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Reliable Plant July August 2008

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PRODUCT<br />

SPOTLIGHT<br />

SKF CYLINDRICAL<br />

ROLLER BEARINGS<br />

SKF cylindrical roller bearings feature unique logarithmically<br />

“crowned” rollers which provide improved contact geometry<br />

between roller and raceway. This roller profile reduces stresses under<br />

high loads, enables excellent performance even under misaligned<br />

conditions, and promotes cooler running to allow for high-speed<br />

operation and longer bearing life. Their precision-honed inner and<br />

outer ring, raceways, and rollers additionally improve lubricant<br />

effectiveness to contribute quieter, cooler and reliable service. The<br />

bearings are offered in single-, double- and multiple-row designs<br />

that differ in the arrangement, design and construction of retaining<br />

flanges. Available bore sizes range in diameter<br />

from 25 to 1,000 millimeters<br />

(0.9843 to 39.3701 inches).<br />

SKF USA Inc.<br />

www.skfusa.com<br />

800-440-4753<br />

TIMKEN TAPERED<br />

ROLLER BEARINGS<br />

Timken tapered roller bearings consist of a cone assembly and a cup.<br />

They are usually fitted as one of an opposing pair. During equipment<br />

assembly, single-row bearings can be set to the required clearance<br />

(endplay) or preload condition to optimize performance. Single-row<br />

tapered roller bearings have positive roller alignment that ensures true<br />

rolling motion and generates a “seating force” that pushes the roller<br />

against the cone large rib. This seating force prevents the rollers from<br />

skewing off apex, thereby keeping them positively aligned and located<br />

against the cone large rib. Products are available<br />

with inside diameters ranging from 7.937<br />

to 863.6 millimeters (0.31225 to 34<br />

inches) and outside diameters<br />

ranging from 31.991 to 1,060<br />

mm (1.2595 to 41.7323<br />

inches).<br />

The Timken Company<br />

www.timken.com<br />

330-438-3000<br />

MRC MARATHON BEARING UNITS<br />

MRC brand Marathon series prelubricated mounted bearing units<br />

offer sustained maintenance benefits by eliminating the need for<br />

regreasing. The USDA H1-approved high-quality synthetic grease is<br />

odorless, tasteless and approved for use in all food processing and<br />

beverage industry applications. Among other benefits, the grease<br />

imparts excellent internal and external bearing protection, high aging<br />

resistance for extended lubricant life, and high load-carrying capacity,<br />

which helps to prevent premature bearing wear. The Marathon series<br />

includes heavy-duty, extreme-duty and composite versions incorporating<br />

high-quality, corrosion-resistant insert bearings (coated or<br />

stainless). Available in a range of sizes, standard housing styles<br />

include pillow block, two- or four-bolt flange, or tapped base.<br />

SKF / MRC<br />

www.skfusa.com/mrc<br />

800-440-4753<br />

IGUS SLEWING RING BEARINGS<br />

Slewing ring bearings from igus use two self-lubricating, low-friction<br />

polymer sliding elements in place of ball bearings. The cost-effective,<br />

low-noise “PRT” modules are highly wear resistant, easy to install<br />

and completely maintenance-free. The slewing rings are also robust<br />

and have a high load capacity. The PRT slewing rings have aluminum<br />

housings and use stainless steel screws. The polymer sliding elements<br />

are made from igus’ high-performance iglide J, which contains a<br />

solid lubricant. This material also boasts a low coefficient of friction,<br />

chemical resistance, low moisture absorption and good vibration<br />

dampening properties. These slewing ring bearings are suitable for<br />

all environments, in particular semiconductor and cleanroom applications,<br />

assembly lines, production facilities and robots.<br />

igus Inc.<br />

www.igus.com<br />

800-521-2747<br />

www.reliableplant.com <strong>July</strong> - <strong>August</strong> <strong>2008</strong> 29

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