SKF LLT profile rail guides from SKF Motion Technologies, Inc. have been uniquely designed to deliver smooth running performance, high precision and accuracy, and long service life with minimal maintenance for a wide range of linear guiding applications. LLT guides have the ball circuits placed in an X-arrangement, which optimizes load sharing in all four […]
How raceway geometry affects profiled rail guide performance
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 […]
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 […]
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 […]
NB SGL slide guides for precise and rigid support of linear motion
The expanded line of NB SGL slide guides from NB Corp. of America are high-precision linear bearings with low friction and non-stick (and non-slip) mechanisms for smooth linear motion … even under high loads. The SGL Slide Guides are 160 mm to 3,000 mm long. Six types of blocks are available depending on the mounting […]
Rail brakes now available in additional sizes with wider compatibility
Profile Guide Rail Brakes from Nexen Group, Inc. are now available in a wider range of sizes, from 15 to 65 mm, and are fully compatible with an even wider range of guide rail manufacturers, including THK, NSK, IKO, HIWIN, INA, SKF, Star, Bosch, Accu Tech and Schneeberger. As a result, they provide great first fit […]
New Polygon Ball Guide (PBG) from Samick Precision Industry
The Samick PBG is a compact linear motion bearing that has a polygonal structure. This compact linear motion bearing is optimized to be used as a guide for transporting precision components such as small measuring instruments, semiconductors, LED chip sorters, and small size lens sorters. Features of the Samick PBG include: High precision, high rigidity, […]
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