MOTION & CONTROL NSK PLUMMER BLٛCKS AND ACCESSRIES - SNN SERIES AND SD SERIES

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Partnership based on trust -and trust based on quality Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. NSK is one of the leading companies with a long tradition in patent applications for machine parts. In our worldwide research centres, we not only concentrate on the development of new technologies, but also on the continuai improvement of quality based on the integrated technology platform of tribology, material technology, analysis and mechatronics. More about NSK at www.nskeurope.com or...

SNN Sries Plummer Blocks Threaded holes designed to also be used for condition monitoring sensors + 1 grease nipple as standard -Dimples for additional holes These can be utilised for sensors or lubrication holes for the seal or bearing High-grade bolts High-grade casting iron Very tough material Seal groove for various types of seals Split seal, v-ring seal, labyrinth seal Dimples for four mounting bolt holes Square-shaped base Facilitates alignment Ideally shaped stiffer design Draining hole as standard Dimples for positioning pins 6

High-performance SNN Sries plummer blocks are highly rigid and easy to handle. They can be equipped with NSK's tough spherical roller bearings, which have high load capacity, low temperature rise and high-strength cages. The SNN range of split plummer blocks is the latest technical evolution from NSK Our modular SNN housing range offers diffrent technical options to match the needs of the most demanding applications. The components are easy to fit, remove and maintain. Equipped with NSK high-performance bearings, SNN split housings will also help you to achieve your cost reduction plans. Easy...

Housing Features - Dsignation The plummer block housings detailed in this brochure are manufactured in accordance with ISO/R113 standards. Bearing Nomenclature Housings Features > Colour: RAL 7001, Pantone 444C > Housing Material: Cast Iron Grade 200 > Cap bolts: Mild steel AISI1010 Grade 8.8 > Metal plugs: Mild steel AISI 1010 > Tolerance of bearing seating: H7 > The bearing seating is protected against corrosion, all the non machined internal parts are primed. > Each housing is supplied with a straight grease nipple (see dimensions in the lubrication section). > Each SNN housing is supplied...

SNN Standard Sealing Arrangements There are several diffrent types of seal designs for use in SNN housings. Many alternative choices are available to the user to ensure that the most suitable solution will be found to meet a wide range of application conditions. G Seals C Seals V Seals TS-U Seals TACK Seals Seal Type G Type C Type V Type TS-U Type TACK Type Material Thermo-plastic Polyurethane Mild steel + Wool & Rayon Mild steel & NBR Cast Iron + NBR Cast Iron + NBR Temprature -35°Cto +80°C -40°C to +100°C -20°Cto +100°C -40°C to +120°C -40°C to +100°C Max. Speed 5m/s (1) 4m/s 7m/s (2) Same...

Supply of Seals A > Double lip seals G type (dsignation example: G509-kit) are supplied in pairs in a plastic bag (4 halves, to equip both sides of the housing) > Felt seals C type (designation example: C509-kit) are supplied in pairs in a plastic bag (4 NBR o-rings, 4 halves/steel adapters, 4 felt strips, to equip both sides of the housing) > v-ring seals V type (designation example: V509-kit) are supplied in pairs in a plastic bag (2 NBR v-rings, 2 mild steel + NBR plates, to equip both sides of the housing) > Labyrinth seals TS-U type (designation example: TS509U) are supplied as a single...

How to order SNN complte Plummer Blocks from NSK A Example 1 - Application with 2 plummer blocks Free end Through shaft diam 50 mm, equiped with 1 spherical roller bearing 22211EAK, double lip seals on both sides. Parts required: > 1 NSK housing SNN511-609 > 1 NSK bearing 22211EAKE4 > 1 NSK adapter sleeve H311 > 1 seal pack G511-KIT (2 seals included) Fixed end Shaft end, diam 50 mm, equiped with 1 spherical roller bearing 22211EAK, double lip seal on 1 side. Parts required: 1 NSK housing SNN511-609 1 NSK bearing 22211EAKE4 > 1 NSK adapter sleeve H311 > 1 locating ring kit SR100/9.5-KIT (2 rings...

Maintenance Plummer blocks typical arrangement Usually, a shaft is supported by 2 plummer blocks or more if the shaft is very long. One plummer block will locate the shaft axially. This bearing is referred to as the "Fixed End". In the fixed plummer block, to prevent axial displacement of the bearing, 2 locating rings are installed, one on either side of the bearing. Axial displacement of the shaft is then impossible (Fig. 1). If the system is subjected to variations of temperature, the shaft may expand or contract axially. If both bearings are fixed, this could result in excessive loading on...

Lubrication SNN plummer blocks have been developed primarily for grease lubrication. NSK SNN housings are equiped as standard with 1 straight grease nipple, 2 lubrication holes, 1 on one side of the cap, the other in the centre of the cap to enable lubrication through the bearing outer ring grease groove. This relubrication method is preferred as fresh grease is delivered directly to the bearing. SNN housings are also equiped with a threaded drain hole. The application conditions (speeds, loads, temperature) will determine the grease re-lubrication intervals and quantity. However, in addition...