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7218CG1UJ74 - SNR

7218CG1UJ74

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 90 mm
External diameter D 160 mm
Bearing/Inner ring width(B) 30 mm
External diameter inner ring d1 113,9 mm
Inner diameter outer ring D1 136,4 mm
Inner diameter outer ring D2 149,7 mm
Charge load application point a 32 mm
Contact angle α 15 °
Min fillet radius rs 2 mm
Min fillet radius r1s 1 mm
Coefficient f0 14.644
Precision class P4
Mass 2,24 kg
Brand SNR
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PRODUCT PERFORMANCE

Dynamic load, C 121 kN
Static load, C0 105 kN
Fatigue limit load, Cu 4,95 kN
Axial displacement K Factor 1.07
Preload level 7
Preload value 0,76 kN
Axial rigidity 129 N/µm
Radial rigidity 733 N/µm
Min operating temperature, Tmin -30 °C
Max operating temperature, Tmax 120 °C
Nlim (oil) 13000 tr/min
Nlim (grease) 8400 tr/min
Characteristic cage frequency, FTF 0,414 Hz
Characteristic rolling element frequency, BSF 5,458 Hz
Characteristic outer ring frequency, BPF0 6,212 Hz
Characteristic inner ring frequency, BPFI 8,788 Hz

ABUTMENT

Min shoulder diameter IR da min 100 mm
Min IR shoulder diameter (db min) 100 mm
Max shoulder diameter OR Da max 150 mm
Max OR shoulder diameter (Db max) 150 mm
Maxi fillet radius r1a 1 mm
Max shaft & housing fillet radius ra max 2 mm
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