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MDA Technologies 3/2015

MDA Technologies 3/2015

MACHINE ELEMENTS 01 02

MACHINE ELEMENTS 01 02 03 01 Load distribution in a bearing fitted in a housing with conventional support 02 Load distribution in a bearing in a housing with cutaway – SNS housing design 03 Innovative design: SNS plummer block housing, here with FAG SmartCheck and FAG CONCEPT8 lubricator subject to load in the main load direction, the cutaway underneath the bearing produces a significantly wider load zone. The bearing load is more evenly distributed on several rolling elements, so that the maximum load is not located on the roller on the apex, but on the neighboring rollers. The new housing design leads to a reduction in the load on the rolling elements and thus significantly increases the operating life of the bearing. Design improvements reduce lifecycle costs Numerous other details of the new housing design make lubrication, mounting, and condition monitoring much easier and thus contribute to a reduction of the lifecycle costs (total cost of ownership) in addition to significantly increasing the operating life. A lubrication bore with a long lubrication groove has been integrated into the inside of the upper section of the housing, so the installed bearing can be optimally supplied with lubricant in each bearing position. The lower section of the housing contains grease outlet holes that allow escape of the used superfluous grease when grease relubrication is carried out. Connections for the online condition monitoring system FAG SmartCheck are provided on both sides as standard. This allows permanent monitoring of bearing condition and helps to prevent unplanned downtimes. A centering mark in the upper section of the housing indicates the optimum connection position for condition monitoring if these two connections for the FAG SmartCheck are not accessible. In addition, the FAG GreaseCheck sensor for online condition monitoring of lubricating grease is also available from Schaeffler that ensures the early detection of errors, optimized grease quantities and longer relubrication intervals. The new SNS plummer block housing can be prepared for use with this grease sensor without any problems. Furthermore, the compact lubrication system FAG ‘concept8’ completes the Schaeffler monitoring and lubrication program for bearings and enables proactive prevention of damage through exact adjustment of the grease quantity and individually controlled pump bodies. To make mounting especially easy, centering marks that indicate the center line of the bearing and shaft are provided in the lower section of the housing to allow fast alignment of the housing. The lower section of the housing also features precise locating surfaces that are reworked by machine. These surfaces are raised and therefore enable the use of strips for precise alignment. Once it has been aligned, the housing can be quickly replaced if required. For a wide range of applications The new SNS housing is manufactured from high-quality spheroidal graphite cast iron as standard and thus ensures a high level of operational reliability due to higher breaking strength and shock resistance. It can be used in a wide range of sectors, such as crushers and tube mills, belt conveyors and hoisting plants, paper mills, drive wheels, fans, small wind turbines and general heavy mechanical engineering. Bevels, small surfaces, and an upper 28 MDA Technologies 3/2015

04 05 06 04 SNS plummer block housing with a toroidal roller bearing (FAG TORB) 05 The BTAC bolt-on Taconite seal combines a labyrinth seal with a V-ring but is additionally screwed to the housing. It is specially designed for heavy-duty applications 06 The non-contact labyrinth seal for SNS plummer block housings is now also available in a split design. The NTSG split labyrinth seal simplifies mounting and repair work on continuous shafts and in places that are difficult to access housing section that covers the lower housing section eliminate collection points for fluid and contamination, ensure that fluid drains off, and reduce the cleaning outlay required. Rolling bearings of several different diameters and widths can be installed in the new SNS plummer block housing. The bearings are movable and thus function as non-locating bearings. Suitable bearings include spherical roller bearings from series 222, 223, 230, 231, 232, and 240, split spherical roller bearings and toroidal roller bearings (FAG TORB). The new FAG SNS series of plummer block housings can be used as a replacement for a wide range of conventional housings. The perfect seal for every application A wide range of sealing variants is available to allow flexible and cost-effective use in a variety of different applications. The NTS labyrinth seal is non-contact and therefore suitable for high circumferential speeds. Temperatures from –20 to +200°C are permissible. The labyrinth seal allows shaft misalignments of up to 0.3° in both directions. The NTC Taconite seal is a combination of a labyrinth seal and a V-ring. The phosphated surface of the seal makes it suitable for use in extremely contaminated environments at temperatures of –40 to +100°C. The Taconite seal allows shaft misalignments of up to 0.3° in both directions. The BTAC bolt-on Taconite seal combines a labyrinth seal with a V-ring but is additionally screwed to the housing. It was specially developed for use under harsh conditions of heavy-duty applications as in the extraction and processing of raw materials and provides reliable protection against dust and contamination. This seal features a split fixture, which allows the bearing to be visually inspected without having to remove the upper section of the housing. The non-contact labyrinth seal for SNS plummer block housings now is available in a split design. This simplifies mounting and repair work on continuous shafts and in places that are difficult to access. The NTSG split labyrinth seal allows repairs and maintenance to be carried out very quickly. It makes installation and repair work in places that are difficult to access and on continuous shafts particularly easy when combined with split bearings. Complex additional tasks such as removing gears and clutches, dismounting drives, and dismantling shaft lines are no longer necessary. This helps to reduce overall costs (TCO) significantly. www.schaeffler.com Company name: Schaeffler AG Brands: INA, LuK, FAG Headquarters: Herzogenaurach, Germany Turnover: € 12.1 Billion (2014) Employees: more than 80,000 (worldwide) Products: Rolling bearings, plain bearings, linear and direct drive technology, high precision products for automotive industry. About MDA Technologies 3/2015 29

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