New FAG high performance spherical roller bearings from Schaeffler Australia feature Durotect CK coating in the bore to offer 70 per cent better lifespan when withstanding the extreme stresses of the exciter units of vibratory machinery.

The FAG T41D series of Special Spherical Roller Bearings – featuring Schaeffler X-Life quality standards and the hard chromium Durotect CK premium performance coating – are designed to curtail fretting corrosion of shafts and journal wear, setting new industry benchmarks throughout Australia and New Zealand for longer service life.

The high durability bearings simultaneously deliver greater load carrying capacity, greater operational safety (by preventing breakdowns and extensive maintenance) and more efficient use of space in heavy duty applications,” says Schaeffler Australia Pty Ltd Industrial Sector Manager Mr Martin Grosvenor.

Features of the FAG T41D series and its Durotect CK protection include:

• Special T41 dimensional tolerances apply to the bearings’ inner and outer rings, meaning optimum interference fit can be achieved on the outer ring and sliding fit on the inner ring. The bearings’ C4 radial internal clearance prevents harmful radial preloading.

• Durotect CK plating on the inner bore not only prevents fretting corrosion of the shaft, but also reduces cross-location of bearings and gives improved load distribution because of unhindered thermal expansion of the shaft

• X-Life features include Bainite heat treatment, giving improved productivity through temperature stability up to 200C; surface hardened cage with high wear resistance; and cage guidance by the outer ring to accommodate centrifugal forces. X-Life’s tighter inside and outside diameter dimensional tolerances offer better control of fit in both housing and shaft.

FAG T41D with Durotect CK are purpose-designed to meet and exceed the challenges of rolling bearings in vibrating screens, which are typically stressed by high, mostly shock-type loads.

The bearings, while rotating about their own axis, perform a circular, elliptical or linear vibrating motion. This results in high radial accelerations which additionally stress the bearings, and especially the cages, considerably.

Operating speeds are usually very high. As a result, the bearing temperatures are up to 20 to 30 degrees Kelvin higher than in normal applications.

In addition, considerable misalignments between the bearing locations and considerable shaft deflections have to be accommodated, which is what the FAG T41D series does outstandingly well.

Coatings such as Durotect CK can profoundly improve a variety of bearing characteristics, such as wear, corrosion-resistance, run-in behaviour and behaviours under lubrication-starved conditions. Combining the benefits of the T41D design with the Durotect CK performance coating means operators can function more efficiently and achieve the lowest total cost of ownership (TCO) while delivering a higher level of performance and machine reliability.