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CERBEC Balls are made from two types of silicon nitrides made by Saint-Gobain Ceramics: NBD200 and SN101C. Both are qualified by bearing companies worldwide and meet all the essential requirements of a bearing grade silicon nitride. They are both fabricated using glass encapsulation HIPing which assures 100% density, high beta phase content, micron-sized grains, and minimal levels of glass phase. The attached TABLE 1 shows the typical properties for NBD200 and SN101C silicon nitrides.
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GUARDIAN® NARROW WIDTH FLANGELESS
Metallic bearing isolator for non-flooded applications with patented cam-lock system and internal PTFE unitizing seal feature. Flangeless design replaces lip seals with no equipment modification.
Features
* Bronze construction conforms to API 610.
* Performance meets NEMA MG 1-2003 as required in IEEE 841-2001.
* O-ring interference fit requires no arbor press for installation.
* No internal metal-to-metal contact.
* Flangeless design fits in spaces as narrow as 0.325 in (8.25mm).
* Axial Motion: +/-0.015 in (0.38mm)
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SKF Magnetic Bearings has supplied thrust bearings from 130 to 24,500 N (30 to 5,500 lbf), for shaft diameters ranging from 9 to 130 mm (3/8 to 5 inches). These are installed on machines that have rotational speeds ranging from 1,800 to 100,000 rpm. SKF also supplies canned thrust bearing designs for hermetically sealed applications and thrust bearings for high temperature applications up to 220°C (428°F).
The thrust bearings shown above are 17,000 N capacity (3,800 lbf) for a 12,000 rpm turbocompressor with a 120 mm shaft.
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Seal carrier assemblies DRS are screwed to the centre washer of needle roller/axial cylindrical roller bearings and precisely centred there. They seal the bearings from the outside. The sealing elements are supplied as a complete set and comprise a seal carrier with an integral rotary shaft seal, a gasket and socket head cap screws for mounting the carrier on the centre washer of the bearing.
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