I need 2,000 pounds of pulling force

[fox2375]

I am working on a prototype machine that will be used to pull heavy machinery ( 40,000 pounds ) around on level flooring using multitons ( wheels used to move heavy machinery ). I have determined that I need a pulling force of 2,000 pounds to pull the heavy machines. I will be using an electric a/c motor and an industrial power transmission to do this. My problem is I do not know how to calculate how much Horse Power or Torque I need to accomplish this.
For example: 1 HP motor turning 1750 RPM with 116:1 reduction output 15RPM driving a 6 inch wheels would give 35 feet per minute ( perfect!)
If the power transmission could only handle 1,800 inch pounds of torque output, would it pull 2,000 pounds or brake?
Traction is not a problem because a can control the weight distribution on the wheels. I must stay within 29 to 39 feet of travel per minute using the 6 inch diameter wheels I have. How do I determine if I have enough Torque and HP to do the job.
Thank you for your time and assistance.

 

[RadarRay]

A 1HP motor at 1750 rated rpm with give you about 3 ft-lbs of torque (3*12 = 36 inch lbs). Using the gear ratio you said you have, give you 3+116= 348 ft lbs at the wheel shaft, which is the gear box output.
Your gear box is rated at 1800 in-lb or 150 ft-lb. So it looks like the gear box you have chosen is way to small for that motor.
You also have to determine if you are ok with the total force you requires. Is it at the surface of the wheel. If that is the case the 1hp gives (348 ft-lb/(3"wheel radius/12 inch/ft )) at the wheel or 1392 lbs at the edge of the wheel. If your 2000 lbs is calculated somewhere else you will have to calculate it out.

BTW, the equation for Tq from a motor is (HP*5250)/ base or rated speed. That is BASE for DC or RATED for AC. Not the speed it is geared in for.

 

[jbartos]

Suggestion: It may be worked from the gear box output backward to the motor. Once a suitable gear box is located, then the motor may be fitted by the gear box manufacturer.
Also, the series dc motor might be considered.