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)

Desertcart Logo

We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Our Other Brands:Hewyn|Selfship

Reviews

J**E

We like this the rpm is accurate and it has good torque for its size

9.07.2022

R**.

Perfetto per fare aprire e chiudere una porta da esterno con un telecomando e messo fine corsa in apertura e chiusura, lo consiglio vivamente .

27.05.2025

A**D

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

M**Y

just like as described in the photos and description. works for me.

14.09.2024

M**.

Product is ok but Amazon left the package at the bottom of our steps rather than walking the extra 5 yards to deliver to the porch of our door. If I hadn't been around before it rained then the package would have been ruined. Poor delivery service.

9.03.2026

ASIN	B0745VWJ54
ASIN	B0745VWJ54
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#12,378 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Electric Fan Motors
Color	1000 RPM
Customer Reviews	4.6 4.6 out of 5 stars (1,571)
Customer reviews	4.6 4.6 out of 5 stars (1,571)
Cutting Diameter	37 Millimeters
Date First Available	1 January 2024
Date First Available	1 January 2024
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	200 g
Item diameter	37 Millimeters
Item model number	Greartisan
Item model number	Greartisan
Manufacturer	Greartisan
Manufacturer	Greartisan
Material	Metal
Part number	Greartisan
Product Dimensions	3.63 x 3.63 x 3.33 cm; 200 g
Size	24 Volt
Speed	10 RPM
Voltage	24 Volts

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

Details

Description

Specifications

Reviews

Common Questions