*Specially designed for tubular processing. Equilateral triangle supports running to assure the roundness.
*Equilateral triangle supports rolling for improving roundness, concentricity and vertical degree.
*Driving by hydraulic unit : featuring in easy operation and powerful pressure.
*The transmission gear with grinding shape : featuring in noise-free, durable and precise transmission.
*Particularly applied to the tubular thread procession, such as oil connectors, bicycle, automobile and motor vehicle parts, radiating pipe etc. 
