Extreme duty mounted ball bearings
21 April 2010
Baldor Electric has introduced a Dodge-brand mounted ball bearing that offers extended life in extreme industrial power transmission applications. Designated Dodge Extreme Duty, the new bearings feature a new sealing system and ball retainer, and are available in a variety of housing styles. The 65 degree spacing for setscrews ensures an optimum balance between locking force and inner ring stress.
The new sealing system, QuadGuard, consists of two patented features: a triple lip seal and a rubberised 'flinger'. The triple lip seal offers three points of contact, keeping the lubricant in and contaminants out. The design maximises sealing while minimising drag. The rubberised flinger is a moulded nitrile rubber component that is bonded to the flinger surface and provides an additional barrier to contaminants. The rubber baffled design on the external surface of the flinger enhances the removal of liquid as it rotates, while grease chambers on the internal surface of the flinger prevent lubricant from exiting the bearing.
A new two-piece ball retaining cage, Maxlife, creates a grease compartment around each of the rolling elements. The compartments provide constant contact between ball and grease so an oil film always exists to prevent wear, and minimise friction and heat. The compartmental construction holds in the grease and prevents it from being washed out. This exclusive design extends the life of the bearing and requires less frequent relubrication than standard designs.
For additional protection, the housings are machined with a groove to accept a snap-on polymer end cover to cover exposed, rotating shafts and create safer working conditions. These covers incorporate a drain hole to prevent moisture build-up.
Dodge Extreme Duty ball bearings also utilise the latest synthetic grease technology to provide lower operating temperatures, and extend grease life and the interval between relubrication operations. The range is available in a wide range of imperial sizes plus metric sizes from 20 to 85mm.
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