The complete offering of Thomson profile rail linear guide rail and carriage assemblies includes a broad range of styles, sizes and unique features produced to industry standard dimensions.
500 Series Roller Linear Guide Rail
Rigidity is achieved by using the equivalent of a back-to-back bearing arrangement, complemented by special rollers that are crowned to prevent roller edge loading when misalignment is present. This results in lower elastic deformation as the load increases compared to a ball carriage or face-to-face bearing arrangement. A ball provides a single point contact area, while a roller provides a much greater line contact area. This results in a substantially higher load carrying capacity and lower wear with minimum rolling friction.
500 Series Ball Linear Guide Rail
This linear guide rail is produced from high-quality bearing steel. Almost all carriages, rails and rolling elements are through hardened. The end cap is constructed of a high-strength, glass-filled nylon with nitrile rubber seal.
400 Series Profile Rail Linear Guides
This guide rail is an ideal solution for cost-sensitive applications and is designed as a drop-in replacement with industry standard envelope and hole patterns. Caged and non-caged carriages utilize the same rail design, enabling efficient use of inventory since only one rail type needs to be stocked for either carriage type.
MicroGuide® Linear Guides
This stainless steel miniature guidance system provides corrosion resistance in certain clean room and washdown applications. MicroGuide's two-track Gothic arch ball groove geometry enables single rail application. It is also ideal for small design envelope requirements in semiconductor processing equipment and medical diagnostic equipment.
AccuMini Linear Guides
These linear guides offer a superior, patented ball control design for smooth, quiet, low-friction linear motion even at high speeds. AccuMini's Gothic arch ball groove geometry provides high roll moment capacity - a requirement for standalone applications.
T-Series Linear Guides
A lightweight, flexible and more compliant alternative to all-steel profile rails, this high-quality product is made from aircraft aluminum alloy with hardened-steel, load-bearing plates and ball paths, and is an ideal choice for applications requiring reduced weight inertia. This aluminum guidance system uses hardened steel inserts in carriages and rails to provide a low-weight solution for critical, high-performance applications.
When specifying linear guides for your applications, there are two types of guide rails from which to choose: square (profile) guide rail and round guide rails (shafting). Your application will dictate which type of linear guide rail should be used.
Square guide rail is well suited to high-load applications that require good rigidity and high accuracy. These linear guide rails achieve their performance through the precise grinding of the ball tracks in the rail, which have close conformity to the balls. The classic application for profile rail bearings is in the machine tool industry, where load capacity, rigidity and accuracy are paramount. Round guide rails offer several advantages of their own, including the ability to run smoothly when mounted to less-than-perfect surfaces or used for vertical movements with heavy loads.
For a more detailed analysis of choosing square or round linear guide rails, click here.
Profile rail bearings are generally mounted to structures that are inherently stiffer than the rail. For this reason, the bearings tend to assume the contour of the surfaces to which they are fastened through bearing deflection. When deflection is imposed upon a bearing, especially a preloaded one, resultant forces occur. These forces are transferred to the rolling elements and races, potentially resulting in an increase in system friction and a decrease in system resolution, precision and life.