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SM 61904 C TA Steel Angular Contact Bearing

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Part Number SM 61904 C TA
Series SM
Bearing Type Angular Contact
GMN's S series angular contact bearing dimension drawing. Drawing of bearing dimensions with blue lines indicating diameter measurements corresponding to numbers in the data tables.

Dimensions

Bore Diameter d [mm] 20
Outer Diameter D [mm] 37
Width B [mm] 9
Pitch Circle Diameter dm [mm] 28.500
Ball Diameter Dw [mm] 4.760
OD Inner Ring d1 [mm] 25.100
ID Outer Ring D1 [mm] 31.900
ID Outer Ring - Open Side D2 [mm] 33.200
Chamfer r1,2 [mm] 0.300
Chamfer - Open Side r3,4 [mm] 0.300

Ratings

Limiting Speed: Oil Lub. noil [RPM] 70,000
Limiting Speed: Grease Lub. ngrease [RPM] 52,000
Dynamic Radial Load Rating C [N] 5,400
Static Radial Load Rating - Steel Balls C0 [N] 2,700
Static Radial Load Rating - Si3N4 Balls C0 HY [N] 1,870

Geometric Data

Number of Balls Z [qty] 15
Contact Angle a0 [°] 15
Bearing Weight m [kg] 0.036

Mating Part Dimensions

Chamfer Associated Component ra max [mm] 0.300
Chamfer Associated Component - Open Side rb max [mm] 0.150
Abutment Diameter Inner Ring da min [mm] 23
Abutment Diameter Outer Ring Da max [mm] 33.500

Bearing Preload Data

Light Pre-Load Fv [N] 30
Light Axial Rigidity Cax [N/µm] 22
Medium Pre-Load Fv [N] 80
Medium Axial Rigidity Cax [N/µm] 32
Heavy Pre-Load Fv [N] 170
Heavy Axial Rigidity Cax [N/µm] 45
Minimum Spring Pre-Load Ff [N] 165

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