The Pillow Block Range

NTN-SNR BEARINGS shall not be held liable for any possible errors or omissions that may have been included in this catalogue despite the care and attention that has gone into its production. On account of our continuous Research & Development policy, we reserve the right to modify without notice any or all of the specifications stated in this document. © NTN-SNR ROULEMENTS, copyright international 2015.

• The NTN-SNR pillow block housing conception _ 06 • Bearing arrangement construction, 10 Part 2 Lubrication and mounting, 21 • New range of housings made of spheroidal-graphite (ductile) cast iron: SNCD, 30 • Double lip seal mounting SC..DS, 32 • Felt strip seal mounting SC..FS, 34 • V-ring seal mounting SC..SV, 36 • Labyrinth seal mounting SC..LA, 38 • Taconite seal mounting SC..TA, 40 Part 3 Technical data for housing, 43 • Seal variants and kit sets, 45 • Examples for ordering SNC bearing housing, 46 Part 4 Other ranges: plummer blocks & one-piece...

Part 1 SNC. The fundamentals • The expertise of a manufacturer, the scope of a leader. 04 • The NTN-SNR pillow block housing conception, 06 • Bearing arrangement construction. 10

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Teil 1 SNC. The fundamentals A design developed to meet Innovation as a founding value your requirements With an ubiquitous presence in the industrial, automotive and aerospace markets, NTN-SNR is not content to merely offer the most comprehensive range of standard and specialist solutions available on the market for Original Equipment and spares. Driven by a well-honed sense of innovation and a constant concern for quality, we strive daily to enhance the performance of our bearings and anticipate your future requirements. More compact, lighter, more economical, more reliable, more efficient...

The NTN-SNC pillow block housing conception Variable, efficient, user friendly! That’s the basic concept behind our SNC series. Basic design Modular principle Our two-part bearing housings are made up of an upper and a lower section. This greatly simplifies the mounting and maintenance of the units, as the bearing and sealing elements can be mounted on the shaft first and then simply inserted into the pre-positioned lower section of the housing. These units are compatible with ISO standards 02, 03, 22, 23 and 32 sized self-aligning bearings or roller bearings. The high performance NTN-SNR...

Teil 1 SNC. The fundamentals Development principles The development process for our bearing housings always follows an established and proven principle: design, optimization and determination of load limits. True to these principles, all SNC housings are designed using our 3D CAD software. The shape and design of the individual housing cross-sections are calculated and optimised by our specialist engineers using the finite element method (FEM). At NTN-SNR, theory and practice are aligned in sophisticated endurance tests on the test bench and in practical load tests. Structural details Drawing...

Connection bolts On SNC pillow block housings, bolts with a larger diameter than on comparable housings are used to connect the upper and lower sections of the housing. This enables higher radial loads to act on the housing cap. Mounting holes The holes incorporated into the underside of the housing foot simplify exact alignment of the units in series production. Dowel pins that are preinstalled in the mounting surface as set out in the table (see page 29) indicate the exact position. If modification of the housing is necessary, the mounting holes can also be used for re-machining purposes. Grease...

Dismounting edge Simplifies dismounting for maintenance work on the bearing units. A lever can be used to easily separate the upper and lower sections of the housing from one another at these points. Lubrication fitting All bearings come with two threaded holes for mounting lubricators. Other positions are possible for the lubricators. These positions are marked on the cast iron surface. From size 524 upwards, the threaded holes come with a screw plug. For smaller sizes, plastic blanking plugs are used. A cone-head lubricator and flat-head lubricator along with optional blanking screws are supplied...

Bearing arrangement construction SNC bearing housings are designed to hold self-aligning roller or ball bearings. The choice of bearing type and the design of the bearing arrangement depend primarily on the type of application. Bearings with cylindrical bore Rolling bearings with a cylindrical bore are mounted directly on the shaft. The selected shaft tolerance should depend on the application and the bearings used. The inner ring of the rolling bearing must be supported against a shaft shoulder. The bearing must always be fitted securely onto the shaft. For easy, safe and quick mounting of the...

Teil 1 SNC. The fundamentals NTN-SNR bearings in ULTAGE quality NTN-SNR bearings in ULTAGE quality NTN-SNR ULTAGE self-aligning roller bearings are designed for applications in which high loads, severe imbalance, contamination, shocks and vibrations can occur. To improve on the excellent performance and reliability of the series, the NTN-SNR ULTAGE self-aligning roller bearings have been optimised in terms of their load ratings and service life. For more information on the quality of NTN-SNR ULTAGE spherical roller bearings, please see page 76 or ask for our ULTAGE catalogue. Fixed / floating...

The single-part grey cast iron regulation discs can be fitted in every SNC housing as an option. They are primarily required to convey excess quantities of grease out of the interior of the housing (grease drain hole must be open). The gap between the regulation disc, the bearing and the housing results in a regulating conveying effect for the lubricant during operation. The excess grease is discharged from the bearing. During installation and after each relubrication interval, this has the advantage that the steady state temperature is reached more quickly. Practical experience has also shown...