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High precision angular contact ball bearings

7908UADG/GMP42 - NTN

7908UADG/GMP42

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 diameter40 mm
D - External diameter62 mm
B - Bearing/Inner ring width12 mm
d1 - External diameter inner ring47,6 mm
d2 - External diameter inner ring45,9 mm
D1 - Inner diameter outer ring54,4 mm
D2 - Inner diameter outer ring57,7 mm
a - Charge load application point18 mm
α - Contact angle25 °
rs - Min fillet radius0,6 mm
r1s - Min fillet radius0,3 mm
Precision classP42
Mass0,11 kg
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PRODUCT PERFORMANCE
C - Dynamic load15,2 kN
C0 - Static load11,2 kN
f0 - Coefficient16.1
N lim - Oil lubrication limit speed32200 tr/min
N lim - Grease lubrication limit speed19900 tr/min
Preload levelGM
Preload value0,275 kN
Tmin - Min operating temperature-20 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR44,5 mm
Da max - Max shoulder diameter OR57,5 mm
Db max - Max OR shoulder diameter59,5 mm
r1a - Max fillet radius0,3 mm
ra max - Max shaft & housing fillet radius0,6 mm
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