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Cam followers convert rotary to linear motion and range from simple two-dimensional cams to complex three-dimensional indexing cams with several followers. In any application, cam follower bearings reduce sliding friction and wear on the cam and track, which lets it maintain its precision. This is most useful when several cam follower bearings support a load and mounting inaccuracies prevent standard bearings from equally sharing the load. [Extracted from the article]

The article evaluates products including the Solenoid Proportional Valves from ATAM Group, Schaeffler Group USA Inc.'s Vacrodur, a powder-metallurgically produced high-performance steel, and Precision Flow Control Products from Clippard.

The article presents information on the identification of the best plain bearing. Topics include the use of sleeve-type bearings in rotating or sliding shaft applications, the need to consider factors during the selection such as contamination, operating temperatures, and chemical use, and an understanding of the pressure multiplied by the speed of operation (pV) value.

The article discusses developments which have fostered more-precise machining. Particular focus is given to the evolution from plain bearings to ball and roller-recirculating linear guides. It cites the very good damping characteristics of plain-bearing systems, as well as the relationship of stiffness versus damping in plain and recirculating-type bearing guides. The importance of considering the balance of the overall structural mass with highly preloaded linear bearings is explained.

The article focuses on efficiency flat-land thrust bearings. It discusses the variety of the bearings' load limits depending on their sizes, features and pounds per square inch and cites its relevance to low-load applications. In addition, it elucidates the bearings' performance characteristics depending in oil feeding. The bearings' temperature and load capacity are also discussed.

The article focuses on the plain bearings. They can replace rolling-element bearings in many applications. Plain bearings can meet the high-load, low-maintenance, long-life needs of demanding applications. Furthermore, larger contact areas let plain bearings bear more load, resist shocks, and tolerate misalignment.

The article explains the calculation of bearing life. It notes that engineers often employ rolling-contact fatigue models that compare bearing load ratings to applied dynamic and static loads. The loads acting on a bearing are calculated using classical mechanics and known or calculable external forces such as resultants from power transmission. The pros and cons of bearing life calculated according to the standard set by the International Standard Organization (ISO) are presented.

Presents information on dry bearings. Characteristics of dry bearings; Importance of heat resistance when selecting dry bearings; Types of plastics used in dry bearings. INSET: SELECTING A PLASTIC BEARING.

The article focuses on the role of hybrid ceramic tapered roller spindle bearings in machining without cutting fluids. The tapered roller bearings have a radial stiffness and are less susceptible to overload compared to angular-contact ball bearings and cylindrical roller bearings. Another feature of the tapered-roller bearing is its true rolling motion that improves its performance. The special hybrid bearing has a minimum 200° load zone that adds to its rigidity.

Evaluates several bearing products in the U.S. Extended-Life bearings from Pacamor Kubar Bearings; DM10 self-lubricating bearings from GGB North America LLC.; Iglide plastic bearings from Igus Inc.

Presents information on the different types of needle-roller bearings. Drawn-cup bearings; Cage bearings; Thrust bearings. INSETS: Selecting a needle-roller bearing;REDUCING STRESS.

Reports miniature and instrument-sized ball bearings excel in jobs needing predictable levels of torque, runout and stiffness. Reason bearing makers typically package the units in Class 100 clean rooms after final inspection; Most common cause of raceway damage in miniature bearings; Three basic preload methods needed by bearings to remove axial play and boost axial and radial stiffness. INSET: PRESS FIT DO'S AND DON'TS.

The article presents a comparison of bearings including products from SKF US Inc., Kaydan Bearings Division, Igus Inc., Graphite Metallizing Corp., Stafford Manuacturing Corp. and GGB North America LLC.

Features the Spherolinder concentric half-sphere/half-cylinders from G2 Engineering that replace point contacts with line contacts in kinematic mounts. Applications of the connectors; Calculations for a single mounting site; Illustration of a comparison between point and line contacts.

Provides information on the UltraGlide gearbox sporting low-friction gears made from Delrin acetal designed by Performance Gear Systems Inc. Features of the gearbox; Components.

Offers guidelines for bearing selection as of July 11, 2002. Design metrics for bearing selection; Types of bearings; Properties of the bearings; Design loads for hydrodynamic bearings; Operating limits and wear factors for dry and semilubricated bearings.

Offers guidelines in preloading bearings. Functions of a design that call for preloaded ball bearings; Method of preloading bearings.

Recommends C-Flex bearings for applications that require limited angles of rotation. Description and properties of these bearings.

Reports on bearing-retaining devices. Functions of these devices; Properties of these devices; Applications.

The article discusses how engineers use hydraulic lift with oil-film lubrication to minimize friction and wear on big bearings lubed at low speeds. Topics include how sleeve journal bearings require oil and enough hydraulic pressure to begin lift off, how thrust bearings have flat bearing surfaces, and how engineers should optimize pocket shape and position along with pressurized oil supply in order to maximize performance.

Presents information on several bearings used in the machinery industry. Ultra Kleen wide-slot take-up frames of 304-Series stainless steel from Rockwell Automation; Model HT 03-LM vertical positioning from Steinmeyer Inc.; Iglide plastic bearings from Igus Inc.

The article features the self-lubricating rod end bearings from J.W. Winco Inc. The bearings are in threaded-stem or tapped type metric sizes control and link mechanisms in high-load, low-speed applications with hanging angles. The body of the bearings is made of zinc-plated steel with ball socket of hardened and ground bearing steel.

Introduces several bearings. Explorer angular-contact ball bearings from SKF; Bearings for chemical environments from Graphite Metallizing Corp.; Rotary bearings from Nordex Inc.

Evaluates the Model RG rolling-ring linear drives from Amacoil Inc. Capacity of the Model RG3-30; Capacity of the Model RG4-30.

Talks about designing linear rolling-element bearings. Description of the stick/slip phenomena in friction-type linear bearings; Importance of elliptical ball contact; Equation for the calculation of degree of conformity.

Describes linear ball bearings and crossed-roller slides. How travel length is determined; Limitations of this design; Other features.