Roller Bearing Units suit conveyors in harsh conditions.

Press Release Summary:

Available for shaft diameters from 3 7/16 to 4 15/16 in., ConCentra SYAF one-piece assembled units integrate pre-lubricated SKF Explorer spherical roller bearings. Robust seal and flinger create double-barrier to protect against ingress of contaminants and optimize grease retention. By securely gripping circumference of rotating shaft, concentric mounting system virtually eliminates potential fretting corrosion and minimizes risks of imbalance-initiated vibration.

Original Press Release:

New SKF ConCentra SYAF Roller Bearing Units Introduce Ready-to-Mount and Reliable Solutions for Conveyors Exposed to Harsh Conditions

New SKF ConCentra SYAF roller bearing units introduce ready-to-mount and highly reliable solutions for conveyors exposed to harsh operating conditions. An innovative and unique concentric mounting system properly and securely grips the circumference of a rotating shaft to virtually eliminate potential fretting corrosion, minimize risks of imbalance-initiated vibration, and promote optimized function and trouble-free performance, contributing to longer service life. They ideally suit operations ranging from mines, quarries, and cement plants to power plants and steel mills, among others.

These "shaft ready" one-piece assembled units integrate pre-lubricated SKF Explorer spherical roller bearings offering high load-carrying capacity, long life, and high-quality performance. A robust seal and flinger create a double-barrier to protect against ingress of contaminants, enhance grease retention, and minimize maintenance. A rugged housing easily accepts heavy loads and reinforces durability in service.

The bearing units mount and dismount to the shaft quickly from the same side using only a torque wrench reducing axial space requirements. Once the bearing unit is correctly positioned on the shaft, angled set screws are tightened to axially displace the precision-engineered and matched stepped inner ring and sleeve, compressing the inner sleeve to grip the shaft evenly around the entire shaft circumference for a true concentric, tight fit. Up to 1.5 degrees of shaft misalignment can be accommodated without diminishing seal effectiveness.

Shaft diameters range from 3 7/16 in. to 4 15/16 in. and the units can accept commercial grade or re-usable shafting without necessitating specially machined and costly ground or polished shafts. Housings are interchangeable to industry bolt-pattern standards. Custom products can be developed.

Contact Jonny Nilsson, Product Manager, SKF USA Inc., 890 Forty Foot Road, Lansdale, PA 19446-0352. Phone: 267-436-6828. Fax: 267-436-6040. Email: Web site:

SKF is a leading global supplier of bearings, seals, mechatronics, lubrication systems and services, which include technical support, maintenance and reliability services, engineering consulting and training. SKF is represented in more than 130 countries and has around 15,000 distributor locations worldwide. Annual sales in 2011 were SEK 66,216 million and the number of employees was 46,039.

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