SKF® “3300 DNR Series” pump bearings have been engineered with an exclusive double-row bearing design and steeper contact angle of 40º to meet the higher thrust demands present in ANSI style pumps. They are especially well-suited for pump applications characterized by high axial loads, marginal lubrication and higher operating temperatures, and significant vibration due to operating conditions such as cavitation. A robust machined brass cage offers improved performance in heavy-duty and poorly lubricated conditions. Standard axial and internal clearance ranges promote load-sharing between the two rows of balls for cooler operation, reduced lubricant degradation, and minimized risk of destructive “skidding” in the inactive row. Their ISO P6 (ABEC3) precision level allows for better control of the bearing’s mounted clearance and less overall vibration. Standard double-row pump bearings are available with a range of seals, shields, and snap-ring options. Custom products can be developed to satisfy particular application requirements. Ideal for retrofitting, users can realize upgraded bearing performance equivalent to a paired bearing arrangement without the cost of modifying a pump.
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