Radial Internal Play
C3 Internal Play (Higher than Cn)
Precision
SP - Precision Higher than P4S
Heat Stabilization
No Heat Stabilization - Temperatures up to 120 °C
Suffix description
BPresent Standard Design With Brass Cage Of Double Pronged Type
SPSpecial Precision Class For Machine Tool Bearings: Dimensional Accuracy Approximately To P5, Running Accuracy Approximately To P4
C3Internal Clearance Larger Than Normal
W33Lubrication Groove And Three Holes In Bearing Outer Ring
Product description
The NNU4938B/SPC3W33 SKF is a double-row precision cylindrical roller bearing. This bearing has a particularly high radial load capacity and high running accuracy. The design consists of a solid inner and outer ring with a double row of cylindrical rollers with a cage. The rolling elements are guided between flanges. This construction enables compact bearing arrangements with high radial stiffness and very high precision and load capacity. The outer ring is separable from the inner ring, facilitating (dis)assembly. Precision cylindrical roller bearings are often used, for example, in the main spindles of machine tools.
The NNU4938B/SPC3W33 SKF is equipped with a cage that prevents the cylindrical rollers from coming into contact with each other. This design allows for controlled movement of the rolling elements. There is less friction than in full-complement cylindrical roller bearings. As a result, higher rotational speeds are possible, and less heat is generated.
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