Antifriction rollers

These high pressures require the use of antifriction rollers to avoid excessive drive horsepowers. Even with such efficient rollers, the drive for a panel line running at 50 ft./min. 

We experienced no difficulty with the standard antifriction roller bearings used in the pump. 

The axial flow compressors in aero gas turbines are heavily loaded. The aspecl ratio of the blades, especially the first few stages, can be as high as 4.0, and the effecl of streamhne curvature is substantial. The streamline configuration is a function of the annular passage area, the camber and thickness distribution of the blade, and the flow angles at the inlet and outlet of the blades. The shafts on these units are supported on antifriction bearings (roller or ball bearings). 

VulkoIIan . [Bayer Miles] Water-crosslinked polyurethane elastomer for pun diaphragms, coupling elements, solid dres, rollers, pump housings, seals, wipers, bush and split sections ftK antifriction bearings and flexible couplings. 

As in all medium-pressure agglomerators that use rollers for the densification and extrusion of moist and/or plastic materials, the primary cause for roller rotation is friction between the roller surface and the material to be processed. The roller is mounted on a shaft with sealed antifriction bearings and is brought to close proximity... 

Roll arrangement Design Bearings Antifriction (ball/roller) Sleeve... 

Ring An annular part of a radial rolling bearing incorporating one or more raceways. Roller bearing An antifriction bearing with rollers as rolling elements. 

Spherical roller thrust bearing An antifriction thrust bearing using spherical rollers as... 

The complement of rolling elements in antifriction bearings comprises balls or roUers (or even a combination of both in some special designs). In concept, the balls or rollers are arranged within a bearing primarily to support either pure radial or pure thrust loading, but they sometimes have the capability to accomphsh both. 

Antifriction or rolling-element bearings use balls or rollers to substitute rolling friction for sliding friction. This type of bearing has closer tolerances than do plain bearings and is used where precision, high speeds, and heavy loads are encountered. 

The carrier rollers in most chains are also used to engage the sprockets. However, carrier rollers, equipped with antifriction bearings, are sometimes used as outboard rollers on rollerless chains. 

Offset sidebar rollerless chain is nsed primarily on conveyors and bncket elevators. Such chains usually slide on ways or between gnides. One speciahzed use is on conveyors, where the load is carried on the ways, with ontboard rollers having antifriction bearings the chain bushings engage the sprocket teeth to drive the conveyor. 

Rollers with antifriction bearings are sometimes installed on heavy-duty chains. Such a roller is shown in Figure 13-15. Such rollers may have removable caps for grease packing or may be equipped with grease pressure fittings. Rollers with antifriction bearings are normally used as outboard rollers on heavy-duty chains so they will not to be subject to sprocket impact. 

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