For many applications, such bearings are an economical and simple way of incorporating reliable ball bearings into machinery or equipment. Rugged cast iron housings are available to accept bearings with bores ranging from 12 to 120mm diameter, with imperial equivalents also offered. The bearings are pregreased and fitted with seals, and most cast iron housings allow relubrication of the bearing via a hole kept sealed with a plastic plug.
This article was originally published on Engineeringtalk on 8 July 2003 at 8.00am (UK)
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Customers have a choice of flanged housings, plummer block housings and takeup housings.
The same three styles of housing are also available in the pressed steel range, with bearing sizes ranging from 12 to 60mm as well as imperial equivalents.
For the pressed steel housings, however, all the bearings are maintenance-free, sealed-for-life units.
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Radial insert ball bearings are characterised by spherical outer surfaces that fit the housings and therefore help to compensate for shaft misalignment, together with an inner ring that is extended on one or both sides.
INA offers two alternative arrangements for fixing the inner ring to the shaft: eccentric locking collars or two set screws.
Standard radial insert bearings and housings will perform adequately in most commonly encountered environments, coping with moisture and particulate contamination.
Nonetheless, for corrosive conditions INA offers its Corrotect protective coating that shrugs off moisture, contaminated water, salt spray, and weak alkaline or acidic cleaning solutions.
If even greater protection is required, INA can supply stainless steel bearings and housings.
Ample information is published by INA to assist specifiers, designers and maintenance engineers who need to select radial insert bearings and housings.
As well as charts that indicate recommended combinations of bearings and housings (TPI 106), there is also the Medias Professional CD-Rom (an online version of which is available for those who have access to the Internet) and INA's applications engineers can run the powerful Bearinx bearing calculation software if required.
In the most complex cases, INA's UK-based engineers can also call upon the expertise at INA's German Technical Centre.
本文转自：China Industry News