SIFT BEARING STORE CATALOG

61903FAGBall

61903 is a FAG ball bearing, bore 17 mm, O.D. 30 mm, width 7 mm, dynamic rating 4.9 kN. Dimensions, drawing, interchanges and price.

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Bore d17mm
Outside dia. D30mm
Width B7mm
Dynamic Cr4.9kN
Static C0r2.55kN
Limiting speed34,500rpm
Weight0.014kg
Cr / C0r1.92
Mean dia. dm23.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 240

61903 FAG Ball bearing catalogue drawing

Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.

Scale cross-section

DdBOutside dia. D30 mmBore d17 mmWidth B7 mm

Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own dimensions for selection reference only - not a manufacturing or assembly drawing.

Dimension table (mm / inch)

SymbolDimensionmminch
dBore diameter170.6693
DOutside diameter301.1811
BInner-ring / bearing width70.2756
rChamfer (min)0.30.0118

Notes

Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.

Main dimensions

Bore d (mm)17
Outside dia. D (mm)30
Width B (mm)7
Inner-ring OD d1 (mm)21
Inner-ring shoulder dia. D1 (mm)26.8

Load ratings & speeds

Basic dynamic load rating Cr (lbs)1102
Basic static load rating Cor (lbs)573
Basic dynamic load rating Cr (N)4900
Basic static load rating C0r (N)2550
Fatigue limit load Cur (N)146
Factor f014.7
Limiting speed nG (rpm)34,500
Reference speed nB (rpm)17,800

Weight

Weight (kg)0.014

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)0.3
Shaft shoulder da (mm)19
Housing shoulder Da (mm)28
Housing fillet ra max (mm)0.3

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
41,22564356
68172161,200
86125122,844
104901,0005,556
153273,37518,750

Basic rating life per ISO 281: L10 = (C/P)3 with C = 4,900 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.

Source & traceability

BrandFAG
Source catalogueFAG / Schaeffler Rolling Bearings HR 1
Catalogue pagep.240 (dimensions)

Load ratings in newtons, fatigue limit load Cur, limiting speed nG and reference speed nB.

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
6903NSKBall173071,030 lbs0.018
7903A5NSKPrecision / Angular Contact173071,070 lbs0.018
7903CNSKPrecision / Angular Contact173071,120 lbs0.018

Same dimensions, same brand

DesignationBrandTypedDB/TDyn. ratingkg
61903-2RSRFAGBall173074.9 kN0.02
61903-2ZFAGBall173074.9 kN0.017
B71903-C-T-P4SFAGPrecision / Angular Contact173075.3 kN0.017
B71903-E-T-P4SFAGPrecision / Angular Contact173075 kN0.017
HCB71903-C-T-P4SFAGPrecision / Angular Contact173073.6 kN0.02
HCB71903-E-T-P4SFAGPrecision / Angular Contact173073.5 kN0.02
HCS71903-C-T-P4SFAGPrecision / Angular Contact173072 kN0.017
HCS71903-E-T-P4SFAGPrecision / Angular Contact173071.9 kN0.017

Series variants (different suffix)

DesignationBrandTypedDB/TDyn. ratingkg
61903-2RSRFAGBall173074.9 kN0.02
61903-2ZFAGBall173074.9 kN0.017

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
1203-TVHFAGBall1740128.1 kN0.073
1303-TVHFAGBall17471412.9 kN0.065
16003FAGBall173586.4 kN0.032
2203-2RS-TVHFAGBall1740168.1 kN0.098
2203-TVHFAGBall17401611.8 kN0.054
2303-2RS-TVHFAGBall17471912.9 kN0.175
2303-TVHFAGBall17471913.9 kN0.155
4203-B-TVHFAGBall17401615.6 kN0.1

Request a quotation for 61903

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