information about Phil could not be loaded.
+3points
4out of 5found this answer helpful.
Was this helpful?helpful4unhelpful1

Answer: 
Air compressor motors, like the ones on your furnace blower, have a higher service factor (SF); typically 1.25 VS 1.00 or 1.15 for other motors.
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!
1 month, 3 weeks ago
by
Read all my Q&A
 
Please wait while more information about phanfxr is loaded.
Additional information about phanfxr could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Answer: 
A farm rated motor is designed for high staring torque like a silo unloader to get it started.Then the torque requirements are less..The standred motor has lower starting torque ,but as the compressor builds pressure the torque requirements increase. so it is designed to handle the added load as the compressor increases its pressure drawing less amps So a farm rated motor vs a standred motor with the same pulley will draw higher amperage on the top side of the pressure cycle approx 10-15 % You can use a farm rate on a compressor if you use a drive pulley that is 15-20% smaller in dia if you choose to go that way use a amp meter to measure amps on the top end of the cycle If your top end amps approx 28 are within the guidelines your good to go ..Your pulley will be around 6.5in at 150 psi..
6 months ago
by
Read all my Q&A
 
Please wait while more information about fieldserman76 is loaded.
Additional information about fieldserman76 could not be loaded.
0points
1out of 2found this answer helpful.
Was this helpful?helpful1unhelpful1
2 years, 3 months ago
by
Read all my Q&A
 
Please wait while more information about tumbler is loaded.
Additional information about tumbler could not be loaded.
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
Hello,
This type of gear motor requires some more info, we do not currently carry a stock 1/2 HP gear motor.
Thanks for choosing Grainger Ask & Answer.
Gender: Male
Age: 55 to 64
2 years, 3 months ago
by
Lincolnshire, IL, USA
Read all my Q&A
 
Please wait while more information about Wade is loaded.
Additional information about Wade could not be loaded.
-4points
0out of 4found this answer helpful.
Was this helpful?helpful0unhelpful4

Answer: 
We currently do not have a gearmotor with those two specifications. There are several options that may work though. I suggest giving Grainger Technical Support a call so a specialist can make suggestions so you can know all of your possible options.

Thanks for using Ask & Answer.

Disclaimer:

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.
Gender: Male
Age: 55 to 64
2 years, 2 months ago
by
Lincolnshire, IL, USA
Read all my Q&A
 
Please wait while more information about MotorTechPlus is loaded.
Additional information about MotorTechPlus could not be loaded.
-1point
0out of 1found this answer helpful.
Was this helpful?helpful0unhelpful1

Answer: 
There are permanent magnet (PM) DC gear motors which are better suited for this low RPM. BALDOR manufactures these fractional horsepower gear motors AND matching power supplies which will 'plug in' to your 115/120Vac single phase, and 'convert' to 90Vdc.
The drive/power supply also has a speed & torque control so you can set up the best output RPM & torque for your process.
2 months, 3 weeks ago
by
Read all my Q&A
 
Please wait while more information about phanfxr is loaded.
Additional information about phanfxr could not be loaded.
+2points
2out of 2found this answer helpful.
Was this helpful?helpful2unhelpful0
1 year, 9 months ago
by
Read all my Q&A
 
Please wait while more information about jjjjj is loaded.
Additional information about jjjjj could not be loaded.
+1point
3out of 5found this question helpful.
Was this helpful?helpful3unhelpful2
1 Person needs an answerI have this question too

Answers

Answer: 
The mention of motor shaft rotation for electric motors is referencing the shaft end unless otherwise specified. CCWSE means counter clock-wise shaft end orientation. CCWLE means the shaft turns counter clock-wise lead end, meaning the side of the motor where leads exit the motor will rotate CCW.

Thanks for using Ask & Answer.
1 year, 9 months ago
by
Read all my Q&A
 
Please wait while more information about ThomasP is loaded.
Additional information about ThomasP could not be loaded.
+2points
8out of 14found this answer helpful.
Was this helpful?helpful8unhelpful6

Answer: 
The rotation of a motor is usually on the nameplate if it is a single phase motor. On a three phase motor, there is a tester available to determine the motor rotation. You look at the motor from the drive end.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about mateo14 is loaded.
Additional information about mateo14 could not be loaded.
+4points
6out of 8found this answer helpful.
Was this helpful?helpful6unhelpful2

Answer: 
If you're doing a new installation, "Bump Test" the connected (not coupled# motor & see which way it rotates. You can reverse the direction of rotation by reconnecting some of the leads #on a single-phase motor; check the wiring diagram#, or changing just two leads #phase connections) on a three-phase motor.

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.
1 month, 3 weeks ago
by
Read all my Q&A
 
Please wait while more information about oldmarine12 is loaded.
Additional information about oldmarine12 could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
Can motor direction be changed, if so, how?
Thank you
2 years ago
by
Read all my Q&A
 
Please wait while more information about Heintz76 is loaded.
Additional information about Heintz76 could not be loaded.
-1point
0out of 1found this question helpful.
Was this helpful?helpful0unhelpful1
2 People need an answerI have this question too

Answers

Answer: 
The direction of this motor can not be changed.

Thanks for using Ask & Answer.
2 years ago
by
Read all my Q&A
 
Please wait while more information about ThomasP is loaded.
Additional information about ThomasP could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Answer: 
No. If a motor direction is reversible, the description will specify that.
Age: 25 to 34
2 years ago
by
Read all my Q&A
 
Please wait while more information about Phil is loaded.
Additional information about Phil could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
My old Emerson Electric 30" whole house fan has a 1/2 hp motor and is rated 5550 CFM. The Dayton 30" whole house fan has a 1/3 hp motor and is rated 7600 high/ 5100 low. (1) are motors today more powerful? (2) could I get a 1/2 hp motor on the 30" Dayton unit? (The old Emerson unit needs to be replaced.)
1 year, 11 months ago
by
Anonymous
+2points
2out of 2found this question helpful.
Was this helpful?helpful2unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
Motors are not more powerful today. A 1/2 HP motor today is pretty much the same as a 1/2 HP motor was years ago. But some of the engineers are sharper today. That is how this unit moves more air, it is all in the design. There is no need to replace the motor. Just enjoy the higher efficiency and cost savings.

Thanks for using Ask & Answer.
1 year, 11 months ago
by
Read all my Q&A
 
Please wait while more information about ThomasP is loaded.
Additional information about ThomasP could not be loaded.
+3points
3out of 3found this answer helpful.
Was this helpful?helpful3unhelpful0

Answer: 
Note: No one from Grainger reads these questions, they are trying to get other people to answer your questions. I don't work for them, but I do work with motors. Take my advice with a grain of salt.

Fan blade design has probably improved somewhat over the years, allowing a smaller motor to move more air. Alternatively, Emerson may have just chosen to use a bigger motor so it wouldn't operate as hard, and would last longer.

As far as your question 1, no. A HP is a HP.
on Q2, possibly. You would need to find a cross referenced motor, or find a motor that matches the physical dimensions, shaft diameter / length, and mounting style as the OEM motor.

Best thing to do is to get a model and serial number off of the motor, and either call grainger, or another motor distributor. If you call Grainger, they will put you on the line with a tech support person, who can help you cross to a new motor. Give them the number, and if it wasn't a custom motor, they should be able to cross it for you. If it was a custom motor, you will have to order direct from Emerson, or just replace the whole thing.
1 year, 11 months ago
by
Read all my Q&A
 
Please wait while more information about Phil is loaded.
Additional information about Phil could not be loaded.
+2points
3out of 4found this answer helpful.
Was this helpful?helpful3unhelpful1
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about JAYE is loaded.
Additional information about JAYE could not be loaded.
+3points
3out of 3found this question helpful.
Was this helpful?helpful3unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
A single-phase motor that consists of a running winding, starting winding, and centrifugal switch. The reactance difference in the windings creates separate phases, which produce the rotating magnetic field that starts the rotor.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about mateo14 is loaded.
Additional information about mateo14 could not be loaded.
+3points
3out of 3found this answer helpful.
Was this helpful?helpful3unhelpful0

Answer: 
A split phase motor is a motor with two separate sets of windings, and a means to switch between them.

An electric motor produces 100% torque at 0 RPM, and this is also when the motor draws the most power. In order for a motor to start turning when it is connected to a load, it needs a "kick". This comes from a set of windings called the starter windings. They are designed to draw a large amount of current through the motor, and also from a capacitor, to get the motor running. As soon as the motor reaches a set RPM, a set of swinging weights swing open due to the centripetal force, and activate a set of mechanical contacts that disconnects the starter windings, and switches over to the run windings. The "run" windings are designed to draw less current, and provide less torque, but can run at a 100% duty cycle without overheating.

You often find split phase motors on compressors, or really in any application where there is a large load that needs to get a kick to start.

Split phase motors are easy to identify at a glance because they usually have a capacitor housing right on the motor itself.

A little more from wikipedia:
There are five basic types of competing small induction motor: single-phase capacitor-start, capacitor-run, split-phase and shaded-pole types, and small polyphase induction motors.

A single-phase induction motor requires separate starting circuitry to provide a rotated field to the motor. The normal running windings within such a single-phase motor can cause the rotor to turn in either direction, so the starting circuit determines the operating direction.

In certain smaller single-phase motors, starting is done by mean of a shaded pole with a copper wire turn around part of the pole. The current induced in this turn lags behind the supply current, creating a delayed magnetic field around the shaded part of the pole face. This imparts sufficient rotational field energy to start the motor. These motors are typically used in applications such as desk fans and record players, as the required starting torque is low, and the low efficiency is tolerable relative to the reduced cost of the motor and starting method compared to other AC motor designs.

Larger single phase motors have a second stator winding fed with out-of-phase current; such currents may be created by feeding the winding through a capacitor or having it have different values of inductance and resistance from the main winding. In some designs, the second winding is disconnected once the motor is up to speed, usually either by a centrifugal switch acting on weights on the motor shaft or a thermistor which heats up and increases its resistance, reducing the current through the second winding to an insignificant level. Other designs keep the second winding on when running, improving torque.

Self-starting polyphase induction motors produce torque even at standstill. Available cage induction motor starting methods include direct-on-line starting, reduced-voltage reactor or auto-transformer starting, star-delta starting or, increasingly, new solid-state soft assemblies and, of course, VFDs.[29]

Polyphase motors have rotor bars shaped to give different speed-torque characteristics. The current distribution within the rotor bars varies depending on the frequency of the induced current. At standstill, the rotor current is the same frequency as the stator current, and tends to travel at the outermost parts of the cage rotor bars (by skin effect). The different bar shapes can give usefully different speed-torque characteristics as well as some control over the inrush current at startup.

In wound rotor motors, rotor circuit connection through slip rings to external resistances allows change of speed-torque characteristics for acceleration control and speed control purposes.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about Phil is loaded.
Additional information about Phil could not be loaded.
+16points
16out of 16found this answer helpful.
Was this helpful?helpful16unhelpful0
i want to couple that motor with a foam pump.
Field of Industry:: fire truck
2 years, 1 month ago
by
Read all my Q&A
 
Please wait while more information about leonnardy is loaded.
Additional information about leonnardy could not be loaded.
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
We do not have a 2HP, single phase motor in a hazardous location type at this time.

Thanks for using Ask & Answer.
1 year, 9 months ago
by
Read all my Q&A
 
Please wait while more information about ThomasP is loaded.
Additional information about ThomasP could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Answer: 
You need to know what the FRAME is for this motor; it should be on the nameplate (e.g. 56C, 145TC, etc.) if it's a domestic/US make. If it's a metric frame, it will be something like 112M, 132S, etc.

The best way to try & match this up electrically, mechanically and physically from a local supplier like WW Grainger is to bring the motor in so their applications specialists can check the motor & nameplate.

If the motor is what's called an OEM (Original Equipment Manufacture), you may be stuck calling whoever built the foam pump.
1 month, 3 weeks ago
by
Read all my Q&A
 
Please wait while more information about oldmarine12 is loaded.
Additional information about oldmarine12 could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about Remy is loaded.
Additional information about Remy could not be loaded.
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
In order to better assist you we will need additional information. Please call 1-800-Grainger Monday-Friday 7AM-7PM to speak with a Technical Product Support Specialist.
1 year, 5 months ago
by
Read all my Q&A
 
Please wait while more information about AngieO is loaded.
Additional information about AngieO could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Answer: 
Check your nameplate; if the motor carries the 208Volt rating, the starting & breakdown torque is the SAME as for the 230Volt connection.

The difference is your starting and running CURRENT; it will be approximately 20% higher at the 208Volt connection, so you may have to change or adjust your overload protection.
1 month, 3 weeks ago
by
Read all my Q&A
 
Please wait while more information about oldmarine12 is loaded.
Additional information about oldmarine12 could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
old model # 3-20-6z075 new is just 6z075.Every thing else is the same . Thank you
6 months ago
by
Read all my Q&A
 
Please wait while more information about Dauby is loaded.
Additional information about Dauby could not be loaded.
0points
0out of 0found this question helpful.
Was this helpful?helpful0unhelpful0
1 Person needs an answerI have this question too

Answers

Answer: 
The different ratios relate to a theoretical RPM difference of 0.01. There will be no noticeable difference in performance and operation based on that minor difference in gear ratios.

Thank you for using Grainger Ask & Answer.
6 months ago
by
Read all my Q&A
 
Please wait while more information about ThomasP is loaded.
Additional information about ThomasP could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0

Answer: 
I don't know how you were able to get the replacement gear ratio that close, but that's almost perfect and you're good to go.
1 month, 3 weeks ago
by
Read all my Q&A
 
Please wait while more information about oldmarine12 is loaded.
Additional information about oldmarine12 could not be loaded.
0points
0out of 0found this answer helpful.
Was this helpful?helpful0unhelpful0
2 3 4 5next>>
2 3 4 5next>>