High Transmission Chain torque motors are virtually simply a regular, internally commutated brushless DC Motors mounted with extra gear mechanism at 
the top, to either boost the torque or to decrease the RPM (Revolutions per minute). These DC motors are calm effective and can be utilized in a number of hobbyist and commercial application.
Reducing the RPM whilst maintaining high torque would require adding up more technical gear mechanism hence the cost of these High torque DC motors mainly depends upon the RPM, torque and quality of the motors.The motor shaft from the bottom electric motor though a transmission connects the tiny gear box fixed at its front portion, which in turn generates the required torque while keeping the RPM low, the whole gears and gear heads are doped with thick viscous grease lubricant.
These High torque Motors seriously numerous RPM’s such as, 5 RPM, 10 RPM, 100 RPM, 300 RPM, 1000 RPM and so on. The price of these geared motors is based on the RPM, usually lesser RPM costs more than those of higher RPM.
Applications
High torque and low rpm DC motors are perfect for robotic and hobby applications, thought how big is the motor is a matter of concern since it is quiet huge in size because of additional gear box but nonetheless it would save the trouble and cost of adding external gears to the assembly of robots where just the regular DC motors wouldn’t do well. The High Torque, Low RPM DC motors includes inbuilt gearbox system providing required torque for your robotic software. Hence these motors would be the the majority of favorable choice for the hobbyist robotic tasks and tutorials posted right here.