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High precision angular contact ball bearings

7902UG/GMP4 - NTN

7902UG/GMP4

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 diameter15 mm
D - External diameter28 mm
B - Bearing/Inner ring width7 mm
d1 - External diameter inner ring19,3 mm
d2 - External diameter inner ring18,3 mm
D1 - Inner diameter outer ring23,7 mm
D2 - Inner diameter outer ring25,8 mm
a - Charge load application point6,4 mm
α - Contact angle30 °
rs - Min fillet radius0,3 mm
r1s - Min fillet radius0,15 mm
Precision classP4
Mass0,02 kg
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PRODUCT PERFORMANCE
C - Dynamic load5,2 kN
C0 - Static load2,68 kN
N lim - Oil lubrication limit speed54500 tr/min
N lim - Grease lubrication limit speed40000 tr/min
Preload levelGM
Preload value0,118 kN
Tmin - Min operating temperature-20 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR17,5 mm
Da max - Max shoulder diameter OR25,5 mm
Db max - Max OR shoulder diameter26,8 mm
r1a - Max fillet radius0,15 mm
ra max - Max shaft & housing fillet radius0,3 mm
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