We will create robot with wheels but this robot can handle 10KG load. We will have two wheels and gear with motor …
Mr.Coleman do you think dis motor can ? Under are the specifications
Specifications:
Gearbox: Spur Gear
Rated Voltage: 6V (3 to 6V Range)
No-Load Current: 80mA
Rated Current: 380mA
No-load Speed: 77 RPM
Rated Speed: 65 RPM
Rated Torque: 1.95Kg-cm
Stall Torque: 10Kg-cm
Max Power: 2W
Weight: 100g
>>DC Gear Motor 6V 77RPM – SGM25-370
@Rechelle This should be the article you need: https://www.robotshop.com/blog/en/drive-motor-sizing-tool-9698
Hello Coleman! I am doing a thesis related to coreless dc motors. Many manufacturers say that the motor rpm is 50 000 to 60 000 rpm… is that real? otherwise what is it? because other webpages are saying 10 000 to 20 000 rpm which sounds much more logical… Could you please explain to me, I need help in this. thank you so much!
@Sadeq 50k-60k does seem a bit high, but anything is possible. You can get an idea by going to several manufacturer websites and seeing the rating. It’s hard to assume they will all be alike, but it gives you a good sample, and you will need to indicate as much.
hi sir my question is which dc motor gives max volt in minimum rpm ?
if suppose i have mechanism which convert mechanical energy (rotary motion) in to elecrical energy so which dc motor is gives max volt in mini rpm
@akshay You are referring to a generator. Many generators (wind or water based) still use gearing to speed up the rotation of the motor based on input. This also means a higher torque is required to rotate the gears and motor.
I am designing a robot that moves and shoots tennis balls at various speeds. I understand all the inputs required to figure out what dc motor specs are needed for the wheels that propel the robot, but how do I figure out the resistance, ie maximum torque, created by the tennis balls being squeezed through the counter rotating wheels that propel the ball forward after it drops down the chute? I know how much the ball gets squeezed because I know the distance between the counter rotating wheels but this is a force that is perpendicular to the wheels not tangential. Any ideas about how to calculate this would be appreciated.
@John Unfortunately that’s well beyond the scope of this article. You might consider creating a new topic on the RobotShop or Letsmakerobots forums.
What should be my motor specifications if my robot has two wheels(connected to two separate motors) and the maximum voltage(power supply) which I can give to the robot is 12V
@Nick Input whatever you know into the following tool to get an idea of the torque and RPM for each motor: https://www.robotshop.com/blog/en/drive-motor-sizing-tool-9698
Hi sir! Actually my doubt is how to control dc motor rpm or speed? Is there any kind of resistor I need to join for this? Actually I am doing simple lamp waterfall and I require minimum speed for this, because it will take water slowly.
@Shweta Normally you would use gearing for slow speeds. You can find inexpensive, low rpm geared motors: https://www.robotshop.com/en/gear-motors.html
HI SIR. Which dc motor should I use for my lower exoskeleton system,its 24V, for hips and knee?
@Mithun You really need to do a torque / force balance on your end in order to know the specs of the motor (torque, rpm, weight etc.). A powered exoskeleton project can be quite expensive as they need ultralight puck actuators which provide high torque.
Hello Mr. Benson, I would like to build a small scale weeder kind of thing which would actually dig surface to remove grass, weed etc., I have the mechanical side built. It weighs about half a kg. I am thinking of buying a DC geared motor the one with yellow rectangle motor. What would be the motor specification for this? Thanks in advance for your rely.
@RCSN We offer a few such motors and the specs are different for each. It’s best to contact us via the RobotShop Forum or support center with the product SKU(s) and we’ll be happy to help. Note that these are small hobby motors with not much torque.
how could i find combined load capacity of 4 dc gear motors with known torque of 2 Nm each???
@AQ The following formula should help: https://www.robotshop.com/blog/en/drive-motor-sizing-tutorial-3661
You can also work backwards using: https://www.robotshop.com/blog/en/drive-motor-sizing-tool-9698
Thanks really good explanation 
Sir, I am building a e vehicle with BLDC 2.2KW motor rated as 48V and 50A. Now I am planning to go with lithium ion. The controller I use has surge protection it says, Is it sufficient if my battery can supply only the rated current? I mean 50A( maximum continous dicharge of battery) ? And can we use lithium polymer for electric vehicles, Is it good to use?
