Tests have shown that new bearings can reduce grease consumption by up to 99% when used in HPGR

SKF has expanded its large-scale bearing series for roller presses, using a sealed version, which can reduce grease consumption in bearings by up to 99%, extend service life and reduce costs.

Explorer spherical roller bearings (SRB) in the 241 series are now available with bore diameters up to 1,250 mm. This series and size are usually used for high pressure grinding rollers (HPGR) in the cement industry.

"Using sealed bearings is the best way to increase the mean time between failures," said Daniel Ortega, SKF Sealed SRB Product Line Manager. "This is a long-term investment that can improve machine availability and reliability."

The new version-sealed on both sides-doubles the service life of open bearings, and tests have shown that it can reduce grease consumption by up to 99%.

For example, in HPGR, four large spherical roller bearings are usually used. During the three-month maintenance interval, 540 kg of grease is usually used for certain sizes.

However, the use of SKF sealed Explorer spherical roller bearings requires only 7 kg of grease in the same interval, which reduces costs and reduces environmental impact.

SKF says this improves productivity and machine availability, while reducing total cost of ownership. In addition, the sealed SRB can be remanufactured a second time, further extending the service life.

The new bearing has been redesigned to have a higher load carrying capacity. Bearings with a bore diameter of less than 1,000 mm have HNBR seals secured by snap rings. Larger bearings use G-ECOPUR seals bolted to the outer ring of the bearing.

New bearings, even in the largest size, have a short delivery time.

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