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SM 61903 C TA Angular Contact Bearing

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Part Number SM 61903 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.


Bore Diameter d [mm] 17
Outer Diameter D [mm] 30
Width B [mm] 7
Pitch Circle Diameter dm [mm] 23.500
Ball Diameter Dw [mm] 3.970
OD Inner Ring d1 [mm] 21
ID Outer Ring D1 [mm] 26.600
ID Outer Ring - Open Side D2 [mm] 27.700
Chamfer r1,2 [mm] 0.300
Chamfer - Open Side r3,4 [mm] 0.300


Limiting Speed: Oil Lub. noil [RPM] 84,000
Limiting Speed: Grease Lub. ngrease [RPM] 63,000
Dynamic Radial Load Rating C [N] 3,750
Static Radial Load Rating - Steel Balls C0 [N] 1,750
Static Radial Load Rating - Si3N4 Balls C0 HY [N] 1,230

Geometric Data

Number of Balls Z [qty] 14
Contact Angle a0 [°] 15
Bearing Weight m [kg] 0.017

Mating Part Dimensions

Chamfer Associated Component ra max [mm] 0.300
Chamfer Associated Component - Open Side rb max [mm] 0.100
Abutment Diameter Inner Ring da min [mm] 19.500
Abutment Diameter Outer Ring Da max [mm] 27.500

Bearing Preload Data

Light Pre-Load Fv [N] 19
Light Axial Rigidity Cax [N/µm] 16
Medium Pre-Load Fv [N] 55
Medium Axial Rigidity Cax [N/µm] 25
Heavy Pre-Load Fv [N] 110
Heavy Axial Rigidity Cax [N/µm] 34
Minimum Spring Pre-Load Ff [N] 115
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