Item NumberNNU4948KM P51 Deutsche Kugellager Fabrik
CategoryCylindrical Roller Bearing Double Row
Weight and Dimensions
Inner (d) MM
240
Outer (D) MM
320
Width (B) MM
80
Inner (d) Inch
9.4488
Outer (D) Inch
12.5984
Width (B) Inch
3.1496
Weight (kg)
16.9
Product Properties
Bore
K - 1:12 Tapered Bore (Standard for Most Types)
Seal
No Seal
Cage Type
M - Brass Cage
External Modification
No External Modification
Radial Internal Play
C1 Internal Play (Less than C2)
Precision
P5 Precision (Higher than P6)
Heat Stabilization
No Heat Stabilization - Temperatures up to 120 °C
Suffix description
KTapered Bore, Taper 1:12
MMachined Brass Cage, Located On The Rolling Elements
P51Combination Of P5 (Dimensional And Running Accuracy To ISO Tolerance Class 5 (Better Than P6)) And C1 (Radial Clearance And Reduced Levels Of Vibration)
Product description
The NNU4948KM P51 Deutsche Kugellager Fabrik 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 NNU4948KM P51 Deutsche Kugellager Fabrik 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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