SIFT BEARING STORE CATALOG

684-2ZFAGBall

684-2Z is a FAG ball bearing, bore 4 mm, O.D. 9 mm, width 4 mm, dynamic rating 0.7 kN. Dimensions, drawing, interchanges and price.

Shielded both sides
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Bore d4mm
Outside dia. D9mm
Width B4mm
Dynamic Cr0.68kN
Static C0r0.23kN
Limiting speed81,000rpm
Weight0.002kg
Cr / C0r3.02
Mean dia. dm6.5mm

Original catalogue drawing - FAG Schaeffler HR 1, page 232

684-2Z 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. D9 mmBore d4 mmWidth B4 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 diameter40.1575
DOutside diameter90.3543
BInner-ring / bearing width40.1575
rChamfer (min)0.10.0039

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)4
Outside dia. D (mm)9
Width B (mm)4
Inner-ring OD d1 (mm)5.2
Seal outside dia. D2 (mm)8.1

Load ratings & speeds

Basic dynamic load rating Cr (lbs)153
Basic static load rating Cor (lbs)51
Basic dynamic load rating Cr (N)680
Basic static load rating C0r (N)225
Fatigue limit load Cur (N)5.8
Factor f012.7
Limiting speed nG (rpm)81,000

Weight

Weight (kg)0.002

Mounting dimensions (fillets / shoulders)

Housing fillet r max (mm)0.1
Shaft shoulder da (mm)4.6
Housing shoulder Da (mm)8.77
Housing fillet ra max (mm)0.1

Bearing life (ISO 281 basic rating life)

C / PEquivalent load P (N)L10 (106 rev)L10h at 3,000 rpm
417064356
61132161,200
8855122,844
10681,0005,556
15453,37518,750

Basic rating life per ISO 281: L10 = (C/P)3 with C = 680 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.232 (dimensions)

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

Interchange - same dimensions, other brands

DesignationBrandTypedDB/TDyn. ratingkg
684ZZ\VVNSKBall494143 lbs0.001

Nearby bore sizes

DesignationBrandTypedDB/TDyn. ratingkg
604-2ZFAGBall41241 kN0.002
624FAGBall41351.3 kN0.003
624-2RSRFAGBall41351.3 kN0.003
624-2ZFAGBall41351.3 kN0.004
634FAGBall41651.7 kN0.006
634-2RSRFAGBall41651.7 kN0.006
634-2ZFAGBall41651.7 kN0.006
623FAGBall31040.6 kN0.001

Request a quotation for 684-2Z

Send us the quantity you need and we will come back with price and lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.