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  • Spherical-roller bearings graduate to a new class
    Advances in materials, design, and processing have combined to triple bearing life. EDITED BY KENNETH J. KORANE Explorer bearings are available in both sealed and unsealed versions, and are dimensionally interchangeable with existing spherical-roller bearings. They have higher load ratings and up
  • When space is at a premium
    , support radial loads. Needle rollers go between the cup bore (outer raceway) and shaft OD (inner raceway). Most applications depend on a housing press-fit to both size and locate the bearing. The design can accommodate seals, additional oil holes, and hold grease, if needed. Drawncup bearings
  • Slick bearings slash friction
    SKF in Sweden has developed a new family of bearings that reportedly reduces friction and energy consumption by at least 30%, compared to standard ISO products. New Energy Efficient bearings reportedly reduce energy consumption more than 30%, depending on bearing size and operating conditions
  • Cooler-running wheel bearings help racers burn up the track
    on bearing size. Proper grease load, combined with more efficient bearing rollers that rely on point contact rather than elliptical face contact, and reshaped roller ends, reduce friction, wear, and lower
  • Cool running
    the spindle and tooling, making it difficult to hold size on machined parts. Standard spindle-bearings under these conditions may reach temperatures above 150 F, exacerbating the problem. But special hybrid ceramic tapered roller bearings meet all the above design criteria and, under the same conditions
  • The X's and O's of Linear Guides
    Here's how bearing construction affects moment and load capacity. Linear guides house recirculating-ball or roller bearings in a runner block mounted on a profiled rail. Some linear guides have multipart seals to keep lubrication in and contaminants out. X-style rolling elements inside the bearing
  • Positioning in nanometers
    on top of linear cross-roller or air-bearing stages that provide coarser positioning. This combination of elements lets the system use a primary stage to move into the general vicinity of interest, then employ the secondary piezoelectric stage for final subnanometer moves. There
  • Choosing the Best Lead Screw for a Linear Motion Application
    Getting the best lead screw for the job Knowing the details of a linear-motion application increases the odds of choosing the right ball screw. Before engineers can specify the type and size of leadscrew needed for a linear-motion application, they must understand the demands of that the job

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