The HDRT offers single-edge rings ranging from 512 to 1,656 mm (20.15 to 65.19 in.) in diameter, with an optional integral gear. Internal and external V-rings are compatible with three sizes of bearings and two lubricators for longer life. They are available in seven sizes and two precision grades as well as stainless steel. Gear cut rings and pinions are also available. The HDRT track system uses one size of double-edge ring segment linked to heavy-duty linear slides. Backplates and joint blocks are supplied according to design. Onepiece slides of up to 4 m can be butted together to create unlimited lengths. Double-edged ring segments and straight sides combine to form closed circuits and curved paths, with both left and right-hand bends, depending on the carriage. Two types of carriages are offered including a fixed-center version and a bogie carriage. The fixed-center version can be used on track systems with unidirectional bends of common radii and on double-edged rings and segments. The Bogie carriage swivels on a lubricated-for-life, play-free axial/radial ball bearing, for use with S bends or bends with varying radii. Both the fixed-center carriage and bogie carriage come in two standard sizes (64 or 95-mm diameter). A 120-mm version is available upon request. Carriages are high-strength aluminum alloy and are sold fully assembled. All use double-row ball bearings and offer a high axial/load capacity and come in either concentric or adjustable eccentric forms. Additional options include a corrosion-resistant carriage, and stainless-steel bearings.

Bishop-Wisecarver Corp., 2104 Martin Way, Pittsburg, CA 94565, (888) 580-8272,