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High precision angular contact ball bearings

7021UADG/GNP42U3G - NTN

7021UADG/GNP42U3G

High precision angular contact ball bearing, moulded polyamide cage centred on balls

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 diameter105 mm
D - External diameter160 mm
B - Bearing/Inner ring width26 mm
d1 - External diameter inner ring123,5 mm
d2 - External diameter inner ring119,2 mm
D1 - Inner diameter outer ring141,5 mm
D2 - Inner diameter outer ring150,2 mm
a - Charge load application point44,1 mm
α - Contact angle25 °
rs - Min fillet radius2 mm
r1s - Min fillet radius1 mm
Precision classP42
Mass1,58 kg
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PRODUCT PERFORMANCE
C - Dynamic load95 kN
C0 - Static load89 kN
f0 - Coefficient16.1
N lim - Oil lubrication limit speed12400 tr/min
N lim - Grease lubrication limit speed7700 tr/min
Preload levelGN
Preload value0,86 kN
Axial rigidity320 N/µm
Radial rigidity680 N/µm
Tmin - Min operating temperature-20 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR115 mm
Da max - Max shoulder diameter OR150 mm
Db max - Max OR shoulder diameter154,5 mm
r1a - Max fillet radius1 mm
ra max - Max shaft & housing fillet radius2 mm
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