Gearboxes have been copied repeatedly. They are available from a number of sources and they suffer the same problems. Now for the first time there is a new design that addresses old problems. PT Tech is known in the coal industry for its torque limiters and enclosed brakes. Most continuous miners, shuttle cars and scoops have PT Tech products. In other markets PT Tech is also known for its gearboxes...some up to 1000Hp. Now you have the best of both worlds a gearbox AND brake combination. PT Tech is a trusted name for its quality and customer service.