In the context of profiled rail guides with recirculating balls, the raceway geometry defines how the load-carrying balls are positioned relative to the raceways of the rail and the bearing (aka “carriage” or “slide”). The two most common raceway geometries are referred to as circular arc and Gothic arch, but some manufacturers have adopted a […]
Beam deflection equations for linear systems
When a linear guide, such as a round shaft or profiled rail, deflects or sags, the bearings that travel along the guide experience edge loading (a higher load concentrated at the ends of the bearing), which can cause rough, irregular movement, increased wear, and reduced bearing life. And when a linear guide is incorporated into […]
THK expands manufacturing plants and automated processes in response to LM guide demand
THK is taking major steps to meet the growing worldwide demand for linear motion products. In fact, as the world leader in linear motion guides, THK has recently invested over a half-billion dollars in new brick and mortar facilities that will increase floor space for their global manufacturing operations to just under 10.5 million square […]
What benefits do dovetail slides offer versus other linear bearing types?
Dovetail slides are a type of plain linear bearing — along with boxway slides and plain bushings made of plastic, composite, or bronze — that rely on direct contact between sliding surfaces to support a load. These differ from modern rolling element linear bearings, which use balls or rollers to reduce friction between the load-bearing […]
Case-hardened tapped or threaded shafts, ready to ship
Made in the U.S.A., NB’s shafts are never annealed, so outer diameters are ultra precise — tolerances are always reliable. Tapped shafts can be ordered with one or both ends tapped, in either case-hardened carbon steel or stainless steel. Threaded shafts can be ordered with one or both ends threaded, in case-hardened carbon steel. Diameters […]
Timken acquiring linear-motion supplier Rollon
The Timken Company, a world leader in engineered bearings and power transmission products, has reached an agreement with pan-European firm Chequers Capital and IGI Private Equity to acquire Rollon Group. A leader in engineered linear motion products, Rollon specializes in the design and manufacture of linear guides, telescopic rails and linear actuators used in a […]
What’s the difference between dynamic load capacity and static load capacity?
Rolling element linear bearings, such as round shafts and bushings, profiled rail guides, crossed roller slides, and even ball screws, have two load capacity specifications — dynamic load capacity and static load capacity — which are based on different operating parameters and performance criteria and are independent of each other. To accurately size and select a […]
When should you use a ball spline?
A ball spline is a type of rolling bearing linear guide, similar to a round shaft and bushing assembly, but with a critical distinction in its operation. The shaft of a ball spline is much like a linear guide shaft, except that the spline shaft has grooves along its length. The spline nut (analogous to […]
Bishop-Wisecarver President Pamela Kan wins Women’s Business Enterprise Star Award
Bishop-Wisecarver president Pamela Kan was selected by the Women’s Business Enterprise National Council (WBENC) as a 2018 Women’s Business Enterprise Star. This prestigious award is given annually to only 14 women from across the country based on their contributions to their local communities and respective businesses. As one of the small number of female leaders […]
New bearing from igus assists in quick, easy liner replacement
igus has introduced a new bearing, drylin W Exchange, for its drylin W linear system in which the liner can be replaced directly on the rail without dismantling the system. By using a practical assembly tool, users can push the old liner out of the housing, clip the new one on to the shaft and […]
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