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7211CG1UJ74 - SNR

7211CG1UJ74

High precision angular contact ball bearing, laminated resin cage centred on outer ring

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-SNR is getting under ranges dedicated to requirements of speed, sealing, specific greasing, etc.

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Specs

PRODUCT DIMENSIONS

Internal diameter d 55 mm
External diameter D 100 mm
Bearing/Inner ring width(B) 21 mm
External diameter inner ring d1 69 mm
Inner diameter outer ring D1 85,8 mm
Inner diameter outer ring D2 93,02 mm
Charge load application point a 21 mm
Contact angle α 15 °
Min fillet radius rs 1,5 mm
Min fillet radius r1s 1 mm
Coefficient f0 14.491
Precision class P4
Mass 0,62 kg
Brand SNR
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PRODUCT PERFORMANCE

Dynamic load, C 55,5 kN
Static load, C0 42,9 kN
Fatigue limit load, Cu 2,3 kN
Axial displacement K Factor 1.17
Preload level 7
Preload value 0,3 kN
Axial rigidity 84 N/µm
Radial rigidity 472 N/µm
Min operating temperature, Tmin -30 °C
Max operating temperature, Tmax 120 °C
Nlim (oil) 21000 tr/min
Nlim (grease) 13500 tr/min
Characteristic cage frequency, FTF 0,411 Hz
Characteristic rolling element frequency, BSF 5,252 Hz
Characteristic outer ring frequency, BPF0 6,164 Hz
Characteristic inner ring frequency, BPFI 8,836 Hz

ABUTMENT

Min shoulder diameter IR da min 63,5 mm
Min IR shoulder diameter (db min) 63,5 mm
Max shoulder diameter OR Da max 91,5 mm
Max OR shoulder diameter (Db max) 91,5 mm
Maxi fillet radius r1a 1 mm
Max shaft & housing fillet radius ra max 1,5 mm
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