Seals & Bearings

On-demand production of high-performance seals

ems sept 19 36SKF has unveiled a trio of new seal profiles for its SNL plummer block housings. For distributors and end-users an efficient and cost-effective means for their production has also been introduced.
 
The latest SKF seals have been developed for applications where better sealing performance is required than that provided by a labyrinth seal, but where space does not allow for a taconite seal. The new seal profiles are: TX, a single acting design with a lip seal facing outwards that prevents the ingress of contaminants while enabling grease flushing; TY, a double acting design with a lip facing outwards and a lip facing inwards; TZ, a double acting solution that features two single-lip seals in a back-to-back configuration.

Rollers with end profiling set new standard

ems july 19 22 5Spherical roller bearings from Schaeffler now even more durable

•    Rollers with end profiling will be successively introduced in all 241-series spherical roller bearings with bore diameters of 500 mm and above.
•    Edge pressure caused by abrasive material wear is at least 20 per cent lower.
•    Their use in roller presses – which are primarily used as grinding mills for cement and raw materials but also find use in the mining industry – offers lots of potential.

The rise of recycled bearings

ems april 1 19 1Bearings are circular, much like the economy they are used in. As more customers avoid disposing of bearings needlessly, Chris Johnson, managing director of bearing re-lubricator SMB Bearings, explains the sudden surge in popularity of reusing and recycling ball bearings through relubrication.

EXTENDING BEARING LIFE

bearing10 6 july 15The reliability of most rotating equipment is almost inevitably linked directly to bearing life, and it is estimated bearing failure is responsible for almost 21% of these equipment failures (Bloch, 2011).  

Research into bearing failures  shows that just over half of these are a result of contamination of the bearing oil (Fig 1). Clearly it is therefore essential to ensure that contamination of the bearing lubricant is minimised and if possible eliminated if optimum bearing life is to be achieved thereby improving the equipment reliability (MTBF).

Eliminate 52% of bearing failures with LabTecta®66

pump 6 july 15Save your bearings with LabTecta®66, which can reduce bearing oil contamination from 83% to 0.0003%.

LabTecta®66

Research shows that 52% of bearing failures are due to contamination of the bearing oil, which represent 20.8% of all rotating equipment failures.

LabTecta®66 is a labyrinth design bearing protection seal, which is proven to increase equipment reliability in pumps, electric motors, fans, pillow blocks, steam turbines and gearboxes.

A guide to material selection for rolling bearings

scheaffler-203By offering a wide choice of materials and heat treatments for rolling bearings, performance and operating life can be optimised, even for the most demanding industrial applications, says Dr Steve Lacey, Engineering Manager at Schaeffler UK.

In recent years, there has been a significant increase in the demand for rolling bearings that, even under extreme operating conditions – including lubricant starvation, highly corrosive or high temperature environments – still provide a long operating life and optimum performance.

But selecting a suitable material or heat treatment process for rolling bearings often requires expert advice and guidance, normally from the manufacturer of the bearings. Selection depends on the application itself and the specific environment in which the bearings will operate. This means a number of factors require careful consideration, such as the mechanical, chemical and thermal requirements placed on the bearings, as well as lubrication conditions, particularly if the application requires dry running bearings.

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