So if I have an average rpm of 100 rpm and the rates torque is .45 kgcm, does that mean this has a power output of 4000 Watts?

I know this answer is coming to you 3 years too late - and you probably figured this all out. Just in case - here is how you can calculate the power from the torque and RPM. A couple of quick notes: Torque is force times length - kg is not a force but a mass. If the "torque" is given in kg*cm - then this is not a proper torque number. It should be in Newton*cm. Newton is the unit for force and kg for mass. The force a mass experiences here on earth is the mass multiplied by the earth's acceleration of the mass in the earth's gravity. This acceleration is 9.81 m/s/s (meters per seconds squared). This unit is the same as N/kg (not that readily visible - but for now we'll just accept that as correct). Now we can calculate the proper torque by multiplying the two numbers: 4.5kg*cm * 9.81 N/kg = 44.2 N*cm. Power is work done per time - work, energy and torque are identical units of measure - force times length - the continuously delivered torque is the same as the work done by the motor. However, for the power to be correct we have to express work in N*m (SI units) - not N*cm. So we have translate N*cm into N*m. 100 cm = 1 m or 1cm = 0.01 m. We can just simply replace the cm with 0.01m and well get the torque (work) in N*m - 4.42N* 0.01m = 0.442 N*m. Next: power is Nm/s in SI units - that means we have to express 100 rpm in rps (revolutions per second = rev/sec). 1 min = 60 seconds. 100 rpm = 100 revs per 60 secs = 100/60 rps = 1.7 rps. Now we can calculate the power in N*m/s: 0.442N*m * 1.7 rps = 0.74N * m / s = 0.74W of mechanical power - which is even less power. Of course that's only correct if the 4.5kgcm number is correct for the motor. Some of the suggestions were to use the electrical power of the motor to estimate the mechanical output power. That too is a legit approach - however, that power setting given must be under the same conditions for which the mechanical output was given. E.g. the motor must run at 100 rpm and deliver the torque given - only then the current draw by the motor and the voltage accross the motor can be used to calculate the approximate mechanical power. For example - if the motor draws 1A at 12V when stalled out (motor is slowed down to a stop), then this is not the same condition as running the motor at 100 rpm. Sometimes the specifications given for those products can be a bit questionable.

Can this fit into a 1/4” metal rod? With a shaft collar or something?

If you are widening a coupler and you can, use a drill press or milling machine. Be sure the setup is as rigid as possible. Use a "reamer" 1/4" in diameter if you can get one. They are special purpose tooling but get used all the time for this exact job. They cost a few dollars. Use very low speed or even turn the chuck by hand. Do not use a hand dill at full speed with a twist bit. I would rather use 400 grit sand paper or fine abrasive padding than any sort of standard drill and bit.

How many rotations does this motor make a minute

As stated on the label.... 100 revolutions per minute (rpm)

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Reviews

A**D

DC Motor Controller

Just received the PEMENOL Motor Speed Controller. Hooked it up to a 30V 10 A DC power supply to check it out. Powered up fine when I got the power supply hooked up. The LED display is easy to read. The unit output is switched by the control knob by pushing it in. There's an LED above the knob to indicate on or off. The knob has smooth indents as you turn it, indicating the PW percentage on the LED display. It goes from 0 to 100. Don't know what the PWM frequency is. I didn't hook it up to my oscilloscope. I ultimately wanted to use the controller for a 24V gear motor, but I tried it on several other DC motors first. I tried a regular 6V DC motor it was able to control the motor very smoothly up to 100% modulation, except at really low pulse widths. Probably just too short of a voltage on time for DC motor dynamics, not a problem with the controller itself. Next I hooked up my 24V DC gear motor that runs nominally at 1000 rpm and 24VDC. The motor controller was able to again control the speed smoothly from about 15 to 100% modulation. Looks like it will work great for adding speed control between a fixed DC power supply and a lot of DC motors. Very useful and easy to connect.

16.09.2020

J**E

Great value and utility

Great little motor, I bought the 1000 rpm 24V, I’m using a 30V power supply and it’s easy to adjust the speed by turning down the voltage. I’m using the motor to run a peristaltic pump for an oil test bench. I highly recommend these motors, I’ve bought several others and they seem to have consistent high quality.

1.07.2022

V**R

Good product

Worked lovely,thought it was smaller then the picture but still worked.id like to find one thats smaller that has faster rpm and torque power if possible

13.12.2019

M**X

Very nice

This is a very torquey motor that runs cool even under constant use. I paired it with a 40 tooth pulley and belt, and it moves right along at 1000RPM! Well worth the $$

3.07.2019

M**K

Hit or miss

I've used these motors before and they've been pretty good. The most recent one sounds like there's a chipped gear tooth or something going on. It also spins slower in one direction than the other which is concerning. The motor I'm referring to is 1000 rpm, the ones I've used in the past were higher reduction.

27.04.2025

M**C

Great motor

I have purchased three of these motors and they all work great. I recommend that you also purchased some heat shrink tubing to reinforce the connections after you solder the wires on. This will prevent them from fatiguing and break off.

21.01.2020

B**.

burnt

motor arc'd when power was placed to it, smoked.

8.03.2021

/**H

Great deal for the price.

Motor works great. There is a small amount of shaft play, so it's probably best to couple the shaft to a longer one with a bearing to reduce runout.

6.06.2018

P**G

Used for a vintage car heater.

15.07.2024

B**N

Its to run lights on a small traction engine

27.12.2023

S**S

Sehr solider DC Getriebemotor. Wenn man zwischen den Varianten auswählt steht immer das Gleiche Nenndrehmoment in der Beschreibung. Ich bitte dies anzupassen. Sonst bin ich sehr zufrieden mit dem Produkt

8.02.2026

T**G

No power whatsoever, I can stop the motor with just a little finger. No power or torque at 24v. Thrown straight in the bin. Doesn't even deserve 1 star.

18.05.2023

L**I

Il motoriduttore gira bene e ha una notevole velocità, così alta al punto che sono stato costretto nel mio progetto Arduino a limitare il massimo segnale PWM erogabile. Purtroppo la coppia è molto bassa, altro che 10kg di trascinamento a bassa velocità, con il segnale PWM sotto il valore 50 il motore non parte neanche. E' troppo poco potente per potersi muovere da solo a bassa velocità, devo testarlo con il carico sulla testa ma credo che possa avvolgere bene solo pickup chitarre elettriche, con un trasformatore di medie dimensioni va in crisi sicuro.

7.04.2025

ASIN	B0745VWJ54
Best Sellers Rank	#6,011 in Toys & Games ( See Top 100 in Toys & Games ) #10 in Hobby Remote & App Controlled Vehicle Parts
Brand	Greartisan
Date First Available	July 22, 2017
Is Discontinued By Manufacturer	No
Item Weight	7 ounces
Item model number	Greartisan
Manufacturer	Greartisan
Material	Metal
Model Name	gear
Product Dimensions	1.43"W x 1.31"H
Speed	1000 RPM
UPC	766330627132
Voltage	24 Volts

Greartisan DC 24V 1000RPM Gear Motor High Torque Electric Micro Speed Reduction Geared Motor Centric Output Shaft 37mm Diameter Gearbox

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