MTI's Model 63 Series of Roller-Stabilizers opened a new ear in blast hole stabilization. It was the original Roller-Stabilizer designed especially for blast hole drilling. The elimination of maintenance time and labour costs normally required for replacement of work components or more conventional stabilizers resulted in wide acceptance of the expendable unit. Continued development brought about the Model 63-B which provides increased torsional strength and larger air circulation area. Increased life and reduced operating costs are achieved with the 63-B design through the use of rollers and bearings of the largest diameter practical within a given hole size.
Rollers with pressed-in tungsten carbide compacts, working against deeply carburized precision honed, air-cooled bearings, assure long life. Increased air circulation area is accomplished by the use of a patented aero construction which conducts air through the bearing pins to the drilling bit.