d - 9 mm
D - 20 mm
B - 6 mm
d1 - 12.5 mm
d2 - 11.76 mm
D1 - 16.52 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.15 mm
a - 5.2 mm
da - min. - 11 mm
db - min. - 11 mm
Da - max. - 18 mm
Db - max. - 19.2 mm
ra - max. - 0.3 mm
rb - max. - 0.15 mm
dn - 13.3 mm
Basic dynamic load rating - C - 2 kN
Basic static load rating - C0 - 0.8 kN
Fatigue load limit - Pu - 0.034 kN
Limiting speed for grease lubrication - 133000 r/min
Limiting speed for oil lubrication - 200000 mm/min
Ball - Dw - 3.175 mm
Ball - z - 11
Gref - 0.09 cm3
Calculation factor - f0 - 7.4
Preload class A - GA - 11 N
Preload class B - GB - 32 N
Preload class C - GC - 64 N
Calculation factor - f - 1.03
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.05
Calculation factor - f2C - 1.09
Calculation factor - fHC - 1.01
Preload class A - 11 N/micron
Preload class B - 17 N/micron
Preload class C - 24 N/micron
Mass bearing - 0.007 kg
Hot number:KOYO 7208 B/DB NTN 23134 CC/W33 KOYO 23056 CACK/33+H 3056 NSK 53209 NACHI NNU 4944 K OKB 52140 FBJ 1623ZZ NACHI 7328BDT SKF NN 3072 K/SPW33 ZEN S7308B CYSD W6206-2RSNR ELGES GE-400ES SKF C 3144 SKF HM 31/560 SKF IR 17x20x30.5
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