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High precision angular contact ball bearings

7020UCG/GNP42U3G - NTN

7020UCG/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 diameter100 mm
D - External diameter150 mm
B - Bearing/Inner ring width24 mm
d1 - External diameter inner ring116,9 mm
d2 - External diameter inner ring113 mm
D1 - Inner diameter outer ring133,2 mm
D2 - Inner diameter outer ring141,1 mm
a - Charge load application point28,8 mm
α - Contact angle15 °
rs - Min fillet radius1,5 mm
r1s - Min fillet radius1 mm
Precision classP42
Mass1,27 kg
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PRODUCT PERFORMANCE
C - Dynamic load86 kN
C0 - Static load81 kN
f0 - Coefficient16
N lim - Oil lubrication limit speed15000 tr/min
N lim - Grease lubrication limit speed9400 tr/min
Preload levelGN
Preload value0,46 kN
Axial rigidity126,1 N/µm
Radial rigidity730 N/µm
Tmin - Min operating temperature-20 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da min - Min shoulder diameter IR108,5 mm
Da max - Max shoulder diameter OR141,5 mm
Db max - Max OR shoulder diameter144,5 mm
r1a - Max fillet radius1 mm
ra max - Max shaft & housing fillet radius1,5 mm
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