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Double-row self-aligning ball bearings

1208 - SNR

1208

Self-aligning ball bearing, pressed steel cage, open

Documentation

Product information

PRODUCT DEFINITION
BrandSNR
d - Internal diameter40 mm
D - External diameter80 mm
B - Bearing/Inner ring width18 mm
d1 - External diameter inner ring54 mm
D1 - Inner diameter outer ring67,1 mm
rs - Min fillet radius1,1 mm
Radial clearance classCN
Precision classP0
Mass0,417 kg
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PRODUCT PERFORMANCE
C - Dynamic load18,9 kN
C0 - Static load6,5 kN
Cu - Fatigue limit load0,3 kN
e - Coefficient0.22
Y0 - Static axial load coefficient3.01
Y1 - Lower axial load coefficient2.87
Y2 - Upper axial load coefficient4.44
N ref - Reference thermal speed8600 tr/min
N lim - Mechanical Limit Speed11000 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
BEARING FREQUENCIES
BPFO - Over rolling frequency on outer ring (60 rpm)7,279 Hz
BPFI - Over rolling frequency on inner (60 rpm)9,721 Hz
BSF - Over rolling frequency on rolling element (60 rpm)6,747 Hz
BRF - Rotational frequency – rolling element (60 rpm)3,374 Hz
FTF - Rotational frequency - cage (60 rpm)0,428 Hz
ABUTMENT
da min - Min shoulder diameter IR46,5 mm
Da max - Max shoulder diameter OR73,5 mm
ra max - Max shaft & housing fillet radius1 mm
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