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6311N - NTN

6311N

Deep groove ball bearing, radial contact, pressed steel cage, snap ring groove on outer diameter, open

The single row deep-groove ball bearing is the most popular bearing. It is available in a wide range of sizes with several possible options: sealing with shields or seals, presence of a retaining ring, varied clearances, several cage types, etc.

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Technical datasheet

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Specs

PRODUCT DIMENSIONS

Internal diameter d 55 mm
External diameter D 120 mm
Bearing/Inner ring width(B) 29 mm
Min position Groove a min 3,86 mm
Max position groove a max 4,06 mm
Min fillet radius rs 2 mm
Min fillet radius rNs 0,5 mm
Max bottom groove diameter D3 115,21 mm
Min groove width b min 3,1 mm
Max groove width b max 3,4 mm
Max bottom groove radius r0 max 0,6 mm
Radial clearance class CN
Mass 1,37 kg
Brand NTN
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PRODUCT PERFORMANCE

Dynamic load, C 79,5 kN
Static load, C0 45 kN
Fatigue limit load, Cu 3,5 kN
Coefficient f0 13.2
Nlim (oil) 6800 tr/min
Nlim (grease) 5800 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 120 °C
Characteristic cage frequency, FTF 0,384 Hz
Characteristic rolling element frequency, BSF 4,081 Hz
Characteristic outer ring frequency, BPF0 3,072 Hz
Characteristic inner ring frequency, BPFI 4,928 Hz

ABUTMENT

Min shoulder diameter IR da min 64 mm
Max shoulder diameter OR Da max 111 mm
Max shaft & housing fillet radius ra max 2 mm
Max fillet radius on segment side rNa max 0,5 mm
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