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6888 - NTN

6888

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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PRODUCT DEFINITION
BrandNTN
d - Internal diameter440 mm
D - External diameter540 mm
B - Bearing/Inner ring width46 mm
rs - Min fillet radius2,1 mm
Radial clearance classCN
Mass22,5 kg
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PRODUCT PERFORMANCE
C - Dynamic load292 kN
C0 - Static load420 kN
Cu - Fatigue limit load12,6 kN
f0 - Coefficient16
Nlim - Oil lubrication limit speed1100 tr/min
Nlim - Grease lubrication limit speed950 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Characteristic outer ring frequency (60 rpm)12,158 Hz
BPFI - Characteristic inner ring frequency (60 rpm)13,842 Hz
FTF - Characteristic cage frequency (60 rpm)0,468 Hz
BSF - Characteristic rolling element frequency (60 rpm)15,368 Hz
ABUTMENT
da min - Min shoulder diameter IR451 mm
Da max - Max shoulder diameter OR529 mm
ra max - Max shaft & housing fillet radius2 mm
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