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Single row deep groove ball bearings

6904LLUNR/2AS - NTN

6904LLUNR/2AS

Deep groove ball bearing, radial contact, pressed steel cage, snap ring & groove on outer diameter, contact seals on both sides

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.

Documentation

Product information

PRODUCT DEFINITION
BrandNTN
d - Internal diameter20 mm
D - External diameter37 mm
B - Bearing/Inner ring width9 mm
a min - Min position Groove1,55 mm
a max - Max position groove1,7 mm
rs - Min fillet radius0,3 mm
rNs - Min fillet radius0,3 mm
D3 - Max bottom groove diameter35,7 mm
b min - Min groove width0,95 mm
b max - Max groove width1,2 mm
r0 max - Max bottom groove radius0,25 mm
D4 max - Max outer diameter of assembled stop ring39,8 mm
f - Stop ring thickness0,85 mm
Snap ring referenceR37
Radial clearance classCN
Mass0,036 kg
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PRODUCT PERFORMANCE
C - Dynamic load7,05 kN
C0 - Static load3,7 kN
Cu - Fatigue limit load0,288 kN
f0 - Coefficient14.7
N lim - Grease lubrication limit speed12000 tr/min
Tmin - Min operating temperature-25 °C
Tmax - Max operating temperature110 °C
ABUTMENT
da min - Min shoulder diameter IR22 mm
da max - Max shoulder diameter IR24 mm
Da max - Max shoulder diameter OR35 mm
ra max - Max shaft & housing fillet radius0,3 mm
rNa max - Max fillet radius on segment side0,3 mm
Ca min - Mini segment position2,4 mm
Ca max - Max segment position2,55 mm
Db min - Min stop ring position diameter40,5 mm
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