This data sheet interacts with PRT2 Catalogue 40 - 47 No.14 PRT2 1-Trak PRT2 1-Trak is a new innovation in guided motion systems which further enhances the acclaimed HepcoMotion PRT2 range of Ring and Track System Products. 1-Trak enables track circuits and applications hitherto thought impossible, to be achieved. The technology is patent pending, and has the following features and benefits: • • • • • Tracks which are made in one piece, without joints. Tracks with integral base to form the structural part of a machine. Tracks which can follow almost any conceivable 2 dimensional path. Tracks with a Vee profiled section of any size to suit bearings from Ø13 to 150mm. Tracks with a rectangular profile and roller carriages, for use in tandem with Vee profiled systems to compensate for parallelism tolerances. • Track systems with no play between carriage wheels and the track, anywhere around the circuit. • The option of corrosion resistant tracks, carriages and bearings. Example systems are shown below, with further details on the fol

One-Piece Tracks with Integral Base Plate HepcoMotion PRT2 1-Trak systems are precision machined in one piece from very high grade steel and are surface hardened for wear resistance. A unique manufacturing approach ensures high accuracy and close tolerances on straightness, flatness and shape. This construction eliminates assembly, due to the absence of joints, with no possibility of misalignment during installation or in service. 1-Trak is made from a single piece of steel so that the track is one with the base plate. This gives a very strong and accurate foundation which can be the key structural...

Three Bearing Carriage Geometry A key innovation of the PRT2 1-Trak design is the three bearing carriage. This offers great flexibility, but at the expense of reduced load capacity compared to a four bearing carriage. The reduction depends on the load configuration, but 25% is typical. In a conventional PRT2 track system, the width of straight and curved sections in one track is always the same. When fixed centre (FCC type) carriages are used, a small amount of play is experienced at the straight-to-curve transitions, but not elsewhere. In a 1-Trak three bearing system, the track width constantly...

Track Systems with Complete Size Flexibility Standard PRT2 track system components are produced in volume and are the popular choice for most rectangular and oval circuits, where the straight and curved slides can use standard radii and section widths. The 1-Trak approach, however, provides complete flexibility to chose dimensions to meet exactly the requirements of the application. Generally, 1-Trak systems are more expensive than similar standard PRT2 tracks, but smaller systems made in volume may cost less. With the 1-Track system, it is possible to have very wide slide sections with bearings...

Track Systems with Rack and Pinion Drive PRT2 1-Trak is also available with a rack and pinion driven carriage. Uniquely, the 1-Trak design allows correct and constant mesh between pinion and rack all around the circuit. Unlike other systems, the pitch line of the rack follows a complex path in unison with that of the pinion. Therefore, there is no requirement to have the pinion sprung against the rack to compensate for varying engagement. This hugely simplifies the carriage design, and increases load capacity. The gear teeth on the track are precision machined and surface hardened to produce...

Track Systems Used in Parallel When Vee profiled track systems are mounted in parallel onto a rigid support, any installation parallelism errors can result in the preloading of the system. This may cause binding, excessive loading of bearings and increased friction. To address this issue, PRT2 1-Trak systems can be made with a rectangular profile using carriages with HepcoMotion GV3 track rollers (visit www.HepcoMotion.com/GV3datauk select GV3 catalogue, and see pages 41-43). This design provides precise, play-free guidance for movement around the track, but allows freedom for the carriages to...

How to Specify a PRT2 1-Trak System The following is intended as a guide and customers are requested to involve Hepco’s technical sales engineers in the final specification before ordering. Communication is best assisted by submission of a sketch. 1-Trak systems are made to order and HepcoMotion will produce a drawing for approval prior to manufacture. Specify the carriage: For bearing sizes, part numbers and capacities see table page 8. For other information see PRT2 catalogue at www.HepcoMotion.com/PRT2datauk. Pair of concentric (non adjustable) bearings: Specify the part number and whether...

How to Specify a PRT2 1-Trak System Lubrication Options: An oil film on the running surfaces of the Vees is essential for the 1-Trak system in order to reduce wear and prolong life. This can be achieved by the following methods and should be discussed first, with Hepco’s technical sales engineers. Lubricators: In many cases, PRT2 Lubricators can be fitted to to the carriage (see PRT2 catalogue page 37). However, this is only possible in systems without tight bends, due to limited stroke of the wipers. Bleed Lubrication: This system channels lubricant directly to the Vees of the track and can...