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7018HVUJ84 - SNR

7018HVUJ84

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 140 mm
Bearing/Inner ring width(B) 24 mm
External diameter inner ring d1 105,8 mm
Inner diameter outer ring D1 124,2 mm
Inner diameter outer ring D2 131,61 mm
Charge load application point a 39 mm
Contact angle α 25 °
Min fillet radius rs 1,5 mm
Min fillet radius r1s 0,6 mm
Coefficient f0 15.942
Precision class P4
Mass 1,15 kg
Brand SNR
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PRODUCT PERFORMANCE

Dynamic load, C 67,8 kN
Static load, C0 65,7 kN
Fatigue limit load, Cu 3,45 kN
Axial displacement K Factor 0.45
Preload level 8
Preload value 1,79 kN
Axial rigidity 394 N/µm
Radial rigidity 787 N/µm
Min operating temperature, Tmin -30 °C
Max operating temperature, Tmax 120 °C
Nlim (oil) 14000 tr/min
Nlim (grease) 9100 tr/min
Characteristic cage frequency, FTF 0,441 Hz
Characteristic rolling element frequency, BSF 7,518 Hz
Characteristic outer ring frequency, BPF0 8,811 Hz
Characteristic inner ring frequency, BPFI 11,189 Hz

ABUTMENT

Min shoulder diameter IR da min 98,5 mm
Min IR shoulder diameter (db min) 98,5 mm
Max shoulder diameter OR Da max 131,5 mm
Max OR shoulder diameter (Db max) 131,5 mm
Maxi fillet radius r1a 0,6 mm
Max shaft & housing fillet radius ra max 1,5 mm
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