Installation-friendly mounted bearings for demanding applications

With its SNN series, NSK is presenting a new series of plummer blocks that have been developed for use in unfavourable application conditions. ­Various types of roller bearings and sealing materials are available to ensure the optimum adjustment of the easy-to-install bearings for any application.

 

Plummer blocks are often used in applications involving adverse conditions, e.g. in conveyor systems, in equipment in the quarrying industry, in fans and compressors as well as in steel production and processing. The new plummer blocks in the SNN series (Fig.) were designed precisely for such demanding applications. They are exceptionally easy to install thanks to design details, such as the solid corners of the housing that provide an optimal hold for positioning pins, and a centre mark for easy alignment.

 

A high-quality casting with high rigidity is used as the housing. The FEM-optimised design enables a reduction in weight and very good heat dissipation. Moreover, the precision-engineered split housing ensures easy replacement of the bearings. Relubrication is possible via two boreholes. A grease drain hole is also provided. The housings can be fitted with quality self-aligning ball bearings or spherical roller bearings from the NSK range, which achieve a very long lifetime even when exposed to high loads. They reliably compensate for misalignments and increase the lifetime of the entire drive.

 

A central design element for plummer blocks in adverse environmental conditions is the sealing system. With the SNN series, the user has the choice between double lip seals, V-ring seals, felt seals, labyrinth seals and taconite seals, and can therefore select the optimum seal for the individual application depending on, for example, the surrounding temperature, shaft speed and the type of the contamination. The mounted units in the SNN series can be supplied for shaft dia­meters from 20 mm to 140 mm. For larger shaft diameters up to 380 mm, the new SD 3100 series is available.

 

x

Related articles:

Issue 06/2019 Profitable

Cost savings in ore production by switching to spherical roller bearings from NSK

I?n ore processing systems often operate under unfavorable conditions and with correspondingly reduced service life. High temperatures, high loads and contaminants can also affect the operation of...

more
Issue 04/2012

NSK roller bearings for harsh environmental conditions

With the AIP (Asset Impro- vement Programme), NSK has developed a service aimed at increasing roller bear­ing lifetime in operation. A case study from the quarrying and mining industry shows how...

more

Spherical roller bearings withstand harsh environment

NSK has developed new spherical roller bearings for conveyor belt drive pulleys used in harsh environment applications that offer simple installation and excellent sealing efficiency. Although ideal...

more
Issue 01-02/2022 Rolling bearings in mining

Significantly longer service life for conveyor bearings

C?onveyor systems in mining often experience premature failures of the roller bearings on the tensioning pulley. Often their service life is only a few months. This does not have to be the case. NSK...

more
Issue 01-02/2013

New tapered roller bearings for heavy-duty construction machinery

NSK has developed a new series of tapered roller ­bearings for use in heavy-duty construction ­machinery (Fig.). The key feature of these bearings is the effective protection against creep between...

more