we require motors to drive small escalater belt, Motor specification5Nm plus14rpm direct connection to conveyor roller6-8mm shaft12 or 24 volts, we may need up to 10000 motors

Hi Dan! I would like to contact you by email to find out more and hopefully make you a proposal of a geared motor which will support your needs. Can you please drop me an email to john@motioncontrolproducts.com?
Thanks in advance, John

Hi Dan
Can you email me the full spec and we will then advise if we are able to offer
karentarr@aarewinds.co.uk
Karen Tarr

hi guys
im guessing being supplied from uk the prices will not be able to compete with asia i wish it was different .sorry dan

please mail me full spec and I will try to find the cheapest workingsolution.
regards (e-mail to danmihailuca@yahoo.com)

Hi Dan
I'm wih Faber and I cover you area in MD. We handle a couple of options that may make sense. I would like to either stop by to discuss or if you could send me the full specification, I can put together our best solution. Tdegaetano@faberinc.com

The application will drive the choice of gear motor. If you go with brush DC motors you will save money but have a lot of maintenance. If you go brushless it costs more but last much longer.

Many large production facilities will not allow brush motors on their property due to the maintenance nightmare. 1000 brush motors in a plant will put it out of business. If your product is going to small companies who will just have one or two brush motors it is usually not a problem.

Even with the low torque requirement gearing is still an issue. If this is a low duty cycle you can use plastic gears and very inexpensive gearboxes like Crouzet or Fuller. Think of the geared motors in vending machines. There are a bunch of manufacturers of these, Bing vending machine geared motors.

As the duty cycle or required life increases you get into more and more expensive motors and gearing. On the high end you could have a brushless with all hardened helical/hypoid gearing like Brother or Sumitomo. These are more for high cycle production environments.

If the duty cycle is low enough you can over torque the motors which can save a lot of money. There are many applications where if the motor runs more than a couple of minutes at one time it will burn up. The starter motor in a car and hospital bed actuators are a couple of examples.

The more detail you have about your application the better. Knowing exactly, in engineering terms, what your requirements are can save you a bunch of money.

Hi Dan, DOGA can customise to your exact requirements. email me at dan.woodrich@dogausa.com

I think Permanent Magnet Synchronous Motor (PMSM) which is an enhanced BLDC is the way to go. Similar motor is wildly used in Canada for injecting antifreeze into the natural gas well. These motor run at very low speed and it typically operated with solar panels. I remember that we bought 100 units for about US$250 each. PMSM need a controller to run it, and that will add another US$150 to it. So using a BLDC is expensive. Brushed Motor is a lot cheaper, but you need to consider how to control it to run at precisely 14 RPM. PMSM has no problem doing that.

Since a motor is a constant torque device it would take a rather large motor without a gear reduction to do this job. The application, before losses, is only 7 watt/.01 hp. If a motor rated at 2000 rpm was directly coupled to the roll it would have to be 1048 watt/1.4 hp to produce 5 Nm continuously.

I would guess a 25 watt/.033 hp motor rated at 2000 rpm and a 140:1 gearbox would cover the losses in most systems. Much like vending machine geared motors which are well under $50 each.

It all depends on the application.

14 RPM is very slow speed. The PMSM motor I used to play with that can produce 5NM of torque is almost 6 inch in diameter and 5 inch long. Using a gear reducer will make the package a lot smaller.

Hi Dan,
The power requirment is so small that it is below the industrial level. I would suggest that you visit your local auto surplus shop and look for gearmotors used to wind the windows up and down. These are available in 12 VDC and may be in the 14 rpm range with either a small diameter shaft or a hollow bore. Then you may be able to adapt your mounting bracket around the gearmotor. These are designed for intermittant duty so you might want to select one with 8 to 10Nm of torque if your application full load continuous duty.
Regards, Ron Smart

Dan,
I'm with Globe Motors. Please forward me the full spec at gjsutton0430@aol.com.
Thank you,
Gary Sutton

please forward all quotes and for more details...nicola@purenovelty.co.uk

Have you considered using a step motor? A size 34 stepper can provide this torque directly at the noted slow speed simply and inexpensively. Consider a motor like the 8718L from Lin Engineering (provides 6.25NM at 14RPM with 24V supply). Simple motor control needed (available from LIN and others).