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High precision angular contact ball bearings

7910ADLLBG/GNP42/L749 - NTN

In the ball bearing and high precision bearing ranges, the high precision angular contact ball bearing solves the maximum reliability constraints with increased performance in terms of rigidity, speed, capacity and precision. This bearing is recommended for demanding applications in terms of precision such as machine tool spindles. NTN is getting sub-ranges dedicated to requirements of speed, sealing, specific greasing, etc.

Documentation

Product information

PRODUCT DEFINITION
BrandNTN
d - Internal diameter50 mm
D - External diameter72 mm
B - Bearing/Inner ring width12 mm
a - Charge load application point20,2 mm
α - Contact angle25 °
rs - Min fillet radius0,6 mm
r1s - Min fillet radius0,3 mm
Precision classP42
Mass0,14 kg
PRODUCT PERFORMANCE
C - Dynamic load17,6 kN
C0 - Static load13,9 kN
N lim - Grease lubrication limit speed17400 tr/min
Preload levelGN
Tmin - Min operating temperature-20 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR54,5 mm
Da max - Max shoulder diameter OR67,5 mm
Db max - Max OR shoulder diameter69,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,6 mm

Industry Calcul Factors

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