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6840JR - NTN

6840JR

Deep groove ball bearing, radial contact, pressed steel cage, 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 200 mm
External diameter D 250 mm
Bearing/Inner ring width(B) 24 mm
Min fillet radius rs 1,5 mm
Radial clearance class CN
Mass 2,73 kg
Brand NTN
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PRODUCT PERFORMANCE

Dynamic load, C 74 kN
Static load, C0 91,5 kN
Fatigue limit load, Cu 2,75 kN
Coefficient f0 16.1
Nlim (oil) 2700 tr/min
Nlim (grease) 2300 tr/min
Min operating temperature, Tmin -40 °C
Max operating temperature, Tmax 120 °C
Characteristic cage frequency, FTF 0,466 Hz
Characteristic rolling element frequency, BSF 14,852 Hz
Characteristic outer ring frequency, BPF0 11,662 Hz
Characteristic inner ring frequency, BPFI 13,338 Hz

ABUTMENT

Min shoulder diameter IR da min 208 mm
Max shoulder diameter OR Da max 242 mm
Max shaft & housing fillet radius ra max 1,5 mm
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