In a round shaft linear bearing system, the shaft acts as the inner raceway of the bearing and plays a significant role in the wear and life of the system. Both recirculating and plain linear bearings can use a wide variety of shaft materials, depending on the application or environmental requirements. Shafts for recirculating linear […]
How do roller pillow blocks compare with traditional round shaft bearings?
Round shaft guides are typically used with plain (composite, plastic, or bronze) or recirculating ball style linear bearings. But another type of round shaft bearing — referred to as a roller block or roller pillow block — offers better stiffness than plain bearings and higher speed capabilities than recirculating ball types. Instead of balls, 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 […]
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 […]
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 […]
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 […]
“New Design” pillow and flange blocks from LM76 allow for easy bearing lubrication
“New Design” pillow blocks and flange blocks from LM76 feature a lubrication fitting and an alignment set screw in the pillow blocks and flange blocks. The stainless steel and self aligning linear bearings are modified by having an alignment flat ground on the bearings’ outer shell and drilling a hole through the outer shell. Lubricants […]
Pegasus Series 1 corrosion-resistant linear bearings from LM76
LM76 has developed the most corrosion resistant linear bearing available. The Pegasus Series 1 Linear Bearings feature Silicon Nitride (SiNi) Ceramic Balls in a shell with retainer and end caps all made from 440 Stainless Steel and then ArmorloyTM coated. In space, deep under the sea, or in the harshest environments when there can be […]
New linear bearing coming later this year: eXrail from NB Corp.
June 23, 2017 update: NB Corp. of America will be showcasing the new eXrail at SEMICON WEST 2017 — to be held July 11 to 13 in San Francisco. Here’s a preview of the eXrail: To see the actual product, visit NB’s booth 5244 at SEMICON WEST. The manufacturer is also offering free SEMICON WEST […]
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